From ee49f703871060bff78b4d87e9c52c6bf74dc98d Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Mon, 3 Jun 2024 23:35:23 +0200
Subject: [PATCH] alpha: enable proxy arp

---
 hosts/alpha/network.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hosts/alpha/network.nix b/hosts/alpha/network.nix
index b941816..6173355 100644
--- a/hosts/alpha/network.nix
+++ b/hosts/alpha/network.nix
@@ -22,6 +22,10 @@
         }
         {routeConfig = {Gateway = "fe80::1";};}
       ];
+      # Enable proxy ARP to answer ARP requests for the floating IP addresses,
+      # intended for the wireguard peers, from Hetzner's router. Without this,
+      # the router will not send traffic to us.
+      networkConfig.IPv4ProxyARP = true;
     };
 
     # The following routes traffic destined for 49.13.33.75 (floating IP) to