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 Configuring and Managing MPE/iX Internet Services: HP e3000 MPE/iX Computer Systems > Chapter 3 Telnet Service

Troubleshooting Telnet
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This section explains the kinds of errors that may arise regarding the operation of Telnet. The Telnet client user will, in all but one case, be alerted about the problem directly; an error message will appear on the client's terminal. You, as system manager of the host system may receive phone calls from client asking you to investigate the problem.

ProblemExplanation
Unknown serviceThis message will be written to $STDLIST for JINETD.NET.SYS when a Telnet client is unable to find the Telnet entry in the services file. Telnet client users may see a similar message on their terminal, and call you, the system manager of the host, to resolve the problem. Open the services file and make sure that the line telnet 23/tcp exists. If necessary add the line and then reconfigure the Internet daemon. For more information, read "Editing the Services File" earlier in this chapter.
The Telnet client cannot run TelnetThe Telnet client user may not have entered the correct program name at the prompt, which is TELNET.ARPA.SYS. Or, there may be problems with the network.
The Telnet client cannot connect to the hostThe Telnet client user can encounter this problem for one of several reasons:
 

  • The user entered the domain name, IP address, or NS node name incorrectly.

  • The system the client attempted to access does not support Telnet.

  • The network of the system the client attempted to access is not working.

  • The Internet daemon is not running on the system the client tried to access.

There is a host name lookup failureThe Telnet user tried to log on when the network was not running. Or the host system the client tried to access is not configured on the network.
The Telnet client cannot logon to a hostThe Telnet client successfully established a connection to the host, but could not logon. The user may call you, as host system manager, to verify that the logon account and passwords are correct and to see if the system limits are set such that new Telnet sessions are prohibited.
The Telnet server cannot run an applicationThe Telnet client successfully established a Telnet connection and logs on to the host system. But, when the user runs the application, the software behaves oddly or it produces error messages. If you receive a call about this problem, you or the user can consult the Asynchronous Serial Communications Programmer's Reference Manual to see if the application is attempting to use file system instrinsics that the Telnet server doesn't support. Or have the user and his or her system manager check the set and toggle values on their system to make sure they are the values required by the application.
Invalid commandThe Telnet client user entered an invalid command at the Telnet prompt. Type a question mark (?) to display a list of valid commands.



Configuring Telnet Server
  		 


Implementation Differences  
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