Connection reset by peer

Wed May 16 22:45:17 UTC 2007

> -----Original Message-----
> From: redhat-list-bounces at redhat.com 
> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Tom H
> Sent: Wednesday, May 16, 2007 6:08 PM
> To: General Red Hat Linux discussion list
> Subject: Re: Connection reset by peer
> 
> I've managed to replicate this with 2 servers that are in the 
> same vlan, plugged into the same switch. No firewall or 
> suchlike causing the problem.

So client and server are on the same segment?  Hmmm.  Does the mac
address in the RST match the server's nic?  Probably so, just grasping
at straws for you at this point.  Server-side sshd debugging output
didn't help?

> It's very weird, I'm starting to suspect the Tigon drivers 
> for the broadcom BCM5703 card. im going to switch back to the 
> bcm driver and see if it make any difference.

If you're on a Proliant you might try the HP-provided bcm driver that
comes as part of the proliant support pack.  Come to think of it though
I'm not even sure that's available for x86_64.

> However, I have 12 blades running exactly the same build of 
> RHEL4 x86_64, and only 4 servers that are having the problem, 
> and they are in different enclosures.

Truly odd...

> Cheers,
> 
> Tom
> 
> 
> 
> 
> 
> 
> > If it really does turn out that the server is sending an 
> RST, then I'd 
> > start the server with debugging output turned on and look for clues 
> > there.
> >  
> >
> >   
> >> -----Original Message-----
> >> From: redhat-list-bounces at redhat.com 
> >> [mailto:redhat-list-bounces at redhat.com] On Behalf Of Tom H
> >> Sent: Wednesday, May 09, 2007 4:58 PM
> >> To: redhat-list at redhat.com
> >> Subject: ssh: Connection reset by peer
> >>
> >> Hi,
> >>
> >> I have a couple of RHEL4 which have started disconnecting 
> me during 
> >> ssh login after I enter the correct password;
> >>
> >> "Read from remote host msweb01.test.ms.osti.local: 
> Connection reset 
> >> by peer Connection to msweb01.test.ms.osti.local closed."
> >>
> >> I turned on -vvv debugging on the client and the relevant 
> section is;
> >>
> >> debug3: remaining preferred: ,password
> >> debug3: authmethod_is_enabled password
> >> debug1: Next authentication method: password 
> >> txxxxxx at msweb01.test.ms.osti.local's password:
> >> debug3: packet_send2: adding 48 (len 61 padlen 19 extra_pad 64)
> >> debug2: we sent a password packet, wait for reply
> >> debug1: Authentication succeeded (password).
> >> debug1: channel 0: new [client-session]
> >> debug3: ssh_session2_open: channel_new: 0
> >> debug2: channel 0: send open
> >> debug1: Entering interactive session.
> >> debug1: channel 0: free: client-session, nchannels 1
> >> debug3: channel 0: status: The following connections are open:
> >>   #0 client-session (t3 r-1 i0/0 o0/0 fd 4/5 cfd -1)
> >>
> >> debug3: channel 0: close_fds r 4 w 5 e 6 c -1 Read from 
> remote host 
> >> msweb01.test.ms.osti.local: Connection reset by peer Connection to 
> >> msweb01.test.ms.osti.local closed.
> >> debug1: Transferred: stdin 0, stdout 0, stderr 126 bytes in
> >> 0.2 seconds
> >> debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 703.9
> >> debug1: Exit status -1
> >>
> >>
> >> A tcpdump shows that the server is sending a RST, ACK to close the 
> >> connection. The server debug logs has the following;
> >>
> >>
> >> Apr 27 04:08:24 msweb01 sshd[13481]: debug2: monitor_read: 46 used 
> >> once, disabling now Apr 27 04:08:24 msweb01 sshd[13481]: debug2: 
> >> monitor_read: 3 used once, disabling now Apr 27 04:08:24 msweb01 
> >> sshd[13481]: debug2: monitor_read: 4 used once, disabling 
> now Apr 27 
> >> 04:08:24 msweb01 sshd[13481]: debug2: monitor_read: 9 used once, 
> >> disabling now Apr 27 03:08:24 msweb01 sshd[13482]: debug1: 
> >> userauth_banner: sent Apr 27 03:08:24 msweb01 sshd[13482]: Failed 
> >> none for txxxxxx from
> >> 10.127.5.104 port 4460 ssh2
> >> Apr 27 03:08:27 msweb01 sshd[13482]: debug1: userauth-request for 
> >> user txxxxxx service ssh-connection method password Apr 27 
> 03:08:27 
> >> msweb01 sshd[13482]: debug1: attempt 1 failures 1 Apr 27 03:08:27 
> >> msweb01 sshd[13482]: debug2:
> >> input_userauth_request: try
> >> method password
> >> Apr 27 04:08:27 msweb01 sshd[13481]: debug1: PAM: password 
> >> authentication accepted for txxxxxx Apr 27 04:08:27 msweb01 
> >> sshd[13481]: Accepted password for txxxxxx from
> >> 10.127.5.104 port 4460 ssh2
> >> Apr 27 03:08:27 msweb01 sshd[13482]: Accepted password for txxxxxx 
> >> from
> >> 10.127.5.104 port 4460 ssh2
> >> Apr 27 04:08:27 msweb01 sshd[13481]: debug1: 
> monitor_child_preauth: 
> >> txxxxxx has been authenticated by privileged process Apr 
> 27 04:08:27 
> >> msweb01 sshd[13481]: debug2: mac_init: found hmac-md5 Apr 
> 27 04:08:27 
> >> msweb01 sshd[13481]: debug2: mac_init: found hmac-md5 Apr 
> 27 04:08:27 
> >> msweb01 sshd[13481]: debug2: User child is on pid 13484 Apr 27 
> >> 04:08:27 msweb01 sshd[13481]: debug1: do_cleanup Apr 27 04:08:27 
> >> msweb01 sshd[13481]: debug1: PAM: cleanup
> >>
> >>
> >>
> >> Any ideas on what might cause that?
> >>
> >> Thanks,
> >>
> >> Tom
> >>
> >>
> >>
> >>
> >> --
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> >>     
> >
> >   
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