iX 6.5)

50 Chapter3

Telnet Service

Troubleshooting Telnet

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.

Problem Explanation

Unknown service This 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 Telnet

The 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

host

The 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 failure

The 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 host

The 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.