topic a strange problem about telnet in Operating System - HP-UX

a strange problem about telnet

Fred.Wu — Thu, 10 Jul 2003 01:11:20 GMT

The rp5470 server always panic at a telnet request, that is, whenever any client telnet the server, server will crash immediately.
The panic output is various every time.
Even telnet to loopback ip will cause down.

But I tried rlogin, ftp, everything's ok.
Any one have idea for this problem except re-install the OS. many thanks.

Fred

Re: a strange problem about telnet

James Murtagh — Thu, 10 Jul 2003 01:20:49 GMT

Hi,

The other commands are using deal with totally different code...do you have a crash dump? Its normally located in /var/adm/crash if you've not changed this. If you have, check the INDEX file in the crash directory to ensure all files are there....cd to the crash directory then post the output of:

# ied q4
q4> trace -u event 0

Regards,

James.

Re: a strange problem about telnet

Patrick Wallek — Thu, 10 Jul 2003 01:50:35 GMT

It's very interesting that telnet would cause this. What version of the OS are you running?

Here's a ll for telnetd on an 11.0 system:

# ll /usr/lbin/telnetd
-r-xr--r-- 1 bin bin 94208 Mar 27 2002 /usr/lbin/telnetd*

# what /usr/lbin/telnetd
/usr/lbin/telnetd:
Copyright (c) 1983, 1986 Regents of the University of California.
Patch ID: PHNE_26096
telnetd.c $Revision: 1.29.214.16 $ $Date: 2000/06/08 23:40:02 $
telnetd.c 5.31 (Berkeley) 2/23/89
authenc.c 8.1 (Berkeley) 6/4/93

Here is the same for telnetd on an 11i system:

# cd /usr/lbin
# ll telnetd
-r-xr--r-- 1 bin bin 90112 Jul 2 2001 telnetd*
# what telnetd
telnetd:
Copyright (c) 1983, 1986 Regents of the University of California.
Patch ID: PHNE_24131

I suggest you compare these to your system and if necessary load the appropriate networking patch and see if that helps.

I don't think it's necessary to reinstall the OS just yet.

Re: a strange problem about telnet

T G Manikandan — Thu, 10 Jul 2003 02:17:35 GMT

First check your /var/adm/syslog/syslog.log file.

It should give you the errors

REvert

Re: a strange problem about telnet

Fred.Wu — Thu, 10 Jul 2003 02:38:30 GMT

It's a 11.0 system , I checked telnetd but find it's no problem.
Fortunately , I can backup my data and re-installed the system. now it's ok .
Anyway ,thanks everyone help me. :)

Fred