|
|
|
|
---
|
|
|
|
|
title: Stalled SSH connections
|
|
|
|
|
summary: >
|
|
|
|
|
My pfSense removed valid connections obviosly.
|
|
|
|
|
This is how I solved it.
|
|
|
|
|
<small>The thumbnail was created with Google AI (Imagen 3).</small>
|
|
|
|
|
date: 2024-10-06T19:30:17+02:00
|
|
|
|
|
lastmod: 2024-11-17T11:19:39+0000
|
|
|
|
|
categories:
|
|
|
|
|
- computerstuff
|
|
|
|
|
tags:
|
|
|
|
|
- networking
|
|
|
|
|
- pfSense
|
|
|
|
|
- openssh
|
|
|
|
|
- selfhost
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
I spent some time adjusting my SSH configuration because I often get stalled
|
|
|
|
|
connections to my servers but I never got that fixed until recently, when I
|
|
|
|
|
started looking in my firewall settings on the pfSense.
|
|
|
|
|
|
|
|
|
|
After changing the <kbd>Firewall Optimization Settings</kbd> within
|
|
|
|
|
<kbd>System</kbd> → <kbd>Advanced</kbd> → <kbd>Firewall & NAT</kbd> to
|
|
|
|
|
<kbd>Conservative</kbd> I had no more of these hangs of my SSH sessions.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
I use the `ControlMaster` setting in my SSH configuration so the stalled
|
|
|
|
|
connections have to be killed with something like
|
|
|
|
|
|
|
|
|
|
```console
|
|
|
|
|
$ ssh -O exit {short hostname}
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
every time -- which is annoying.
|
