Two indexes how to filter with different name fields

[Lorenzo_Allori]

Hi there!

I have two different indexes that have different fields name which are actually the same thing:

For example:
Index 1 has: IPV4_SRC_ADDR : "75.72.214.200"
Index 2 has: source.addr: "75.72.214.200"

I cannot modify the index but I can work on the index pattern. Is there a way that I can create an additional field to filter on to click and get the only results from that ip?

Tried with scripted fields but did not work.

Thanks.

[Patrick_Mueller (Patrick Mueller (Kibana Alerting))]

Can you modify the index mappings? I think you could use a field alias for this: Introducing Field Aliases in Elasticsearch | Elastic Blog

[warkolm (Mark Walkom)]

Not without the suggestion from Patrick, no.

[Lorenzo_Allori]

Hello!

I tried to add it like this:

PUT ntopng-*/_mapping
{
  "properties": {
    "source.ip": {
      "type": "alias",
      "path": "IPV4_SRC_ADDR"
    }
  }
}

Rereshed the index etc, but I coudn't find the field to add it to a visualization (lens). It does not show up even in the discovery view.

Is there a way to find ouy why? Kibana 7.8.0.

n.b. the right name is source.ip non source.addr as stated in first post.