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Asynchronous Ports   5

  This chapter describes how to use the command line interface to configure asynchronous ports. The PortMaster 4 comes with two asynchronous console ports on the manager module--C0 and C1.

  Note ¯ To configure the asynchronous ports, you must first access the system manager module using the set view  command. 

  Detailed command definitions follow a command summary table. A summary table for the modem table commands also appears in this chapter, followed by a description of the commands.
  Asynchronous ports can be configured as login, device, or network ports, or any combination of these.

  Note ¯ After making any configuration changes to an asynchronous port, you must use the reset slot Slotnumber command for the changes to take effect

 
 

       Displaying Asynchronous Port Information

  To display information about your configuration, use the following commands:
  For general information about command line interface commands, refer to Chapter 1, "Introduction."
 

       Summary of Asynchronous Commands

  The asynchronous port commands in Table 5-1 configure asynchronous serial ports. Commands marked with a leading bullet (·) can be used only if the port is configured for a dedicated network connection with the set network hardwired  command.

  Table 5-1 Asynchronous Port Configuration Commands 

 

 

  Command Syntax     

 

 add modem ModemName(short) "ModemName(long)" "Speed" String  - see page 5-37

 

 attach C0  - see page 5-4

 

 delete modem ModemName(short)  - see page 5-38

 

 reset C0  - see page 2-13

 

 save ports  - see page 2-15

 

 set C0|all access on|off  - see page 5-6

  ·

 set C0 address Ipaddress  - see page 5-6

 

 set C0|all cd on|off  - see page 5-7

  ·

 set C0 compression on|off|stac|vj  - see page 5-9

 

 set C0|all databits 5|6|7|8  - see page 5-10

  ·

 set C0 destination Ipaddress [Ipmask]  - see page 5-10

 

 set C0 device Device [network dialin|dialout|twoway]  - see page 5-11

 

 set C0|all dialback_delay Seconds  - see page 5-12

 

 set C0|all dtr_idle on|off  - see page 5-13

 

 set C0 extended on|off  - see page 5-13

 

 set C0|all group Group  - see page 5-14

 

 set C0|all hangup on|off  - see page 5-15

 

 set  C0|all host default |prompt |[1 |2 |3 |4 ]Ipaddress  - see page 5-15

 

 set C0|all idletime Number [minutes|seconds]  - see page 5-16

  ·

 set C0|all ifilter Filtername  - see page 5-17

  ·

 set C0 ipxnet Ipxnetwork  - see page 5-18

 

 set C0|all login [network dialin|dialout|twoway]  - see page 5-19

  ·

 set C0|all map Hex  - see page 5-20

 

 set C0|all message String  - see page 5-21

 

 set C0|all modem-type ModemName  - see page 5-21

  ·

 set C0|all mtu MTU  - see page 5-22

  ·

 set C0 netmask Ipmask  - see page 5-23

 

 set C0|all network dialin|dialout|twoway  - see page 5-23

 

 set C0|all network hardwired  - see page 5-23

  ·

 set C0|all ofilter [Filtername]  - see page 5-25

 

 set C0 ospf on|off  - see page 8-7

 

 set C0|all override xon|rts|speed|parity|databits on|off  - see page 5-25

 

 set C0|all parity even|none|odd|strip  - see page 5-26

 

 set C0|all prompt String  - see page 5-27

  ·

 set C0 protocol slip|ppp|x75-sync  - see page 5-28

  ·

 set C0|all rip on|off|broadcast|listen|v2 {broadcast|multicast|on|v1-compatibility}  - see page 7-17

 

 set C0 route-filter incoming|outgoing [Filtername]  - see page 7-8

 

 set C0|all rts/cts on|off  - see page 5-28

 

 set C0|all security on|off  - see page 5-29

 

 set C0|all
service_device netdata|portmaster|rlogin|telnet [Tport] 		 - see page 5-30

 

 set C0|all service_login netdata|portmaster|rlogin|telnet [Tport]  - see page 5-31

 

 set C0|all speed [1|2|3] 300|600|1200|2400|4800|9600|
19200|38400|57600|76800|115200 		 - see page 5-32

 

 set C0|all stopbits 1|2  - see page 5-33

 

 set C0|all termtype [String]  - see page 5-33

 

 set C0 twoway Device [network dialin|dialout|twoway]  - see page 5-34

 

 set C0 username|autolog String  - see page 5-35

 

 set C0|all xon/xoff on|off  - see page 5-36

 

 show all  - see page 2-19

 

 show C0  - see page 2-36
 

       Asynchronous Port Types

  Asynchronous port types are described in Table 5-2. The first three options can be combined with the last three options. A port configured as a network hardwired port cannot be combined with another port type.

  Table 5-2 Asynchronous Port Types

 
  Port Type    Description 
 login  The port allows a user to log in and establish a terminal session to a host on the network.
 device  The port allows a user to access a shared device--for example, a printer or modem--via a host on the network, which can originate a connection to the port.
 twoway  The port allows both inbound  and outbound  connections--user login and shared modem device connections, in this case.
 network hardwired  The port provides a permanent network connection--for example, a WAN link over a dedicated point-to-point asynchronous leased line.
 network
dialin 		 The port allows a dial-in network user to establish a network connection using SLIP or PPP.
 network
dialout 		 The port allows network users to dial out to remote locations--the Internet or another office, for example--defined in the location table.
 network
twoway 		 The port allows both inbound and outbound connections--network dial-in and network dial-out connections, in this case.
 

       Asynchronous Commands

  These commands affect the asynchronous ports of the PortMaster.
 

       attach C0

  This command allows you to communicate directly to a device attached to a specified asynchronous or ISDN PortMaster port.

  attach C0

 
 C0  c0 or c1--asynchronous console port.

  Typical uses of this command are as follows:
  You can use AT commands with a host attached to an external analog modem connected to a PortMaster asynchronous port.
  When your host is attached to a modem connected to an ISDN BRI or PRI line, you can use the following special AT commands to make an outbound call with the following services:
 
 at&n-- Unrestricted 64Kbps data connection.
 at&n0-- 3.1KHz audio service.
 at&n1-- Speech service.
 at&n55-- 3.1KHz audio service.
 at&n56-- Restricted 56Kbps data connection.
 at&n64-- Unrestricted 64Kbps data connection.
 

  Note ¯ Speech and 3.1KHz audio services each uses a single voice-grade channel. The speech service, however, can be used with compression and encoding techniques that are appropriate only for human speech. The 3.1KHz audio service is useful for data-over-voice communications between countries using T1 lines--such as the U.S.A., and countries using E1 lines--such as those in Europe.

  Each of these special AT commands returns an "OK." You must then enter the
atdt +  telephone number command to place the call.
  To communicate directly to an analog modem attached to asynchronous port C0, and configure the modem with the AT command at&f1s0=1&w , use the attach  command as follows:

  Command> attach C0
 Trying 192.168.1.1
Connected - Escape character is `^]' (Ctrl  + Right bracket )
at&f1s0=1&w
 OK
^]
 telnet> send esc
 Connection Closed
Command>

 

       set C0|all access

  This command sets the access override for a single asynchronous port or all asynchronous ports, and is used in conjunction with the access filter.

  set C0|all access on|off

 
 on  Turns access override on.
 off  Turns access override off. This is the default.

  When access override is set to on , users can override the port's access filter with their own access filter by providing a correct username and password. User access filters must first be defined before you can use this option. Refer to the PortMaster 4 Configuration Guide for more information on defining access filters.
  You can set the access override for all asynchronous ports simultaneously by using the set all access  command.
 

       set C0 address

  This command sets the local IP address of a selected network hardwired asynchronous port to create a numbered interface.

  set C0 address Ipaddress

 
 Ipaddress  Hostname or IP address.

  If the local IP address is set to 0.0.0.0, the PortMaster uses the Ether1 IP address for this end of the serial link. If the local IP address is set to 255.255.255.255, the PortMaster negotiates an IP address for the hardwired connection.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0|all cd

  This command enables the PortMaster to monitor the presence of the data carrier detect (DCD) signal on an external modem attached to the asynchronous port to determine whether the line is in use.

  set C0|all cd on|off

 
 on  Monitors presence of the DCD signal.
 off  Does not monitor presence of the DCD signal. This is the default.

  You can set the command for all asynchronous ports simultaneously by using the set all cd  command.
  If set on , the PortMaster tracks the actual state of the DCD signal as input on the port.
If set off , the PortMaster assumes that DCD is always asserted--DCD is high.
  The following table indicates the effect of DCD assertion for each port type:
 
  Asynchronous Port     Effect of DCD Assertion 
  Type    DCD Low--Not Asserted    DCD High--Asserted 
 login   The port is unavailable.  The PortMaster initiates authentication and displays a login prompt.
 device   The port is unavailable.  The port is available for the device service.
 twoway   The port is available for device services.  The port attempts to establish an inbound connection and disable the device service.
 network hardwired   The port is unavailable.  The port attempts to establish a network connection.
 network dialin   The port is unavailable.  The PortMaster initiates authentication and displays a login prompt.
 network dialout   The transition of DCD from asserted to not asserted resets the port.  The port is unaffected. However, a change in DCD to not asserted resets the port.
 network twoway   The port is available for network dial-in.  The port attempts to establish a network connection and disable the network dial-in.
 

       set C0 compression

  This command sets Van Jacobson TCP/IP header compression and/or Stac LZS data compression on a network hardwired asynchronous port.

  set C0 compression on|off

 
 on  Enables compression. The PortMaster tries to negotiate both Van Jacobson and Stac LZS compression.
 off  Disables compression.
 stac  Enables Stac LZS data compression only.
 vj  Enables Van Jacobson TCP/IP header compression only.
|stac|vj

  Van Jacobson TCP/IP header compression can be used for SLIP and PPP connections. With SLIP, both sides need to be configured identically. For PPP connections, the PortMaster supports both bidirectional and unidirectional compression.
  The PortMaster supports Stac LZS data compression only for PPP connections with bidirectional compression. Stac LZS data compression cannot be used for SLIP connections.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0|all databits

  This command sets the number of data bits per byte for a single asynchronous port or all asynchronous ports.

  set C0|all databits 5|6|7|8

 
 5  5 data bits.
 6  6 data bits.
 7  7 data bits.
 8  8 data bits. This is the default.

  The default of 8 is the most widely used.
  You can set the data bits for all the asynchronous ports simultaneously by using the
set all databits  command.
 

       set C0 destination

  This command sets the IP address and the netmask of the remote router for a network hardwired asynchronous port connection.

  set C0 destination Ipaddress [Ipmask]

 
 Ipaddress  IP address in dotted decimal notation or 39-character hostname of the remote router.
 Ipmask  IP netmask in dotted decimal notation.

  If the remote destination is set to 255.255.255.255 for PPP connections, the PortMaster attempts to learn the remote system IP address. If the destination is set to 0.0.0.0, the port is disabled.

  Note ¯ This command is used only on network hardwired ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0 device

  This command sets an asynchronous port to provide access to a shared network device via a host--or for device sharing and remote dial-in and/or dial-out access.

  set C0 device Device [network dialin|dialout|twoway]

 
 Device  Designation for the shared host device--usually a printer or modem--for example, /dev/ttyp0  or /dev/network .
 dialin  In addition to allowing device sharing, the port accepts dial-in-only network connections. The remote system is required to enter a username and password. Dial-in connections to the network are controlled by the RADIUS server or the user table.
 dialout  In addition to allowing device sharing, the port becomes available for dialing to remote destinations and initiating network connections to those destinations. Dial-out connections from the network are controlled by the location table.
 twoway  In addition to allowing device sharing, the port accepts dial-in connections to the network, as well as being available for dial-out to remote destinations.

  An asynchronous port configured as a device port operates as a host device. You must also do the following to establish device sharing:
  In addition to setting an asynchronous port for device sharing, you can also set it for network dial-in and/or dial-out use by multiple users. Multiple users can dial in to the network through the port from remote locations, dial out from the network through the port to remote locations--like another office or the Internet--or both.
  In the following example, a PortMaster shared device--/dev/ttyp0 --is shown. Note that two ports cannot have the same tty designation.
 

       set C0|all dialback_delay

  This command sets the delay between the disconnection of a callback user and the time when the PortMaster can return the user's call to establish a connection.

  set C0|all dialback_delay Seconds

 
 Seconds  The delay time from 0 to 60, in seconds. The default is 0.

  Modems that take a long time to reset after DTR drops require a callback delay, so that the modem is ready to accept dial commands after the PortMaster has disconnected the user.
  You can simultaneously set the delay time for all ports by using the set all dialback_delay  command.
 

       set C0|all dtr_idle

  This command turns the DTR signal off to enable bidirectional communications, or turns it back on.

  set C0|all dtr_idle on|off

 
 on  DTR is on, and any DTR drop is for 500ms. This is the default.
 off  DTR is off. Allows bidirectional communications.

  This command changes the behavior of the port to better accommodate connecting the PortMaster to systems or hosts that do not support TCP/IP, but do have serial ports. This type of connection requires that you connect the PortMaster port to the host, typically with a null modem cable.
  Set DTR idle when you want to connect a PortMaster to a bulletin board service (BBS) or other host allowing bidirectional communications. You can simultaneously turn DTR on or off on all ports by using the set all dtr-idle  command.
  Refer to the PortMaster 4 Configuration Guide for more information.
  set C0 modem-type ModemName - page 5-21
 

       set C0|all extended

  This command sets the extended mode on  or off  for a single asynchronous port, or for all asynchronous ports.

  set C0|all extended on|off

 
 on  Turns extended mode on.
 off  Turns extended mode off. This is the default.

  When extended mode is on , the show  C0  command provides more detailed output.
 

       set C0|all group

  This command assigns asynchronous ports to external modem pools for use by dial-out locations. A group number is assigned to each location in the location table. Refer to Chapter 11, "Locations and DLCIs," for more information.

  set C0|all group Group

 
 Group  Group number, from 0 to 100. Default is 0.

  For dial-out modem pools to work, each port must be assigned to a dial group, and each location must specify a dial group. All ports can be assigned to a single group with the set all group  Group  command.
 
 

       set C0|all hangup

  This command controls whether the DTR signal on a port, or on all ports, is dropped for 500 milliseconds (ms) after the termination of a user session.

  set C0|all hangup on|off

 
 on  DTR is dropped after the session terminates.
This is the default.
 off  DTR is not dropped after the session terminates.

  Resetting the port administratively with the reset  command always drops the DTR signal.
 

       set C0|all host

  This command sets the default IP address or hostname for login sessions for a single asynchronous port or all asynchronous ports.

  set C0|all host default|prompt|[1|2|3|4]Ipaddress

 
 default  Uses the default host setting.
 prompt  Displays the host prompt before the login prompt. The user is required to enter a valid hostname or Internet address for a host on the network. Entering PPP  or SLIP  at the prompt returns a login prompt.
 Ipaddress  A specified IP address or hostname of a login host or device host.
 1|2|3|4  Used to specify alternate hosts, with the primary host being 1. The default is 1.

  The login host is the host to which the user is connected upon login, in one of the three ways. Use the set host  command to define a default host. After you set the login host on a port, prompts are displayed in the following order:

  host:

  login:

  Password:

  You can set the login host for all asynchronous ports simultaneously by using the
set all host  command, as shown in the example.
  If you do not want the PortMaster to provide login or host device service, do not use this command. Setting the hostname to 0.0.0.0 removes the entry.
 
 

       set C0|all idletime

  This command indicates how long the PortMaster waits after outbound activity stops on a single asynchronous port or all asynchronous ports, before disconnecting a dial-in connection.

  set C0|all idletime Number [minutes|seconds]

 
 Number  Timeout value in minutes or seconds. Any value from 0 to 240. The default value is 0.
 minutes  Sets the idle time in minutes. This is the default.
 seconds  Sets the idle time in seconds.

  If the idle time value is set to 0, the idle timer is disabled.
  If the value is set to 2 seconds or a longer interval, the port is reset after having no traffic for the designated time.
  If the idle time is set to the special value of 1 second, a dial-in user has 5 minutes to respond to a login, password, or host prompt. If the user does not respond, the port resets and becomes available to another user. Setting the idle time to 1 second also turns off the idle timer after the user logs in.

  Note ¯ The idle time special value of 1 second applies only to asynchronous ports that have modem control turned on with the set  C0 cd on  command. Ports that are in the command state--with an administrator logged on--are not timed out with the special value of 1 second.

  To simultaneously set the idle time for all asynchronous ports, use the set all idletime  command as shown in the example.
 

       set C0|all ifilter

  This command sets an input packet filter for packets entering the PortMaster on a single network hardwired asynchronous port, or all network hardwired asynchronous ports. The command can also be used to set an access filter for login users on these ports.

  set C0|all ifilter [Filtername

 
 Filtername  Input filter name that is in the filter table. Maximum of 15 characters.
]

  When an input filter is specified on a network hardwired port, all packets received from the interface are evaluated against the rule set for this filter.
  This filter is used as an access filter for login users who are prompted for a host, and as the input filter for network hardwired ports. Filters become effective after the port is reset and when a user logs in.
  This setting is not used for dial-in and dial-out networking. Filters for dial-in users are set in the user table or RADIUS, and filters for dial-out locations are set in the location table.
  To remove the input filter, enter the command without a filter name.
  To simultaneously set the input filter for all hardwired asynchronous, use the set all ifilter  command.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0 ipxnet

  This command sets the IPX network number for the network hardwired asynchronous or synchronous connection.

  set C0 ipxnet Ipxnetwork

 
 Ipxnetwork  IPX network number--a 32-bit hexadecimal value.

  IPX traffic can be passed through a port if you assign an IPX network number to the hardwired network connection. The serial link itself must have a unique IPX network number that is different from those at each end of the Ethernet.

  Note ¯ This command is used only on network hardwired asynchronous or synchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0|all login

  This command sets a single asynchronous port or all asynchronous ports for user login--or for user login and remote dial-in and/or dial-out access.

  set C0|all login [network dialin|dialout|twoway]

 
 dialin  In addition to allowing user login, the port accepts dial-in-only network connections. The remote system is required to enter a username and password. Dial-in connections to the network are controlled by the RADIUS server or the user table.
 dialout  In addition to allowing user login, the port becomes available for dialing to remote destinations and initiating network connections to those destinations. Dial-out connections from the network are controlled by the location table.
 twoway  In addition to allowing user login, the port accepts dial-in connections to the network, as well as being available for dial-out to remote destinations.

  Using the set  C0  login  command with no optional keywords sets the port for user login. You must also do the following if the host and service settings are not configured in the user profile:
  After being verified, or authenticated, a login session is established to the host computer.
  In addition to setting an asynchronous port for user login, you can also set it for network dial-in and/or dial-out use by multiple users. Multiple users can dial in to the network through the port from remote locations, dial out from the network through the port to remote locations--like another office or the Internet--or both.
  By using the all  keyword, you can set the port type to user login--and to network dialin , network dialout , or network twoway --for all asynchronous ports simultaneously, as shown in the second example.
 

       set C0|all map

  This command sets the PPP asynchronous map for the interpretation of nonprinting ASCII characters found in the data stream for a single network hardwired asynchronous port, or all network hardwired asynchronous ports.

  set C0|all map Hex

 
 Hex  A 32-bit hexadecimal number. The default is 0x00000000.

  The PPP protocol supports the replacement of nonprinting ASCII data in the PPP stream. These characters are not sent through the line, but instead are replaced by a special set of characters that the remote site interprets as the original characters. The PPP asynchronous map is a bit map of characters that must be replaced. The lowest-order bit corresponds to the first ASCII character NUL, and so on. Most environments set the asynchronous map to 0 (zero) to achieve maximum throughput. This command does not apply to the Serial Line Internet Protocol (SLIP).
  You can set the PPP asynchronous map for all the hardwired asynchronous ports simultaneously by using the set all map  command. The command set C0 map 0 disables the asynchronous mapping.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0|all message

  This command sets the login message to be displayed to the user prior to the login prompt on a single asynchronous port or all asynchronous ports.

  set C0|all message String

 
 String  Login message. The maximum length is 224 characters--or 224 characters minus the login prompt, if set.

  The value for this parameter is a string. Use the caret symbol (^) to designate new lines. It can be helpful to include network identification information in this message.
  You can set the login message for all asynchronous ports simultaneously by using the set all message  command.

  Note ¯ The combined maximum length of the strings in set  C0 message  and set  C0 prompt  must not exceed 224 characters.

 

       set C0|all modem-type

  This command selects an external modem from the modem table.

  set C0|all modem-type ModemName

 
 ModemName  Name of modem from the modem table. The modem name can contain from 0 to 16 characters.

  Before you can select a modem name, you must first define the names and associated parameters in the modem table. (Refer to Table 5-3, "Modem Table Configuration," on page 5-37 for more information.)
  You can set all ports for the same modem type by using the set all modem-type  command.
 

       set C0|all mtu

  This command sets the maximum transmission unit (MTU) for a single network hardwired asynchronous port, or all network hardwired asynchronous ports.

  set C0|all mtu MTU

 
 MTU  Valid values for MTU are between 100 and 1500 bytes.

  The MTU defines the largest frame or packet that can be sent through this port, without fragmentation or discard. A packet that exceeds this value is automatically fragmented if IP, or discarded if IPX. PPP connections have a maximum of 1500 bytes, and SLIP connections have a maximum of 1006. For IPX, the MTU must be set to 1500.
  You can set the MTU for all hardwired asynchronous ports simultaneously by using the set all mtu  command.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0 netmask

  This command sets the IP netmask of the remote router for a network hardwired asynchronous port.

  set C0 netmask Ipmask

 
 Ipmask  IP netmask in dotted decimal notation.

 

       set C0|all network dialin|dialout|twoway

  This command sets a single asynchronous port or all asynchronous ports to provide dial-in network access to multiple remote users, dial-out access for multiple users from the network to remote locations--or both--via PPP or SLIP.

  set C0|all network dialin|dialout|twoway

 
 dialin  The port accepts dial-in-only network connections. When a DCD signal is detected by the PortMaster system, PPP packets are forwarded, and PAP or CHAP authentication is initiated automatically with no prompt for a username or password. Dial-in connections to the network are controlled by the RADIUS server or the user table.
 dialout  The port becomes available for dialing to remote destinations and initiating network connections to those destinations. Dial-out connections from the network are controlled by the location table.
 twoway  The port accepts dial-in connections to the network, as well as being available for dial-out to remote destinations.

  An asynchronous port set for any of these three network uses can also be configured to support user login and/or device sharing concurrently.
  By using the all  keyword, you can set the port type to network dialin , network dialout , or network twoway  for all asynchronous ports simultaneously, as shown in the second example.
 

       set C0|all network hardwired

  This command sets a single asynchronous port or all asynchronous ports for a permanent network connection that requires no dialing or authentication.

  set C0|all network hardwired

  Use this command for ports used in a dedicated or hardwired network connection between two sites. The port immediately begins running the specified protocol. None of the other port types can be combined with network hardwired .
  You can set the port type to network hardwired  for all the asynchronous ports simultaneously by using the set all network hardwired  command.
  You must also set the address of the other end of the network hardwired connection with the set  C0  destination  command.
  set C0 destination - page 5-10
 

       set C0|all ofilter

  This command sets a packet filter for packets exiting the PortMaster on a single network hardwired asynchronous port, or all network hardwired asynchronous ports.

  set C0|all ofilter [Filtername

 
 Filtername  Output filter name that is in the filter table. Maximum of 15 characters.
]

  When this command is specified, all packets being sent from the network hardwired port are evaluated against the rule set for this filter. Only packets permitted by this filter are sent out of the PortMaster.
  You remove the filter by entering the command without a filter name.
  You can set the output filter for all hardwired asynchronous ports simultaneously by using the set all ofilter  command.

  Note ¯ This command is used only on network hardwired asynchronous ports. Dial-in users must use the user table or RADIUS instead. Dial-out locations must use the location table instead.

 

       set C0|all override

  This command sets a single asynchronous port or all asynchronous port parameters as overrideable by the host in Host Device mode.

  set C0|all override xon|rts|speed|parity|databits on|off

 
 xon  Software flow control.
 rts  Hardware flow control.
 speed  Baud rate.
 parity  Parity checking.
 databits  Number of data bits per byte.
 on  Allows the host to override the selected parameter.
 off  Does not allow the host to override the selected parameter. The default is that all overrides are off.

  The PortMaster allows overrides to be set for baud rate, parity, databits, and flow control. This feature allows the host running in.pmd  to alter the active parameters through software control, by using operating system I/O calls (ioctl  calls in UNIX).
  You can set an override parameter for all the asynchronous ports simultaneously by using the set all override  command.
 

       set C0|all parity

  This command sets the parity checking to be used for a single asynchronous port or all asynchronous ports.

  set C0|all parity even|none|odd|strip

 
 even  Set for 7 data bits, 1 stop bit, and even parity.
 none  Set for 8 data bits, 1 stop bit, and no parity bit. This is the default.
 odd  Set for 7 data bits, 1 stop bit, and odd parity.
 strip  Set to strip the parity bit from the data stream when it is received by the PortMaster.

  When strip  is selected, the parity bit is removed upon receipt by the PortMaster. For most purposes, none  must be selected.
  You can set the parity for all the asynchronous ports simultaneously by using the set all parity  command.
 

       set C0|all prompt

  This command sets the user login prompt for a single asynchronous port or all asynchronous ports.

  set C0|all prompt String

 
 String  Login prompt-- maximum is 244 printable ASCII characters, or 244 characters minus the login message, if set. The default is $hostname login: .

  Any printable ASCII characters can be entered. If the string $hostname  is included in the login prompt, the hostname for the port is substituted for the string. Use the caret symbol (^) to designate new lines. The command set  C0  prompt  returns the prompt to its default setting of $hostname login: .
  You can set the prompt for all asynchronous ports simultaneously by using the set all prompt  command.

  Note ¯ The combined maximum length of the strings in set  C0  message and set  C0  prompt must not exceed 224 characters.

 
 

       set C0 protocol

  This command sets the transport protocol for a single network hardwired asynchronous port, or all network hardwired asynchronous ports.

  set C0 protocol slip|ppp

 
 slip  SLIP protocol.
 ppp  PPP protocol.
 x75-sync  X.75 protocol.
|x75-sync

 

       set C0|all rts/cts

  This command sets the use of hardware flow control on a single asynchronous port or all asynchronous ports.

  set C0|all rts/cts on|off

 
 on  Turns on hardware flow control for the port.
 off  Turns off hardware flow control for the port. This is the default.

  This parameter is used by devices that require hardware flow control. When the PortMaster is able to receive data from the attached device, it raises the RTS signal on pin 4 of the RS-232 connector. Output from the PortMaster occurs only if the modem line on pin 5 of the RS-232 connector has CTS raised by the attached device.
  You can set the hardware flow control for all the asynchronous ports simultaneously by using the set all rts/cts  command.
 

       set C0|all security

  This command sets the security level for a single asynchronous port or all asynchronous ports.

  set C0|all security on|off

 
 on  Enables security; disables passthrough logins.
 off  Disables security; enables passthrough logins.
This is the default.

  If security is set to off , any username that is not found in the user table is connected to the port's host for authentication and login.
  If security is set to on , the user table is checked first. Then, if the username is not found and a RADIUS server is configured, RADIUS is consulted. When you are using RADIUS security, this command must be set to on .
  You can set the security for all asynchronous ports simultaneously by using the set all security  command.
 

       set C0|all service_device

  This command sets the device service to be used by a single asynchronous port or all asynchronous ports.

  set C0|all service_device netdata|portmaster|rlogin|telnet [Tport]

 
 netdata  Allows netdata  connections to this port from the network.
 portmaster  Provides host device emulation from a host with the in.pmd  daemon installed. This is the default.
 rlogin  Allows rlogin  connections to this port from the network.
 telnet  Allows telnet  connections to this port from the network.
 Tport  Specifies the TCP port for the connection. Range is from 1 to 65535.

  If the port type is device  or twoway , you can set the device service. This command allows users to connect through the PortMaster to shared devices such as printers or modems.
  You can set the device service for all asynchronous ports simultaneously by using the set all service_device  command.
 

       set C0|all service_login

  This command sets the network service to use in establishing login sessions for a selected asynchronous port, or all asynchronous ports.

  set S0|all service_login|netdata|portmaster|rlogin|telnet [Tport]

 
 netdata  Uses the netdata  login service.
 portmaster  Uses the PortMaster login service to connect to in.pmd  on the login host. This is the default.
 rlogin  Uses remote login to connect to the login host.
 telnet  Uses Telnet to connect to the login host.
 Tport  Specifies the designated TCP port on the host. Range is from
1 to 65535.

  When you set the port type as login  or twoway , you can specify the login service to be used for login sessions.
  You can set the network service for all asynchronous ports simultaneously by using the set all service_login  command.
 

       set C0|all speed

  This command sets the baud rate for a single asynchronous port or all asynchronous ports.

  set C0|all speed [1|2|3] 300|600|1200|2400|4800|9600|19200|
38400|57600|76800|115200

 
 1|2|3  Indicates which of the three baud rates is being set: 1, 2, or 3.
Default is 1.
 300|600, and so on  Indicates the data terminal equipment (DTE) rate. Default is 9600bps.

  Modern modems must be set to run at a fixed rate. To define a fixed rate, lock the DTE rate by setting all three baud rates to the same value.
  You can set the speed for all the asynchronous ports simultaneously by using the set all speed  command.
 

       set C0|all stopbits

  This command sets the number of stop bits in the data frame on a single asynchronous port or all asynchronous ports.

  set C0|all stopbits 1|2

 
 1  1 stop bit. This is the default.
 2  2 stop bits.

  The default of 1 is the most widely used.
  You can set the stop bits for all the asynchronous ports simultaneously by using the set all stopbits  command.
 

       set C0|all termtype

  This command sets the terminal type in the user's environment on a single asynchronous port or all asynchronous ports that are set for user login or two-way operation via the rlogin  or PortMaster login service.

  set C0|all termtype String

 
 String  Terminal type, 0 to 15 characters.

  If the port is set for either login or two-way operation, this terminal type is set in the user's environment when a new session is established to the host. Make sure that the terminal type is valid on the host that the user is connected to with the rlogin  or PortMaster login service.
  You can set the terminal type for all asynchronous ports simultaneously by using the set all termtype  command.
 

       set C0 twoway

  This command sets an asynchronous port for "two-way" operation--both user login and device sharing--or for two-way operation and  remote dial-in and/or dial-out access.

  set C0 twoway Device [network dialin|dialout|twoway]

 
 twoway  The first use of the keyword twoway  sets the port for both user login and device sharing--combining the commands set  C0 login  and set  C0 device .  The second use of the keyword twoway  sets the port to two-way use for both dial-in from remote users and dial-out to remote locations.
 Device  Designation for the device--for example, /dev/ttyp0  or /dev/network .
 dialin  In addition to allowing both user login and device sharing, the port accepts dial-in-only network connections. The remote system is required to enter a username and password. Dial-in connections to the network are controlled by the RADIUS server or the user table.
 dialout  In addition to allowing both user login and device sharing, the port becomes available for dialing to remote destinations and initiating network connections to those destinations. Dial-out connections from the network are controlled by the location table.

  A PortMaster asynchronous port can be configured for several different types of operation. For example, a port set for login users can also be set to access host devices.
 
  This combined inbound and outbound use is called two-way operation. You must also do the following to establish two-way operation:
  If the port type is set to twoway , the port operates in user login mode when a data carrier detect (DCD) signal is detected on pin 8 of the RS-232 connector. Otherwise, it can be accessed as a host device on the computer through in.pmd  or a Telnet session.
  In addition to setting an asynchronous port for user login, you can also set it for network dial-in and/or dial-out use by multiple users. Multiple users can dial in to the network through the port from remote locations, dial out from the network through the port to remote locations--like another office or the Internet--or both.
  set C0 host - page 5-15

  set C0 login - page 5-19

  set C0 network twoway - page 5-34

  set C0 service_device - page 5-30

  set C0 service_login - page 5-31

 

       set C0 username|autolog

  This command sets an automatic login name for the asynchronous port.

  set C0 username|autolog [String

 
 String  Username for automatic login--a maximum of 8 printable ASCII characters.
]

  If this command is used, the user does not receive the standard login prompt. Instead, the PortMaster initiates a session to the default host as if the user had typed String in response to the login prompt.
  To disable the automatic login, use the command set c0 autolog  without a value String .
 

       set C0|all xon/xoff

  This command sets the use of software flow control on a single asynchronous port or all asynchronous ports.

  set C0|all xon/xoff on|off

 
 on  Turns on software flow control for the port. This is the default.
 off  Turns off software flow control for the port.

  The PortMaster uses software flow control, with the ASCII control characters DC1 and DC3, to communicate with the attached device to start and stop the flow of data. Use this command only if Request To Send/Clear To Send (RTS/CTS) flow control is not available on the attached device.
  You can set the software flow control for all the asynchronous ports simultaneously by using the set all xon/xoff  command.
 

       Modem Commands

  The modem table commands in Table 5-3 are used to view and configure the modem table, which stores configuration information for external modems you commonly use.

  Note ¯ ComOS 4.0 and ComOS 4.1 do not support the add modem , delete modem , show table modem , and show modems  commands for external modems. If you are running ComOS 4.0 and ComOS 4.1, you cannot use the commands in this section to configure external modems on asynchronous ports C0 and C1. Instead, you can attach a previously configured modem to the C0 or C1 ports. Although you cannot display the modem's settings with the show modem  command, it will function if properly configured.

  See also the following commands for modems attached to asynchronous ports:
 

  Table 5-3 Modem Table Configuration

 
  Command Syntax     
 add modem ModemName(short) ModemName(long) Speed String  - see page 5-37
 delete modem ModemName(short)  - see page 5-38
 show modem ModemName  - see page 5-39
 show table modem  - see page 5-40

  Note ¯ When the console diagnostic switch is in the left (on) position, the PortMaster 4 does not attempt to configure the modem specified for the console port. This feature allows a terminal to be attached to the console even if a modem was previously attached.

 

       add modem

  This command adds details and configuration information about external modems to the modem table.

  add modem ModemName(short) "ModemName(long)" Speed "String

 
 ModemName(short)  Abbreviated name used to identify the external modem. ModemName  can be up to 16 characters.
 ModemName(long)  Long name that includes modem information--for example, the manufacturer or model name. Enclose the name in quotation marks. Up to a maximum of 64 characters.
 Speed  The DTE speed in bits per second.
 String  The initialization send/expect  string for the modem. Enclose the string in quotation marks. Use a \r  for a carriage return, and a caret (^ ) to separate the send and expect characters in the string. The PortMaster expects OK , as shown in the example.
"

 
  The short and long names are chosen by the user.
 

       delete modem

  This command deletes an external modem from the modem table.

  delete modem ModemName(short)

 
 ModemName(short)  The abbreviated name used to identify the modem when it was added to the modem table.

  Use the modem short name in the command, exactly as it is listed in the output of a show table modem  command.
 
 

       show modem

  This command shows configuration information on individual external modems that are in the modem table.

  show modem ModemName(short)

 
 ModemName(short)  Short name given to the modem when the configuration information was added to the modem table.

  Use the modem short name in the command, exactly as it is listed in the show table modem  response.
 

       show table modem

  This command displays a table listing the external modems currently configured in the modem table.

  show table modem

  The list provides the names of the modems, which can then be used to display details of the modem configuration.
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