Server Logs sehr merkwürdig! Bitte um rat

[Mac_Hack]

Hallo Community,

Ich bin wieder mal stark von euch abhängig () und zur zeit etwas ratlos.

Ich habe gerade eben die Logs meines vServer (Debian 64-bit) überprüft und seeeehr viele komische Einträge gefunden.

Hier mal ein kleiner ausschnitt:

Apr 5 02:02:00 sshd[15548]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:02:00 sshd[15548]: Did not receive identification string from 219.134.191.203
Apr 5 02:09:09 CRON[18333]: pam_unix(cron:session): session opened for user root by (uid=0)
Apr 5 02:09:24 CRON[18333]: pam_unix(cron:session): session closed for user root
Apr 5 02:09:46 sshd[23611]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:09:47 sshd[23611]: Invalid user staff from 219.134.191.203
Apr 5 02:09:47 sshd[23611]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 02:09:47 sshd[23611]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.134.191.203
Apr 5 02:09:49 sshd[23611]: Failed password for invalid user staff from 219.134.191.203 port 43784 ssh2
Apr 5 02:09:50 sshd[23705]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:09:51 sshd[23705]: Invalid user sales from 219.134.191.203
Apr 5 02:09:51 sshd[23705]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 02:09:51 sshd[23705]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.134.191.203
Apr 5 02:09:53 sshd[23705]: Failed password for invalid user sales from 219.134.191.203 port 43891 ssh2
Apr 5 02:09:53 sshd[23799]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:09:55 sshd[23799]: Invalid user recruit from 219.134.191.203
Apr 5 02:09:55 sshd[23799]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 02:09:55 sshd[23799]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.134.191.203
Apr 5 02:09:57 sshd[23799]: Failed password for invalid user recruit from 219.134.191.203 port 43932 ssh2
Apr 5 02:09:57 sshd[23904]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:09:59 sshd[23904]: Invalid user alias from 219.134.191.203
Apr 5 02:09:59 sshd[23904]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 02:09:59 sshd[23904]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.134.191.203
Apr 5 02:10:00 sshd[23904]: Failed password for invalid user alias from 219.134.191.203 port 44043 ssh2
Apr 5 02:10:01 sshd[24556]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:10:03 sshd[24556]: Invalid user office from 219.134.191.203
Apr 5 02:10:03 sshd[24556]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 02:10:03 sshd[24556]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.134.191.203
Apr 5 02:10:05 sshd[24556]: Failed password for invalid user office from 219.134.191.203 port 44112 ssh2
Apr 5 02:10:05 sshd[28605]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 02:10:07 sshd[28605]: Invalid user samba from 219.134.191.203

Das ganze begann am Apr 5 02:02:00 und geht bis Apr 5 15:22:47

Das war der letzte unbekannte Log

Apr 5 15:22:47 sshd[28235]: error writing /proc/self/oom_adj: Operation not permitted
Apr 5 15:22:54 sshd[28235]: Invalid user students from 110.172.156.2
Apr 5 15:22:54 sshd[28235]: pam_unix(sshd:auth): check pass; user unknown
Apr 5 15:22:54 sshd[28235]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.172.156.2
Apr 5 15:22:57 sshd[28235]: Failed password for invalid user students from 110.172.156.2 port 43591 ssh2

Ich habe jetzt den Port für SSH geändert. Wollte trotzdem wissen ob man noch was machen kann?