What would cause incoming TELNET connections to be slow and appear to hang when starting - sometimes waiting over a minute before the username prompt is displayed?
This is probably happening because by default the TELNET server
will attempt try to find the host name of the client and use it
when setting the remote port information (ACCPORNAM) for the process.
(This shows up when you do a SHOW SYSTEM and in the accounting
file.) Looking up the host name could take some time especially
if there are network problems, problems with name servers, or
if DNS is improperly configured.
You can disable the lookup and have the TELNET server use the
client IP address for the remote port information by setting bit
8 of the TELNETD_FLAGS logical. You can add the following line
to your TCPWARE_CONFIGURE.COM to set this.
$ TELNETD_FLAGS == 256
For more information on the TCPWARE_TELNETD_FLAGS logical refer to the "Telnet - OpenVMS Management" chapter of the TCPware Management Guide .