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---
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title: Stalled SSH connections
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summary: >
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My firewall removed valid connections obviosly.
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This is how I solved it.
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date: 2024-10-06T19:30:17+02:00
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# lastmod: 2024-08-18T14:20:52+0000
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categories:
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- computerstuff
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tags:
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- networking
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- pfSense
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- openssh
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- selfhost
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---
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I spent some time adjusting my SSH configuration because I often get stalled
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connections to my servers but I never got that fixed until recently, when I
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started looking in my firewall settings on the pfSense.
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After changing the <kbd>Firewall Optimization Settings</kbd> within
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<kbd>System</kbd> → <kbd>Advanced</kbd> → <kbd>Firewall & NAT</kbd> to
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<kbd>Conservative</kbd> I had no more of these hangs of my SSH sessions.
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I use the `ControlMaster` setting in my SSH configuration so the stalled
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connections have to be killed with something like
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```console
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$ ssh -O exit {short hostname}
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```
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every time -- which is annoying.
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