Forum Discussion
Parsing syslog
Options like:
print SyslogMessage = "Security F180 Block: FWD|UDP|p4|192.168.x,x|67|00:15:5d:0f:c4:01|255.255.255.255|68|bootpc||LAN-2-INTERNET|4017|0.0.0.0|0.0.0.0|0|1|"
| project SyslogMessage
| extend device = extract("Security (.*?)Block:", 1, SyslogMessage)
| extend deviceaction = extract("USER=(.*?)COMMAND", 1, SyslogMessage)
or
print SyslogMessage = "Security F180 Block: FWD|UDP|p4|192.168.x,x|67|00:15:5d:0f:c4:01|255.255.255.255|68|bootpc||LAN-2-INTERNET|4017|0.0.0.0|0.0.0.0|0|1|"
| extend p = split(SyslogMessage, "|")
//| extend cleanp = trim(@"[^\w]+",tostring(p))
| extend pos1 = split(p.[0], " ")
| extend FWactivity = trim(@"[^\w]+",tostring(pos1.[0]))
| extend Device = trim(@"[^\w]+",tostring(pos1.[1]))
| extend DeviceAction = trim(@"[^\w]+",tostring(pos1.[2]))
| extend srcMAC = trim(@"[^\w]+",tostring(p.[5]))
| extend DestPort = trim(@"[^\w]+",tostring(p.[4]))
// etc...
| project-away SyslogMessage , p, pos1
KQL is good at doing parsing like this at execution time.
CliveWatson that is very helpful, tnx
when ingesting the logs to the syslog instead of CEF connector i am very limited due to the small amount of fileds that exists on the syslog table in comparison with the CEF
how can i overcome it?
- CliveWatsonOct 20, 2019Former Employee
CommonSecurityLog | getschema | summarize count(ColumnName) Syslog | getschema | summarize count(ColumnName)I make the difference 152 vs 15 columns of data, are there certain columns you are missing in Syslog? Is the data you require in the Syslog but needs extracting / parsing which is I believe one of the things CEF does for you? BTW, I'm no expert on CEF or Syslog, but keen to understand your use case.
Thanks
- Villagerchan8829Jan 12, 2025Copper Contributor
*Jan 11 23:43:30: %SYS-5-CONFIG_I: Configured from console by admin0001 on vty0 (192.168.10.1)
*Jan 11 23:43:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface Ethernet0/2, changed state to up
Hello CliveWatson May get for advise, I would like to parse syslog message above for example logs. I'm still looking for the document to parse the syslog messages. please help me to guide and how can i parse for like above messages.