When logging in to one of my servers over ssh, it just hangs after authentication. This is the output on the client with
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to host1 [10.6.27.64] port 22. debug1: Connection established. debug1: identity file /home/user/.ssh/identity type -1 debug1: identity file /home/user/.ssh/id_rsa type 1 debug1: identity file /home/user/.ssh/id_dsa type -1 debug1: loaded 3 keys debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.3 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 'host1' is known and matches the RSA host key. debug1: Found key in /home/user/.ssh/known_hosts:172 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 debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password debug1: Next authentication method: gssapi-with-mic debug1: Unspecified GSS failure. Minor code may provide more information No credentials cache found debug1: Unspecified GSS failure. Minor code may provide more information No credentials cache found debug1: Unspecified GSS failure. Minor code may provide more information No credentials cache found debug1: Next authentication method: publickey debug1: Trying private key: /home/user/.ssh/identity debug1: Offering public key: /home/user/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: read PEM private key done: type RSA debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug1: Entering interactive session. debug1: Sending environment. debug1: Sending env LANG = C debug1: Sending env LC_ALL = C Last login: Wed May 21 10:24:14 2014 from host2 This machine has been configured with kickstart host1 in bcinf17 in bay 3 in rack D10-Mid
/var/log/secure on the server I see this (lucky I still have a session open):
May 21 10:27:31 host1 sshd: Accepted publickey for user from 220.127.116.11 port 34135 ssh2 May 21 10:27:31 host1 sshd: pam_unix(sshd:session): session opened for user user by (uid=0)
So nothing obvious going wrong. The client and server seem able to communicate. Nothing in
Plenty of disk space. Some paths are mounted (including home areas), but my still active shell can access them OK.
I can connect to other servers; only this one has the problem. I have tried restarting
sshd. The config file for
sshd looks like the default, so nothing in there. As far as I know, nothing has changed recently.
Trying to run a command (
ssh host1 -t bash, or
-t vi) also seem to hang, so don't think it's anything to do with my login scripts.
Have also tried logging in from other hosts in the same location and other locations, or from Windows via Putty, and logging in using password instead of key.
Not sure where else to look or what else to try.
This is a RHEL 6.4 server, 64 bit.