12.1.2 Debug SSH

20.02.2008

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debug ssh:

/etc/rc.d/init.d/sshd stop
/usr/sbin/sshd -d

ssh -l user localhost.localdomain

ssh daemon activites for a password-less scp:

Connection from 212.35.36.204 port 47059
debug1: Client protocol version 2.0; client software version OpenSSH_2.9p2
debug1: match: OpenSSH_2.9p2 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-1.99-OpenSSH_3.1p1
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug1: dh_gen_key: priv key bits set: 120/256
debug1: bits set: 1585/3191
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug1: bits set: 1582/3191
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user p356d service ssh-connection method none
debug1: attempt 0 failures 0
debug1: Starting up PAM with username "p356d"
debug1: PAM setting rhost to "dubb04h10-0.dplanet.ch"
Failed none for p356d from 212.35.36.204 port 47059 ssh2
debug1: userauth-request for user p356d service ssh-connection method publickey
debug1: attempt 1 failures 1
debug1: test whether pkalg/pkblob are acceptable
debug1: temporarily_use_uid: 502/502 (e=0)
debug1: trying public key file /home/p356d/.ssh/authorized_keys
debug1: restore_uid
debug1: temporarily_use_uid: 502/502 (e=0)
debug1: trying public key file /home/p356d/.ssh/authorized_keys2
debug1: matching key found: file /home/p356d/.ssh/authorized_keys2, line 1
Found matching DSA key: 14:55:3c:33:e1:50:89:75:24:e6:7c:df:23:9d:a0:07
debug1: restore_uid
Postponed publickey for p356d from 212.35.36.204 port 47059 ssh2
debug1: userauth-request for user p356d service ssh-connection method publickey
debug1: attempt 2 failures 1
debug1: temporarily_use_uid: 502/502 (e=0)
debug1: trying public key file /home/p356d/.ssh/authorized_keys
debug1: restore_uid
debug1: temporarily_use_uid: 502/502 (e=0)
debug1: trying public key file /home/p356d/.ssh/authorized_keys2
debug1: matching key found: file /home/p356d/.ssh/authorized_keys2, line 1
Found matching DSA key: 14:55:3c:33:e1:50:89:75:24:e6:7c:df:23:9d:a0:07
debug1: restore_uid
debug1: ssh_dss_verify: signature correct
Accepted publickey for p356d from 212.35.36.204 port 47059 ssh2
debug1: Entering interactive session for SSH2.
debug1: fd 3 setting O_NONBLOCK
debug1: fd 7 setting O_NONBLOCK
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 65536 max 32768
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: init
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request exec reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req exec
debug1: PAM establishing creds
debug1: fd 9 setting O_NONBLOCK
debug1: fd 11 setting O_NONBLOCK
debug1: channel 0: rcvd eof
debug1: channel 0: output open -> drain
debug1: channel 0: obuf empty
debug1: channel 0: close_write
debug1: Received SIGCHLD.
debug1: channel 0: output drain -> closed
debug1: session_by_pid: pid 13627
debug1: session_exit_message: session 0 channel 0 pid 13627
debug1: channel request 0: exit-status
debug1: session_exit_message: release channel 0
debug1: session_close: session 0 pid 13627
debug1: channel 0: read<=0 rfd 9 len 0
debug1: channel 0: read failed
debug1: channel 0: close_read
debug1: channel 0: input open -> drain
debug1: channel 0: ibuf empty
debug1: channel 0: send eof
debug1: channel 0: input drain -> closed
debug1: channel 0: send close
debug1: channel 0: rcvd close
debug1: channel 0: is dead
debug1: channel 0: garbage collecting
debug1: channel_free: channel 0: server-session, nchannels 1
Connection closed by remote host.
Closing connection to 212.35.36.204