FAQ Search Today's Posts Mark Forums Read
» Video Reviews

» Linux Archive

Linux-archive is a website aiming to archive linux email lists and to make them easily accessible for linux users/developers.

» Sponsor

» Partners

» Sponsor

Go Back   Linux Archive > Debian > Debian ISP

LinkBack Thread Tools
Old 06-30-2010, 05:02 PM
Robert Menger
Default AW: SSH did not work on every IP on debian x64

thanks for the hint

But the result shows that the network shall be perfect:

[~] [18:28:47]|-->: tcptraceroute 22
Selected device eth1, address, port 50066 for outgoing packets
Tracing the path to on TCP port 22 (ssh), 30 hops max
1 vl1.c6500th.keyweb.de ( 0.469 ms 0.322 ms 0.248 ms
2 te1-1.c6500c1.keyweb.de ( 0.246 ms 0.274 ms 0.230 ms
3 vl4006.c6500nw.keyweb.de ( 0.709 ms 0.397 ms 0.306 ms
4 ns.km37111.keymachine.de ( [open] 0.192 ms 0.243 ms 0.188 ms
You have new mail in /var/mail/root
[~] [18:28:57]|-->: ssh
ssh_exchange_identification: Connection closed by remote host

I try strace, but as network-admin I'm not quite familiar with this. When I start the ssh deamon with strace (strace /etc/init.d/sshd start), it shows only the systemcalls while starting, but then strace exits because the startup is finished. When I put strace on one of the PIDs of SSH it ends after some seconds, because the childs start on a new connection as it seems.

What now?

kindly regards

>Hi, Robert.
>Try tcptraceroute . Works as regular traceroute (adding the TCP port you want to probe as the last parameter), but it uses TCP SYN/ACK instead >ICMP, so you can check if any router on the way is blocking the traffic.
>Good luck.
>> Hello,
>> as it seems, there is a problem with some IPs.
>> Problem Description:
>> Debian x64 Lenny 5.04
>> - base install, without any additional packages, only IPs configured
>> - with some special IPs, SSH is not working on Port 22 -> "server unexpectedly closed the network connection"
>> - when we change the SSH port, ssh works
>> - when we change the IP, ssh works on port 22
>> - when we configure this suspicious IP on a completly other server,
>> the same problem occures
>> - we have checked for network problems, but all ACLs are correct, not
>> one switchport or ACL on the core switches is configured for this IP
>> this are the two IPs, where SSH did not work on port 22
>> we have no ideas... we hope you have?
>Diego Rodríguez González
>Ferrocarriles de Via Estrecha
>Dpto. Telecomunicaciones y Sistemas Informáticos
>diego@feve.es (+34)985981778 ext. 99004 / (+34)660574762

To UNSUBSCRIBE, email to debian-isp-REQUEST@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
Archive: CE7FEEDEBABA234A80731C10C268B83311D0A0EF3B@mAiLsTa R.keyweb.org">http://lists.debian.org/CE7FEEDEBABA234A80731C10C268B83311D0A0EF3B@mAiLsTa R.keyweb.org

Thread Tools

All times are GMT. The time now is 01:38 PM.

VBulletin, Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2007, Crawlability, Inc.
Copyright ©2007 - 2008, www.linux-archive.org