[SunHELP] LONG message: cannot telnet in, until an ftp session "wakes it up"

[Peter Stokes]

Hi Logan

One of the common problems with long timeouts on telnet is reverse lookups
of the system you are logging in from on the system you are logging into.
Depends which name service you are using, but check that the 'server' can
resolve the clients IP number to a name.

Just my $0.02

Peter
---------------------------------
Peter Stokes
Ashlyn Computer Services Ltd
Tel: +44 (0)1636-627900
Fax: +44 (0)1636-627909
Mbl: +44 (0)7977-532320
Web: http://www.ashlyn.co.uk
---------------------------------

-----Original Message-----
From: sunhelp-admin at sunhelp.org [mailto:sunhelp-admin at sunhelp.org]On
Behalf Of Stout, Logan
Sent: 21 August 2001 19:05
To: sunhelp at sunhelp.org
Subject: [SunHELP] LONG message: cannot telnet in, until an ftp session
"wakes it up"



We have come across an odd problem at my site, and I am wondering if anyone
has seen it before. we have a bunch of servers that for no apparent reason,
stop responding to telnet/rlogin/rsh etc requests, the machine does respond,
and a connection is established, but thats it. On the console, the output of
netstat -a looks like this (in this example) (also, for what its worth, the
machine names differ somewhat in  some cases, but not all, from the dns
name. but its all in hosts, and these machines have been working normally
for a year or more.) WHat makes theis issue extra weird, is that if you ftp
into the box, then inetd seems to wake up, and you can telnet in again.
Things that might be important, on these machines all telnet ftp and others
that can, are routed through tcpwrappers.

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