How to extract multiple hostname from one regex search in globalprotect logs?

[briansarmiento]

Hi everyone,

I'm trying to create a simple list with all the devices found on the logs from globalprotect. The deal is, i'm using rex to match it with regular expressions.  I've already used  regex101.com to double check my search but, when I run it on splunk it fails.

My search:

index="ind_Aaaabbbb" log_subtype="globalprotect" globalprotectgateway-config-succ OR globalprotectgateway-logout-succ
| rex field=_raw (?<device>\w\w\w\w\w\w\s\w\w\w\w:\s+(?:\w+\-\w+\-\w+|\w+))
| table _time, user, event_id, src_ip, device, dvc_name, dvc

The ideal expresions to capture:

Device name: DDD-AAA-BBBBB

Device name: DDDAAABBBBBBB

Error returned by Splunk:

Error in 'SearchParser': Missing a search command before '\'. Error at position '198' of search query 'search index="index" log_subtype="globalpro...{snipped} {errorcontext = -\w+\-\w+|\w+)) | tab}'.

Example data:

SYSTEM,globalprotect,0,2020/11/29,,globalprotectgateway-config-succ,Gateway-XXX-XX-XXX-N,0,0,general,informational,"GlobalProtect gateway client configuration generated. username.5, Private IP: 00.000.000.00, Client version: 5.1.1-12, Device name: DDD-AAA-BBBBB, Client OS version: Microsoft Windows 10 Pro , 64-bit, VPN type: Device Level VPN.",000...,0x0,0,0,0,0,,FW-PA-0000-AAA-CCC-TTTT

SYSTEM,globalprotect,0,2020/11/29 ,,globalprotectgateway-config-succ,Gateway-XXX-XX-N,0,0,general,informational,"GlobalProtect gateway client configuration generated. username.5, Private IP: 00.000.000.000, Client version: 5.1.5-20, Device name: DDDAAABBBBBBB, Client OS version: Microsoft Windows 10 Pro , 64-bit, VPN type: Device Level VPN.",000...,0x0,0,0,0,0,,FW-PA-0000-AAA-CCC-TTTT

[richgalloway · Accepted solution]

I suspect rex doesn't like the embedded pipe character.  Try this query that not only doesn't use a pipe, it's also tons more efficient (51 steps vs. 3250).

(?<device>Device name:\s+\w{3}-?\w{3}-?\w{5,7})

[briansarmiento]

Hi @richgalloway  unfortunately that search didn't help, It stills returning an error. This time its the following

Error in 'rex' command: Encountered the following error while compiling the regex '(?<device>Device': Regex: missing closing parenthesis.

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[richgalloway]

No such error here.  Please share your full query.

[briansarmiento]

Hey @richgalloway , 
here is my full query.

Thanks in Advance for your Help.! (Y)

[richgalloway]

The rex command requires the regex be enclosed in quotation marks.

[briansarmiento]

Perfect, it totally worked. Thank you very much!