debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: client->server aes128-ctr hmac-sha1 none [preauth]
debug1: kex: server->client aes128-ctr hmac-sha1 none [preauth]
debug1: expecting SSH2_MSG_KEXDH_INIT [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user root service ssh-connection method publickey [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: test whether pkalg/pkblob are acceptable [preauth]
debug1: PAM: initializing for "root"
debug1: PAM: setting PAM_RHOST to "hostname"
debug1: PAM: setting PAM_TTY to "ssh"
debug1: temporarily_use_uid: 0/0 (e=0/0)
debug1: trying public key file /root/.ssh/authorized_keys
debug1: fd 4 clearing O_NONBLOCK
debug1: matching key found: file /root/.ssh/authorized_keys, line 1 RSA 80:b6:e0:3c:63:fc:0a:10:ce:da:e5:fe:b7:a5:2c:ff
debug1: restore_uid: 0/0
Postponed publickey for root from XXX.XX.XX.XX port 41772 ssh2 [preauth]
Connection closed by XXX.XX.XX.XX [preauth]
debug1: do_cleanup [preauth]
debug1: do_cleanup
debug1: PAM: cleanup
debug1: Killing privsep child 1440