common: Use 60s ServerAliveInterval for OpenSSH.

Especially while being in an environment with unstable connectivity, it
helps a lot to prevent SSH sessions from being dropped.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/common.nix b/common.nix
index baa65336..111b5c6c 100644
--- a/common.nix
+++ b/common.nix
@@ -27,7 +27,11 @@
   networking.useNetworkd = true;
 
   i18n.consoleKeyMap = "dvorak";
+
   programs.ssh.startAgent = false;
+  programs.ssh.extraConfig = ''
+    ServerAliveInterval 60
+  '';
 
   services.nixosManual.showManual = false;