From d59bfded58b63611b0f9d929c446bd03c5ae3630 Mon Sep 17 00:00:00 2001
From: Izorkin <izorkin@elven.pw>
Date: Wed, 21 Oct 2020 14:16:44 +0300
Subject: [PATCH] nixos/dhcpcd: if disabled IPv6 don't solicit or accept IPv6

---
 nixos/modules/services/networking/dhcpcd.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nixos/modules/services/networking/dhcpcd.nix b/nixos/modules/services/networking/dhcpcd.nix
index 0507b739d499..d10bffd91474 100644
--- a/nixos/modules/services/networking/dhcpcd.nix
+++ b/nixos/modules/services/networking/dhcpcd.nix
@@ -69,6 +69,11 @@ let
         if-carrier-up = "";
       }.${cfg.wait}}
 
+      ${optionalString (config.networking.enableIPv6 == false) ''
+        # Don't solicit or accept IPv6 Router Advertisements and DHCPv6 if disabled IPv6
+        noipv6
+      ''}
+
       ${cfg.extraConfig}
     '';