From 9c82e500075bc113f2f367e5a1d93e96e10aa04f Mon Sep 17 00:00:00 2001
From: openoms <43343391+openoms@users.noreply.github.com>
Date: Mon, 1 Sep 2025 11:12:41 +0200
Subject: [PATCH] tailscale add exit node on Debian 13

---
 tailscale/tailscale-exit-node-setup.md | 33 ++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 tailscale/tailscale-exit-node-setup.md

diff --git a/tailscale/tailscale-exit-node-setup.md b/tailscale/tailscale-exit-node-setup.md
new file mode 100644
index 0000000..3568796
--- /dev/null
+++ b/tailscale/tailscale-exit-node-setup.md
@@ -0,0 +1,33 @@
+# TESTED ON A DEBIAN 13 VPS
+```
+curl -fsSL https://tailscale.com/install.sh | sh
+
+sudo tailscale up --advertise-exit-node
+# Warning: IP forwarding is disabled, subnet routing/exit nodes will not work.
+# See https://tailscale.com/s/ip-forwarding
+# Warning: UDP GRO forwarding is suboptimally configured on eth0, UDP forwarding throughput capability will increase with a configuration change.
+# See https://tailscale.com/s/ethtool-config-udp-gro
+
+
+# See https://tailscale.com/s/ip-forwarding
+echo 'net.ipv4.ip_forward = 1' | sudo tee -a /etc/sysctl.d/99-tailscale.conf
+echo 'net.ipv6.conf.all.forwarding = 1' | sudo tee -a /etc/sysctl.d/99-tailscale.conf
+sudo sysctl -p /etc/sysctl.d/99-tailscale.conf
+# net.ipv4.ip_forward = 1
+# net.ipv6.conf.all.forwarding = 1
+# net.ipv4.ip_forward = 1
+# net.ipv6.conf.all.forwarding = 1
+
+
+# See https://tailscale.com/s/ethtool-config-udp-gro
+NETDEV=$(ip -o route get 8.8.8.8 | cut -f 5 -d " ")
+sudo ethtool -K $NETDEV rx-udp-gro-forwarding on rx-gro-list off
+
+sudo mkdir -p /etc/networkd-dispatcher/routable.d/
+
+printf '#!/bin/sh\n\nethtool -K %s rx-udp-gro-forwarding on rx-gro-list off \n' "$(ip -o route get 8.8.8.8 | cut -f 5 -d " ")" | sudo tee /etc/networkd-dispatcher/routable.d/50-tailscale
+sudo chmod 755 /etc/networkd-dispatcher/routable.d/50-tailscale
+
+sudo /etc/networkd-dispatcher/routable.d/50-tailscale
+test $? -eq 0 || echo 'An error occurred.'
+```