Mailing List Archive

Is this only occurring during debug sessions?

-T

-----Original Message-----
From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com] On Behalf Of Kosala Atapattu
Sent: Saturday, July 24, 2010 11:57 PM
To: secureshell@securityfocus.com
Subject: ssh hangs after SSH2_MSG_SERVICE_ACCEPT

Hi All,

My servers suddenly started giving problem across all the machines.
When I try to connect, the ssh debug output stops near the
SSH2_MSG_SERVICE_ACCEPT and then continues after a minute or so.

root@s2spr1[/home/root] #ssh -v t1was1_nim
OpenSSH_5.2p1, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Failed dlopen: /usr/krb5/lib/libkrb5.a(libkrb5.a.so):
0509-022 Cannot load module /usr/krb5/lib/libkrb5.a(libkrb5.a.so).
0509-026 System error: A file or directory in the path name
does not exist.

debug1: Error loading Kerberos, disabling Kerberos auth.
debug1: Connecting to t1was1_nim [10.1.1.114] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /home/root/.ssh/identity type -1
debug1: identity file /home/root/.ssh/id_rsa type -1
debug1: identity file /home/root/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.2
debug1: match: OpenSSH_5.2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 't1was1_nim' is known and matches the RSA host key.
debug1: Found key in /home/root/.ssh/known_hosts:79
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received

I have not changed anything in these machines. This is just a sudden
move. These servers are on AIX.

--
Kosala
--------------------------------------------
Disclaimer: Views expressed in this mail are my personal views and
they would not reflect views of the employer.
--------------------------------------------
blog.kosala.net
www.linux.lk/~kosala/
www.kosala.net

Hi,

Sorry about the late reply. Finally we figured out the problem to be
with the DNS server. The DNS server could not resolve the hostname of
the server, and it takes about 1 minute to revert to the /etc/hosts
file. The solution we found was to specify the name resolution order
to be first local and then bind, to prevent any further problems.

Thanx for the reply.
Cheers,
Kosala

On Thu, Jul 29, 2010 at 7:04 PM, Rodriguez, Tony
<Tony.Rodriguez@ucsfmedctr.org> wrote:
> Is this only occurring during debug sessions?
>
> -T
>
> -----Original Message-----
> From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com] On Behalf Of Kosala Atapattu
> Sent: Saturday, July 24, 2010 11:57 PM
> To: secureshell@securityfocus.com
> Subject: ssh hangs after SSH2_MSG_SERVICE_ACCEPT
>
> Hi All,
>
> My servers suddenly started giving problem across all the machines.
> When I try to connect, the ssh debug output stops near the
> SSH2_MSG_SERVICE_ACCEPT and then continues after a minute or so.
>
> root@s2spr1[/home/root] #ssh -v t1was1_nim
> OpenSSH_5.2p1, OpenSSL 0.9.8k 25 Mar 2009
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Failed dlopen: /usr/krb5/lib/libkrb5.a(libkrb5.a.so):
> 0509-022 Cannot load module /usr/krb5/lib/libkrb5.a(libkrb5.a.so).
>        0509-026 System error: A file or directory in the path name
> does not exist.
>
> debug1: Error loading Kerberos, disabling Kerberos auth.
> debug1: Connecting to t1was1_nim [10.1.1.114] port 22.
> debug1: Connection established.
> debug1: permanently_set_uid: 0/0
> debug1: identity file /home/root/.ssh/identity type -1
> debug1: identity file /home/root/.ssh/id_rsa type -1
> debug1: identity file /home/root/.ssh/id_dsa type 2
> debug1: Remote protocol version 2.0, remote software version OpenSSH_5.2
> debug1: match: OpenSSH_5.2 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_5.2
> debug1: SSH2_MSG_KEXINIT sent
> debug1: SSH2_MSG_KEXINIT received
> debug1: kex: server->client aes128-ctr hmac-md5 none
> debug1: kex: client->server aes128-ctr hmac-md5 none
> debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> debug1: Host 't1was1_nim' is known and matches the RSA host key.
> debug1: Found key in /home/root/.ssh/known_hosts:79
> debug1: ssh_rsa_verify: signature correct
> debug1: SSH2_MSG_NEWKEYS sent
> debug1: expecting SSH2_MSG_NEWKEYS
> debug1: SSH2_MSG_NEWKEYS received
> debug1: SSH2_MSG_SERVICE_REQUEST sent
> debug1: SSH2_MSG_SERVICE_ACCEPT received
>
> I have not changed anything in these machines. This is just a sudden
> move. These servers are on AIX.
>
> --
> Kosala
> --------------------------------------------
> Disclaimer: Views expressed in this mail are my personal views and
> they would not reflect views of the employer.
> --------------------------------------------
> blog.kosala.net
> www.linux.lk/~kosala/
> www.kosala.net
>
>



--
Kosala
--------------------------------------------
Disclaimer: Views expressed in this mail are my personal views and
they would not reflect views of the employer.
--------------------------------------------
blog.kosala.net
www.linux.lk/~kosala/
www.kosala.net