azure front door x-forwaded-for

[pankajmyt]

our api runs behind frontdoor .

https://echo.labstack.com/docs/ip-address

this picks right most. however azure frontdoor is inverse of it.

can you provide an option to pick from left/right depending on config.

[FrancoTampieri]

My 2 cents:

Would be better if u provide a sample, to have a case. For example I didn't have experience with Azure platforms so I don't know how frontdoor works.

Regards

[pankajmyt]

So echo ip address picks right most ip. whereas azure,
does clientip, proxy1 ip, internal container app env.
so if I use the xff extractor it gives proxy2 ip.

where as if you see
https://expressjs.com/en/guide/behind-proxies.html

this picks left most ip, so works

[aldas]

you could create custom IPExtrator

echo/ip.go

Line 213 in 98ca08e

type IPExtractor func(*http.Request) string

and set to echo.IPExtractor

echo/echo.go

Line 99 in 98ca08e

IPExtractor IPExtractor

[pankajmyt]

I have, but if xff extractor could support trusting from left/right. that will be great.