diff --git a/config/net/upstream.nix b/config/net/upstream.nix
index ae4ba94..5ebf03f 100644
--- a/config/net/upstream.nix
+++ b/config/net/upstream.nix
@@ -89,7 +89,7 @@ in
           destination = config.site.net.core.hosts4.yggdrasil;
           proto = "tcp";
           reflect = true;
-          sourcePort = 1;
+          sourcePort = 1337;
         }
       ];
       interfaces = {
@@ -379,7 +379,7 @@ in
           destination = config.site.net.core.hosts4.yggdrasil;
           proto = "tcp";
           reflect = true;
-          sourcePort = 1;
+          sourcePort = 1337;
         }
       ];
       interfaces = {
diff --git a/nix/nixos-module/container/yggdrasil.nix b/nix/nixos-module/container/yggdrasil.nix
index 75b334f..83a5543 100644
--- a/nix/nixos-module/container/yggdrasil.nix
+++ b/nix/nixos-module/container/yggdrasil.nix
@@ -45,9 +45,9 @@ in lib.mkIf cfg.enable {
           "tls://[2001:41d0:601:1100::cf2]:11129"
         ];
       Listen = [
-        "tcp://[::]:1"
+        "tcp://[::]:1337"
         # Not needed as `sysctl net.ipv6.bindv6only=0` by default
-        # "tcp://0.0.0.0:1"
+        # "tcp://0.0.0.0:1337"
       ];
       NodeInfo = {
         # This information is visible to the network.