From 6815379c718e1262f621f04b64ac5ec60a8706d3 Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Sat, 24 Feb 2024 18:17:53 +0100
Subject: [PATCH] =?UTF-8?q?ssh=20keepalive=20=F0=9F=87=A9=F0=9F=87=B0?=
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---
 modules/desktop/ssh.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/desktop/ssh.nix b/modules/desktop/ssh.nix
index 3cb8155..a0c4239 100644
--- a/modules/desktop/ssh.nix
+++ b/modules/desktop/ssh.nix
@@ -9,6 +9,10 @@
       # will reuse the master session's connection rather than initiating a new
       # one. This is especially useful when using SCP.
       controlMaster = "yes";
+      # ISPs in Denmark prefer the simplicity of CG-NAT and stateful firewalls
+      # to the mess that is IPv6. Force keepalive packets to avoid sessions
+      # dying. See https://news.ycombinator.com/item?id=25737611.
+      serverAliveInterval = 25;
       matchBlocks = {
         "git.caspervk.net" = {
           port = 2222;