How to extract a string from a field using Splunk Regex?

[deepaksn1214]

I m having a hard time trying to extract a string from a field from a splunk search using splunk regex , can someone help pls ? 

The field looks like client_info=xxx-yyy=aaaa-bbb-cccc::4.144.1::web-app-id::plugin-id

I just want the string web-app-id and plugin-id extracted in separate fields named WebApp and Plugin. 

Appreciate any help on this , thanks in advance ! 

[ITWhisperer]

| rex "::(?<WebApp>[^:]+)::(?<Plugin>[^:]+)$"