Splunk Search

Trouble with time in join

jdmeek
Engager

I have an index with events containing a src_ip but not a username for the event.   I have another index of VPN auth logs that has the assigned IP and username.  But the VPN IPs are randomly assigned.

I need to get the username from the VPN logs where vpn.client_ip matches event.src_ip.  But I need to make sure that the returned username is the one that was assigned during the event. 

In short, I need to get the last vpn client_ip assignment to match the event.src_ip BEFORE the event so the vpn.username would be the correct one for event.src_ip.

Here's a generic representation of my current query but I get nothing back.

index=event ... | join left=event right=vpn where event.src_ip=vpn.client_ip max=1 usetime=true earlier=true [search index=vpn]



  

Labels (1)
0 Karma
1 Solution

MuS
Legend

Hi there,

Take a look at this https://community.splunk.com/t5/Splunk-Search/How-to-compare-fields-over-multiple-sourcetypes-withou... 

Basically, what you need to do is use an eval to normalise the client IP:

| eval clientIp = coalesce(vpn.client_ip,matches event.src_ip)

and use a 'stats ... by clientIp'

Hope this helps ...

cheers, MuS

View solution in original post

0 Karma

MuS
Legend

Hi there,

Take a look at this https://community.splunk.com/t5/Splunk-Search/How-to-compare-fields-over-multiple-sourcetypes-withou... 

Basically, what you need to do is use an eval to normalise the client IP:

| eval clientIp = coalesce(vpn.client_ip,matches event.src_ip)

and use a 'stats ... by clientIp'

Hope this helps ...

cheers, MuS

0 Karma

jdmeek
Engager

Thanks!  

0 Karma
Career Survey
First 500 qualified respondents will receive a $20 gift card! Tell us about your professional Splunk journey.

Can’t make it to .conf25? Join us online!

Get Updates on the Splunk Community!

Can’t Make It to Boston? Stream .conf25 and Learn with Haya Husain

Boston may be buzzing this September with Splunk University and .conf25, but you don’t have to pack a bag to ...

Splunk Lantern’s Guide to The Most Popular .conf25 Sessions

Splunk Lantern is a Splunk customer success center that provides advice from Splunk experts on valuable data ...

Unlock What’s Next: The Splunk Cloud Platform at .conf25

In just a few days, Boston will be buzzing as the Splunk team and thousands of community members come together ...