topic Re: Help with props.conf? in All Apps and Add-ons

Help with props.conf?

kiran331 — Tue, 29 Sep 2020 19:25:09 GMT

Hi,

I'm trying to extract a fields using props.conf,it's not working as expected.Is there a better way to extract them?

event:
May 4 13:37:50 abcd fdf: Protocol: TCP, SrcIP: 111.111.111.12, OriginalClientIP: ::, DstIP: 110.112.113.114, SrcPort: 56896, DstPort: 80, TCPFlags: 0x0, IngressZone: INSIDE, EgressZone: OUTSIDE, DE: Primary Detection Engine (dsdsdasdsda), Policy: C_POLICY, ConnectType: Start, AccessControlRuleName: inside to outside, AccessControlRuleAction: Allow, Prefilter Policy: r_Prefilter, UserName: No Authentication Required, UserAgent: Mozilla/5.0 (compatible; MSIE 8.0;), Client: Internet Explorer, ClientVersion: 8.0, ApplicationProtocol: HTTP, InitiatorPackets: 3, ResponderPackets: 1, InitiatorBytes: 394, ResponderBytes: 66, NAPPolicy: Balanced Security and Connectivity, DNSResponseType: No Error, Sinkhole: Unknown, ReferencedHost: splunk.com, URLCategory: Business and Economy, URLReputation: Well known, URL: http://splunk.com/

To the add-on props, I added field 'rule' fro extraction, its not working.

[cisco:ftd]
SHOULD_LINEMERGE = 0
TIME_FORMAT = %b %d %H:%M:%S
category = Network & Security
description = Output produced by the Cisco Firepower Thereat Defense (FTD) Firew all
pulldown_type = 1
EXTRACT-AccessControlRuleName = AccessControlRuleName:\s(?(.*?))(,|\z)

EXTRACT-SrcIP = SrcIP:\s(?(.*?))(,|\z)

EXTRACT-DE = DE:\s(?(.*?))(,|\z)

EXTRACT-DNSResponseType = DNSResponseType:\s(?(.*?))(,|\z)

EXTRACT-DstIP = DstIP:\s(?(.*?))(,|\z)

Re: Help with props.conf?

xpac — Fri, 04 May 2018 14:22:29 GMT

Hey, you're regexes are good, but need to contain "named capture groups". The name of such a capture group will determine the field name in Splunk.

I fixed your regex for SrcIP, see this regex101 link, it will help you fix your other regexes accordingly:
https://regex101.com/r/1QfM2q/1

But: shouldn't that app you're using already extract those fields?

Re: Help with props.conf?

kiran331 — Fri, 04 May 2018 14:27:11 GMT

Its working for other fields, I added AccessControlRuleName and its not working

Re: Help with props.conf?

xpac — Fri, 04 May 2018 14:32:06 GMT

If you're comparing your regexes you will see that the regex for that field is missing a single character 😉

Re: Help with props.conf?

amitm05 — Fri, 04 May 2018 15:20:41 GMT

Try this.

AccessControlRuleName:\s(?(.*?))(,|\z)