Cherry-pick #10029 to 6.6: Handle IPv6 zone id in IIS filebeat ingest pipeline for access logs too #10030
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Cherry-pick of PR #10029 to 6.6 branch. Original message:
This is a manual backport, to fix an issue with the iis module, with regards to IP literals containing an IPv6 zone ID (issue #9836). This was fixed in master as part of the ECS conversion of the iis module (#9955).
Contrary to the fix in master, this fix is in line with Jaime's fix for the IIS error logs (#9869, #9932, #9933). This means the IP literal is saved as is to
iis.access.remote_ip
(including the zone). This is fine, because this is a keyword field. The GeoIP processor then uses an IP literal with the zone stripped out, to avoid hitting the error. Note that this cleaned up field is not kept around in the 6.x line.