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I've inherited the administration of a linux box in my workplace; it was set up by a colleague who is now gone. Recently, I added a new user to the system, and tried to give her ssh access as well; the way most people who use the machine access it. This, I can't get to work.

Here's what happens:

scmb-bkobe03m:~ xzhang$ ssh -v -X -p 22 arwen@myServer
OpenSSH_5.2p1, OpenSSL 0.9.8r 8 Feb 2011
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to myServer [152.98.xx.xx] port 22.
debug1: Connection established.
debug1: identity file /Users/xzhang/.ssh/identity type -1
debug1: identity file /Users/xzhang/.ssh/id_rsa type 1
debug1: identity file /Users/xzhang/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-6+squeeze2
debug1: match: OpenSSH_5.5p1 Debian-6+squeeze2 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 '[myServer]:22' is known and matches the RSA host key.
debug1: Found key in /Users/xzhang/.ssh/known_hosts:1
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_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/xzhang/.ssh/identity
debug1: Offering public key: /Users/xzhang/.ssh/id_rsa
debug1: Authentications that can continue: publickey
debug1: Trying private key: /Users/xzhang/.ssh/id_dsa
debug1: No more authentication methods to try.

Now, I have of course added her public ssh-key to authorized_keys. So I had a look in /var/log/auth.log and found

Jan  7 11:37:12 sauron sshd[5002]: User arwen from myClientMachine not allowed because not listed in AllowUsers

Which is funny since I did add her to AllowUsers:

daniel@sauron:~$ sudo more /etc/ssh/sshd_config | grep AllowUsers
AllowUsers jonathan daniel rafael simon thomas li arwen

I don't know where to go from here. Any takers?

share|improve this question
have you restarted ssh service after adding user into configuration file. –  Rahul Patil Jan 11 '13 at 7:25
@RahulPatil it's not necessary to restart - sshd rereads it's configuration file on when it receives SIGHUP. –  peterph Jan 11 '13 at 16:37
@peterph yes, i means restart/reload sshd to re-read configuration file. –  Rahul Patil Jan 11 '13 at 17:55
There may be something else in your sshd_config that's relevant, you should post the whole file (suitable anonymized if necessary). –  Gilles Jan 11 '13 at 22:39

1 Answer 1

up vote 1 down vote accepted

If you're absolutely sure that you've restarted the SSH server or told it to reload its configuration file by sending it a SIGHUP…

Maybe the AllowUsers is in a Match section? If there is a previous Match directive, it might cause jonathan, arwen and the others to be only allowed in certain circumstances, as in

Match localhost PasswordAuthentication yes

# Whitelist users who may ssh in
AllowGroups admin
AllowUsers jonathan daniel rafael simon thomas li arwen

(The comment is misleading: these AllowGroups and AllowUsers directives only apply when logging in to localhost. The Match localhost directive should be moved below these.)

share|improve this answer
Egg, meet face. Restarting the system was all it took at this point. Many thanks for the input. –  d.ericsson Jan 14 '13 at 0:49

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