Learning Linux System Administration
Where would someone go to learn Linux System Administration?
Are the Redhat courses worthwhile?
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S Mar14 0:00 /usr/sbin/named -u named -t /var/named/chroot dmorg 26360 0.0 0.1 2264 872 pts/2 T 20:40 0:00 sh -c (cd /usr/share/man && (echo ".ll 14.2i"; echo ".pl 1100i"; /usr/bin/gunzip -c '/usr/share dmorg 26361 0.0 0.1 2264 512 pts/2 T 20:40 0:00 sh -c (cd /usr/share/man && (echo ".ll 14.2i"; echo ".pl 1100i"; /usr/bin/gunzip -c '/usr/share - Then I found a user called 'pma' in the /home directory, which I had never created. I could not find any suspicious files in the user's directory - I finally spotted the point of breach in /var/log/messages: Code: Mar 15 15:05:25 xxxxxxxxx passwd(pam_unix)[28121]: password changed for root Mar 15 15:06:34 xxxxxxxxx su(pam_unix)[30182]: session opened for user news by (uid=0) Mar 15 15:07:16 xxxxxxxxx su(pam_unix)[30182]: session closed for user news Mar 15 15:22:04 xxxxxxxxx sshd[20118]: Listener created on port 22. Mar 15 15:22:04 xxxxxxxxx sshd[20119]: Daemon is running. Mar 15 15:28:01 xxxxxxxxx su(pam_unix)[32568]: session opened for user pma by (uid=0) Mar 15 15:28:45 xxxxxxxxx su(pam_unix)[32568]: session closed for user pma Somehow they had gotten in as root and then opened sessions for news and pma. - This morning I finally found where the hacker's files are hiding. He had created a new user overnight and a directory in there called "...". 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[root@xxxxxxxxx ...]# ls -al total 420 drwxr-xr-x 2 1004 1004 1024 Dec 17 08:57 . drwxr-x--- 8 root root 1024 Mar 16 15:48 .. -rwxr-xr-x 1 1004 1004 141817 Sep 3 2001 init -rw-r--r-- 1 1004 1004 113482 Mar 15 15:09 log -rw------- 1 1004 1004 640 Feb 18 05:34 messages -rw-r--r-- 1 1004 1004 664 Feb 27 01:12 muhrc -rwxr-xr-x 1 1004 1004 165596 Nov 2 2004 pico -rw------- 1 1004 1004 5 Mar 15 15:09 pid [root@xxxxxxxxx ...]# - Here's what's in the log file: Code: [root@xxxxxxxxx ...]# less log [Thu 08 May 08:03:27] + ---------- NEW SESSION ---------- [Thu 08 May 08:03:27] + muh version 2.05d - starting log... [Thu 08 May 08:03:27] + listening on port 6667. [Thu 08 May 08:03:27] + muh's nick is 'StefanG'. [Thu 08 May 08:03:27] + trying server 'geneva.ch.eu.undernet.org' on port 6667... [Thu 08 May 08:03:28] + tcp-connection to 'geneva.ch.eu.undernet.org' established! [Thu 08 May 08:03:29] + connected to 'Geneva.CH.EU.Undernet.org'. [Thu 08 May 08:03:30] + caught client from 'pcp02588223pcs.shlb1201.mi.comcast.net'. [Thu 08 May 08:03:45] + authorization successful! [Thu 08 May 08:03:45] + reintroducing channels... [Thu 08 May 08:07:54] + ---------- NEW SESSION ---------- [Thu 08 May 08:07:54] + muh version 2.05d - starting log... [Thu 08 May 08:07:54] + listening on port 6667. [Thu 08 May 08:07:54] + muh's nick is 'StefanG'. [Thu 08 May 08:07:54] + trying server 'eu.undernet.org' on port 6667... [Thu 08 May 08:07:55] + tcp-connection to 'eu.undernet.org' established! [Thu 08 May 08:08:05] + connected to 'Diemen.NL.EU.Undernet.org'. [Thu 08 May 08:08:05] + caught client from 'pcp02588223pcs.shlb1201.mi.comcast.net'. [Thu 08 May 08:08:05] + authorization successful! [Thu 08 May 08:08:05] + reintroducing channels... There is a whole lot of these in that log file, and the timestamps look odd. I am not sure what all this is. - This is where I am at right now. Can you guys help figure this thing out? 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I installed system integrity monitor problem It says: [05/29/07 21:35:15]: HTTP service is online. [05/29/07 21:35:15]: HTTP url request failed, assuming offline. [05/29/07 21:35:15]: HTTP offline, restart limit exceeded. How do i increase this so called restart limit? System integrity monitor on server.dealsreferals.com has taken action in responce to an event. Recent event logs are enclosed below for your inspection. There has been 23 events today, if an average of 1000 events is reached, e-mail alerts will be terminated for the duration of the day. - Events Summary: Total event count: 23 Average event count: 2 - Service Summary: FTP [online - 0 events] HTTP [offline - 11 events] DNS [online - 1 1 events] SSH [restarted - 1 events] MYSQL [restart failed - 1 events] XINET [restarted - 1 events] - System Summary: LOAD [25.71 - status good - 17 events] NETWORK [eth0 - online - 0 events] - SIM Log: [05/29/07 21:30:12]: XINET service is online. [05/29/07 21:35:15]: LOAD 25.71 (status good) [05/29/07 21:35:15]: NETWORK is online. [05/29/07 21:35:15]: FTP service is online. [05/29/07 21:35:15]: Error in http.chk, $LPATH_NT not found. [05/29/07 21:35:15]: HTTP service is online. [05/29/07 21:35:15]: HTTP url request failed, assuming offline. [05/29/07 21:35:15]: HTTP offline, restart limit exceeded. [05/29/07 21:35:15]: DNS service is online. [05/29/07 21:35:15]: SSH service is offline. [05/29/07 21:35:15]: Restarted SSH service (1 SSH events today). [05/29/07 21:35:15]: MYSQL service is offline. [05/29/07 21:35:15]: MYSQL restart failed, could not find /etc/init.d/mysqld. [05/29/07 21:35:15]: XINET service is offline. [05/29/07 21:35:15]: Restarted XINET service (1 XINET events today). - System Log: May 29 21:35:48 server smartd[2510]: smartd received signal 15: Terminated May 29 21:35:49 server smartd: smartd shutdown failed May 29 21:35:54 server xinetd[14167]: Exiting... May 29 21:35:54 server xinetd: xinetd shutdown succeeded May 29 21:35:54 server bandmin: Shutting down bandmin: May 29 21:36:01 server bandmin: [60G May 29 21:36:01 server bandmin: May 29 21:36:01 server rc: Stopping bandmin: succeeded May 29 21:36:05 server sshd: Stopping sshd failed May 29 21:36:06 server acpid: acpid shutdown succeeded May 29 21:36:07 server crond: crond shutdown succeeded May 29 21:36:07 server autofs: Stopping automount: May 29 21:36:08 server sshd: succeeded May 29 21:36:12 server xinetd: xinetd shutdown failed May 29 21:36:16 server xinetd: xinetd startup succeeded =============================================================================== SIM 2.5-3 <sim@r-fx.org> 05/29/07 21:35:15
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