From 9c74f9a51ba8dbd27de4d36453950997ff551dec Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Mon, 29 Oct 2012 17:10:17 +0100
Subject: [PATCH] modules/programs/ssh.nix: configure AddressFamily properly

Explicitly restrict ssh clients to use of IPv4 addresses if IPv6 support is not enabled.
---
 modules/programs/ssh.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/programs/ssh.nix b/modules/programs/ssh.nix
index 5c4b8c3a9a1..123ef3c0256 100644
--- a/modules/programs/ssh.nix
+++ b/modules/programs/ssh.nix
@@ -42,6 +42,7 @@ in
       [ { # SSH configuration.  Slight duplication of the sshd_config
           # generation in the sshd service.
           source = pkgs.writeText "ssh_config" ''
+            AddressFamily ${if config.networking.enableIPv6 then "any" else "inet"}
             ${optionalString cfg.setXAuthLocation ''
               XAuthLocation ${pkgs.xorg.xauth}/bin/xauth
             ''}