Source IP on backend #1472

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opened 2026-04-05 19:29:52 +02:00 by MrUnknownDE · 0 comments

MrUnknownDE commented 2026-04-05 19:29:52 +02:00

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Originally created by @M0nk3yOo on 5/20/2025

Dear community,

I'm looking for a while for a solution to see the original source IP from the connected client, but couldn't find any.

Situation: I've for example an TCP forwarder for SMTP, IMAP etc. to my backend. Goinging through an newt site.
For sure I wanna block malicious clients via fail2ban, doing for example relay tries.
BUT I only can see the newt "coordinators" IP.

Is there a way to solve it? I thought, with RAW TCP, I could achieve this.

Thanks a lot!
M0nk3y

*Originally created by @M0nk3yOo on 5/20/2025* Dear community, I'm looking for a while for a solution to see the original source IP from the connected client, but couldn't find any. Situation: I've for example an TCP forwarder for SMTP, IMAP etc. to my backend. Goinging through an newt site. For sure I wanna block malicious clients via fail2ban, doing for example relay tries. BUT I only can see the newt "coordinators" IP. Is there a way to solve it? I thought, with RAW TCP, I could achieve this. Thanks a lot! M0nk3y

MrUnknownDE closed this issue 2026-04-05 19:29:52 +02:00

MrUnknownDE added the stalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestalestale labels 2026-04-05 19:30:02 +02:00

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No Label stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale stale

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Reference: github/pangolin#1472