From 6bb5009ce813c129e6c988e782b9f2c9bc1483fd Mon Sep 17 00:00:00 2001
From: TheRealGramdalf <gramdalftech@gmail.com>
Date: Mon, 20 Jul 2026 18:54:12 -0700
Subject: [PATCH] nixos/caddy: increase UDP buffer size to match linked
 recommendation

---
 nixos/modules/services/web-servers/caddy/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/web-servers/caddy/default.nix b/nixos/modules/services/web-servers/caddy/default.nix
index 2ff45efd4e43..d707a6c4635c 100644
--- a/nixos/modules/services/web-servers/caddy/default.nix
+++ b/nixos/modules/services/web-servers/caddy/default.nix
@@ -448,8 +448,8 @@ in
     '';
 
     # https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
-    boot.kernel.sysctl."net.core.rmem_max" = mkDefault 2500000;
-    boot.kernel.sysctl."net.core.wmem_max" = mkDefault 2500000;
+    boot.kernel.sysctl."net.core.rmem_max" = mkDefault 7500000;
+    boot.kernel.sysctl."net.core.wmem_max" = mkDefault 7500000;
 
     systemd.packages = [ cfg.package ];
     systemd.services.caddy = {