From dbe16bdd8827d83ebfeb02968a18adc6ea1585b4 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Wed, 30 Sep 2015 16:30:48 +0200
Subject: shortened tcp keepalives

---
 ymir.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ymir.nix b/ymir.nix
index 53dfd7c5..a4bef801 100644
--- a/ymir.nix
+++ b/ymir.nix
@@ -17,6 +17,12 @@ in {
     device = "/dev/vda";
   };
 
+  boot.kernel.sysctl = {
+    "net.ipv4.tcp_keepalive_time" = 60;
+    "net.ipv4.tcp_keepalive_intvl" = 10;
+    "net.ipv4.tcp_keepalive_probes" = 6;
+  };
+
   nixpkgs.config.packageOverrides = pkgs:
     rec {
       prosody = pkgs.callPackage ./customized/prosody.nix ({
-- 
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