I found an old thread from 2018 here, which was not answered:
I tried to use field type “ip” in a GROK rule, but got the error message “not supported”. We use ES 6.8.6 on our ES cluster members.
According to this page (https://www.elastic.co/guide/en/elasticsearch/reference/6.8/ip.html), the type “ip” is nothing special.
Do you have an overview which datatypes are supported in GL? A hint with the GitHub source would be enough for me.
Found this: https://github.com/Graylog2/graylog2-server/blob/master/graylog2-web-interface/src/views/logic/fieldtypes/FieldType.js
The type “ip” is there:
IP: createType('ip', [Properties.Enumerable]),
Now I’m even more confused…