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Groups > linux.debian.kernel > #78106

Bug#1023563: linux-image-5.10.0-19-amd64: Ephemeral ports are reused too quickly, even when net.ipv4.tcp_tw_reuse = 0

From Markus Wernig <public@wernig.net>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#1023563: linux-image-5.10.0-19-amd64: Ephemeral ports are reused too quickly, even when net.ipv4.tcp_tw_reuse = 0
Date 2023-01-28 21:00 +0100
Message-ID <FSZwJ-1NPK-1@gated-at.bofh.it> (permalink)
References <FoSIO-1SHI-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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Dear maintainer

I just installed linux-image-5.10.0-21-amd64 (5.10.162-1) and tested again.

The problem still exists.

The bug can be reproduced by constantly keeping the connection rate 
between the webserver and backend at around 15/sec. After some time 
(around 5 hours in my last test) the frontend starts reusing ephemeral 
ports even though it is configured not to.

Best

Markus

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Bug#1023563: linux-image-5.10.0-19-amd64: Ephemeral ports are reused too quickly, even when net.ipv4.tcp_tw_reuse = 0 Markus Wernig <public@wernig.net> - 2022-11-06 19:40 +0100
  Bug#1023563: linux-image-5.10.0-19-amd64: Ephemeral ports are reused too quickly, even when net.ipv4.tcp_tw_reuse = 0 Markus Wernig <public@wernig.net> - 2023-01-28 21:00 +0100

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