CentOS

Owned by Nadav Razam (Unlicensed)
Last updated: Dec 11, 2023 by Eran
2 min read

Background

The Linux for CentOS Servers logs analysis App automatically Collect - Read - Parse - Analyzes - Reports all machine generated log data of the server and presents a comprehensive set of graphs and reports to analyze machine generated data. Use a predefined set of dashboards and widgets to visualize and address the system software, code written, and infrastructure during development, testing, and production. This Linux for CentOS logs analysis App helps measure, troubleshoot, and optimize your servers integrity, stability and quality with the several visualization and investigation dashboards.

Steps:

  1. The CentOS App is running on messages/syslog, auth/secure, mail, kern, cron and audit standard logs.
    When adding/editing the logs to XpoLog it is mandatory to apply the correct log type(s) to each of the logs:

    1. centos - all logs that the application will analyze must have centos as a log type.

    2. linux - all logs that the application will analyze must have linux as a log type.

    3. messages - only the messages/syslog logs must also be configured to have messages as a log type.

    4. secure - only the secure logs must also be configured to have auth as a log type.

    5. cron - only the cron log must also be configured to have cron as a log type.

    6. maillog - only the mail log must also be configured to have mail as a log type.

    7. kernel - only the kern log must also be configured to have kernel as a log type.

    8. audit - only the audit log must also be configured to have audit as a log type.

    9. dnf - only the dnf log must also be configured to have dnf as a log type.

    10. ufw - only the ufw log must also be configured to have ufw as a log type.



  2. Once the required information is set, on each log click next and edit the log pattern, this step is crucial to the accuracy and deployment of the Amazon AMI App. Use the following patterns for each of the logs:

    1. CentOS messages log:
      First Pattern:
      {date:Date,MMM dd HH:mm:ss} {text:source,ftype=source} {text:process name,ftype=process;,}: [{text:time-taken,ftype=time-taken;,}] {text:Message,ftype=message}
      Second Pattern:
      {date:Date,MMM dd HH:mm:ss} {text:source,ftype=source} {text:process name,ftype=process;,}{block,start,emptiness=true}[{text:pid,ftype=pid}]{block,end,emptiness=true}:{regexp:User,ftype=accountid;refName=message,([passed|failed|closed|opened] for user |password for invalid user |password for |USER=| user \u0027| user )[XPLG_PARAM([^\s\.\u005D\u0027]+)].*}{regexp:Sourceip,ftype=sourceip;refName=Message,(\d+\.\d+\.\d+\.\d+).*} {text:Message,ftype=message;,}


    2. CentOS secure log:
      {date:Date,MMM dd HH:mm:ss} {text:source,ftype=source} {text:process name,ftype=process;,}{block,start,emptiness=true}[{text:pid,ftype=pid}]{block,end,emptiness=true}:{regexp:User,ftype=accountid;refName=message,([passed|failed|closed|opened] for user |changed password expiry for\s|password for invalid user |password for |password changed for\s|USER=|User unknown:\s|unknown user:\s|user \u0027|user=|user | user:\sname=)[XPLG_PARAM([^\s\.\u005D\u0027\,\u003A\u0028]+)].*}{regexp:Sourceip,ftype=sourceip;refName=Message,(\d+\.\d+\.\d+\.\d+).*}{regexp:Group,ftype=group;refName=Message,(group\s'|group:\sname=|group added.*name=)[XPLG_PARAM([^'\s,]+)].*} {regexp:uid,ftype=uid;refName=Message,uid=([^\s\u0029]+).*}{regexp:rhost,ftype=rhost;refName=Message,rhost=([^\s]+),*}{text:Message,ftype=message;,}


    3. CentOS cron log:
      {date:Date,MMM dd HH:mm:ss} {text:Server,ftype=server} {text:Process,ftype=process}{block,start,emptiness=true}[{text:pid,ftype=pid}]{block,end,emptiness=true}: {text:Message,ftype=message}


    4. CentOS mail log:
      {date:Date,MMM dd HH:mm:ss} {text:source,ftype=source} {text:process name,ftype=process;,}{block,start,emptiness=true}[{number:process id}]{block,end,emptiness=true}: {regexp:session,refName=Message;ftype=session,^(\w+):}{regexp:From,refName=Message;ftype=from,\s+from=\u003C?([^\u003E,]+)}{regexp:To,refName=Message;ftype=to,\s+to=\u003C?([^\u003E,]+)}{regexp:Size,refName=Message;ftype=size,size=([^\s,]+).*}{regexp:Class,refName=Message;ftype=class,class=([^\s,]+).*}{regexp:nrcpts,refName=Message;ftype=nrcpts,nrcpts=([^\s,]+).*}{regexp:msgID,refName=Message;ftype=msgid,msgid=<([^>]+).*}{regexp:Proto,refName=Message;ftype=protocol,proto=([^\s,]+).*}{regexp:Stat,refName=Message;ftype=status,stat=([^\s,]+).*}{regexp:Relay,refName=Message;ftype=relay,relay=([^\s,]+).*}{string:Message,ftype=message;,}


    5. CentOS kernel log:
      {date:Date,MMM dd HH:mm:ss} {text:source,ftype=source} {text:process name,ftype=process;,}:{block,start,emptiness=true} [{text:time-taken,ftype=time-taken;,}]{block,end,emptiness=true} {text:Message,ftype=message}


    6. CentOS audit log:
      First Pattern:
      type={text:Type,ftype=eventid}{map:Event Description,ftype=eventdescription;refIndex=0,file:knowledge/repository/system/linux/map/linux-audit.prop}{map:Category,ftype=category;refIndex=0,file:knowledge/repository/system/linux/map/linux-audit-categories.prop} msg=audit({timestamp:Date,yyyy-MM-dd HH:mm:ss.SSS}:{text:Message ID}): {properties:values,keysSep==;propSep=space;,pid#_#ftype=pid#_#name=PID;uid#_#name=UID;auid#_#ftype=auid;old-auid#_#ftype=oldauid#_#name=Old auid;ses#_#ftype=sessionid#_#name=Sessionid;sub;tty;old-ses;res;proctitle;arch;syscall;success;exit;items}msg=''{properties:msg,keysSep==;propSep=space;,op#_#ftype=op#_#name=OP;exe#_#ftype=exe;hostname#_#ftype=machine#_#name=Hostname;addr#_#ftype=sourceip;terminal#_#ftype=terminal#_#name=Terminal;res#_#ftype=status#_#name=Status;acct#_#ftype=accountid;fp#_#ftype=fp;kind#_#ftype=kind;direction#_#ftype=direction;spid#_#ftype=spid;suid#_#ftype=suid;rport#_#ftype=rport#_#name=Rport;port#_#ftyperport#_#name=Port;comm#_#ftype=comm;unit#_#ftype=unit;id#_#ftype=uid#_#name=ID}''{regexp:New Name,ftype=newname;refName=OP,new name:\s+([^\s]+).*}{regexp:New GID,ftype=newgid;refName=OP,new gid:\s+(\d+)}{regexp:Operation,ftype=operation;refName=OP,([^\u003B]+).*}
      Second Pattern:
      type={text:Type,ftype=eventid}{map:Event Description,ftype=eventdescription;refIndex=0,file:knowledge/repository/system/linux/map/linux-audit.prop}{map:Category,ftype=category;refIndex=0,file:knowledge/repository/system/linux/map/linux-audit-categories.prop} msg=audit({timestamp:Date,yyyy-MM-dd HH:mm:ss.SSS}:{text:Message ID}): {properties:values,keysSep==;propSep=space;,pid#_#ftype=pid#_#name=PID;uid#_#name=UID;auid#_#ftype=auid;old-auid#_#ftype=oldauid#_#name=Old auid;ses#_#ftype=sessionid#_#name=Sessionid;sub;tty;old-ses;res;proctitle;arch;syscall;success;exit;items;acct#_#ftype=accountid;exe#_#ftype=exe;hostname#_#ftype=machine#_#name=Hostname;addr#_#ftype=sourceip;terminal#_#ftype=terminal#_#name=Terminal;subj;msg;grantors;op#_#ftype=op#_#name=OP;fp#_#ftype=fp;kind#_#ftype=kind;direction#_#ftype=direction;spid#_#ftype=spid;suid#_#ftype=suid;rport#_#ftype=rport#_#name=Rport;port#_#ftyperport#_#name=Port;comm#_#ftype=comm;unit#_#ftype=unit}{regexp:New Name,ftype=newname;refName=OP,new name:\s+([^\s]+).*}{regexp:New GID,ftype=newgid;refName=OP,new gid:\s+(\d+)}{regexp:Operation,ftype=operation;refName=OP,([^\u003B]+).*}{regexp:Status,ftype=status;refName=res,(\w+).*} 


    7. CentOS dnf log:
      {date:Date,yyyy-MM-dd'T'HH:mm:ssZ} {priority:Priority,ftype=priority,INFO;NOTICE;WARN;WARNING;DEBUG;DDEBUG;SUBDEBUG;CRITICAL} {string:Message,ftype=message}


    8. CentOS ufw log:
      {date:Date,MMM dd HH:mm:ss} {text:Hostname.ftype=hostname} {text:Process,ftype=process}: [{text:Kernel Time,ftype=kerneltime}] [{text:LogPrefix,ftype=logprefix}] {properties:Message,keysSep==;propSep=space;,IN#_#ftype=interfacein;OUT#_#ftype=interfaceout;MAC#_#ftype-mac;SRC#_#ftype=sourceip;DST#_#ftype=targetip;LEN#_#ftype=length#_#name=Payload Length;TOS#_#ftype=servicetype#_#name=Type Of Service;PREC#_#ftype=precedence#_#name=Precedence;TTL#_#ftype=ttl;ID#_#ftype=id#_#name=Identification;PROTO#_#ftype=protocol;SPT#_#ftype=sourceport#_#name=SourcePort;DPT#_#ftype=targetport#_#name=TargetPort;WINDOW#_#name=windowssize;RES#_#ftype=flags#_#name=TCP Flags;URGP}