Ich hatte gerade eben das Problem, dass die bestehende SSH-Verbindung zu meinem vServer gekappt wurde. Als ich anschlieszend probiert habe mich erneut zu verbinden, war dies nicht moeglich.
Nach einem einfachen Neustart das gleiche Bild. Erst nachdem ich den Server gestoppt, eine Weile gewartet und ihn neu gestartet hatte, war ein erneuter Login moeglich.
Andere Dienste liefen waehrenddessen. Der Server liesz sich anpingen, nmap hat die ueblichen offenen Ports (einschl. SSH) angezeigt.
Hat jemand eine Idee, was da los war? Insbesondere irritiert mich der unmittelbare Verbindungsabbruch nachdem der Public Key akzeptiert wurde.
/var/log/auth.log: (gekuerzt, Benutzernamen und IP-Adressen geaendert)
Code
Jan 22 20:17:01 manitu CRON[19835]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 22 20:17:01 manitu CRON[19835]: pam_unix(cron:session): session closed for user root
Jan 22 20:21:01 manitu sshd[21875]: error writing /proc/self/oom_adj: Permission denied
Jan 22 20:21:02 manitu sshd[21875]: Accepted publickey for my_user from 123.45.67.89 port 44198 ssh2
Jan 22 20:21:02 manitu sshd[21875]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 22 21:17:01 manitu CRON[16421]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 22 21:17:01 manitu CRON[16421]: pam_unix(cron:session): session closed for user root
Jan 22 22:17:01 manitu CRON[13336]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 22 22:17:01 manitu CRON[13336]: pam_unix(cron:session): session closed for user root
Jan 22 23:17:01 manitu CRON[12547]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 22 23:17:02 manitu CRON[12547]: pam_unix(cron:session): session closed for user root
Jan 23 00:17:01 manitu CRON[12114]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 23 00:17:01 manitu CRON[12114]: pam_unix(cron:session): session closed for user root
Jan 23 01:07:35 manitu su[29523]: Successful su for my_other_user by root
Jan 23 01:07:35 manitu su[29523]: + pts/3 root:my_other_user
Jan 23 01:07:35 manitu su[29523]: pam_unix(su:session): session opened for user my_other_user by (uid=0)
Jan 23 01:07:38 manitu su[29523]: pam_unix(su:session): session closed for user my_other_user
Jan 23 01:17:01 manitu CRON[2438]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 23 01:17:01 manitu CRON[2438]: pam_unix(cron:session): session closed for user root
Jan 23 01:43:05 manitu sshd[21875]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:17:01 manitu CRON[30836]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan 23 02:17:01 manitu CRON[30836]: pam_unix(cron:session): session closed for user root
Jan 23 02:33:56 manitu sshd[5218]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:33:56 manitu sshd[5218]: Server listening on 0.0.0.0 port 24.
Jan 23 02:34:04 manitu sshd[5423]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:05 manitu sshd[5423]: Accepted publickey for my_user from 123.45.67.89 port 45009 ssh2
Jan 23 02:34:05 manitu sshd[5423]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:05 manitu sshd[5423]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:08 manitu sshd[5436]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:08 manitu sshd[5436]: Accepted publickey for my_user from 123.45.67.89 port 45010 ssh2
Jan 23 02:34:08 manitu sshd[5436]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:08 manitu sshd[5436]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:10 manitu sshd[5445]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:10 manitu sshd[5445]: Accepted publickey for my_user from 123.45.67.89 port 45011 ssh2
Jan 23 02:34:10 manitu sshd[5445]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:11 manitu sshd[5445]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:15 manitu sshd[5470]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:15 manitu sshd[5470]: Accepted publickey for my_user from 123.45.67.89 port 45012 ssh2
Jan 23 02:34:15 manitu sshd[5470]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:15 manitu sshd[5470]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:19 manitu sshd[5483]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:19 manitu sshd[5483]: Accepted publickey for my_user from 123.45.67.89 port 45013 ssh2
Jan 23 02:34:19 manitu sshd[5483]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:20 manitu sshd[5483]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:32 manitu sshd[5577]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:33 manitu sshd[5577]: Accepted publickey for my_user from 123.45.67.89 port 45014 ssh2
Jan 23 02:34:33 manitu sshd[5577]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:33 manitu sshd[5577]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:38 manitu sshd[5602]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:39 manitu sshd[5602]: Accepted publickey for my_user from 123.45.67.89 port 45015 ssh2
Jan 23 02:34:39 manitu sshd[5602]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:39 manitu sshd[5602]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:42 manitu sshd[5617]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:42 manitu sshd[5617]: Accepted publickey for my_user from 123.45.67.89 port 45016 ssh2
Jan 23 02:34:42 manitu sshd[5617]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:42 manitu sshd[5617]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:34:58 manitu sshd[5713]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:34:58 manitu sshd[5713]: Accepted publickey for my_user from 123.45.67.89 port 45017 ssh2
Jan 23 02:34:58 manitu sshd[5713]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:34:58 manitu sshd[5713]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:35:12 manitu sshd[6363]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:35:13 manitu sshd[6363]: Accepted publickey for my_user from 123.45.67.89 port 41755 ssh2
Jan 23 02:35:13 manitu sshd[6363]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:35:13 manitu sshd[6363]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:35:20 manitu sshd[6390]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:35:20 manitu sshd[6390]: Accepted publickey for my_user from 123.45.67.89 port 41756 ssh2
Jan 23 02:35:20 manitu sshd[6390]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:35:20 manitu sshd[6390]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:35:35 manitu sshd[6451]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:35:36 manitu sshd[6451]: Accepted publickey for my_user from 123.45.67.89 port 41759 ssh2
Jan 23 02:35:36 manitu sshd[6451]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:35:36 manitu sshd[6451]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:36:07 manitu sshd[6628]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:36:08 manitu sshd[6628]: Accepted publickey for my_user from 123.45.67.89 port 41770 ssh2
Jan 23 02:36:08 manitu sshd[6628]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:36:08 manitu sshd[6628]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:36:29 manitu sshd[6739]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:36:30 manitu sshd[6739]: Accepted publickey for my_user from 123.45.67.89 port 41778 ssh2
Jan 23 02:36:30 manitu sshd[6739]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:36:30 manitu sshd[6739]: pam_unix(sshd:session): session closed for user my_user
Jan 23 02:54:06 manitu sshd[14843]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:54:06 manitu sshd[14843]: Server listening on 0.0.0.0 port 24.
Jan 23 02:54:08 manitu sshd[15011]: error writing /proc/self/oom_adj: Permission denied
Jan 23 02:54:09 manitu sshd[15011]: Accepted publickey for my_user from 123.45.67.89 port 42722 ssh2
Jan 23 02:54:09 manitu sshd[15011]: pam_unix(sshd:session): session opened for user my_user by (uid=0)
Jan 23 02:54:23 manitu su[15112]: Successful su for root by my_user
Jan 23 02:54:23 manitu su[15112]: + pts/5 my_user:root
Jan 23 02:54:23 manitu su[15112]: pam_unix(su:session): session opened for user root by (uid=1000)
