Add host script for ipv4 forward

packages/hostScriptsServices/hostScripts/ensure_ipv4_forward.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# ensure_ipv4_forward.sh
+# This script ensures that IPv4 forwarding is enabled on the system.
+
+set -e
+set -o pipefail
+
+
+# Check if IPv4 forwarding is already enabled.
+if sysctl net.ipv4.ip_forward | grep -q 'net.ipv4.ip_forward = 1'; then
+    echo "IPv4 forwarding is already enabled."
+    exit 0
+fi
+
+# If the configuration is already present in /etc/sysctl.conf or /etc/sysctl.d/, do not change it.
+if grep -Eq '^[^#]*net\.ipv4\.ip_forward\s*=' /etc/sysctl.conf /etc/sysctl.d/* 2>/dev/null; then
+    echo "Found existing IPv4 forwarding configuration. Exiting."
+    exit 0
+fi
+
+# Enable IPv4 forwarding.
+dest_file="/etc/sysctl.conf"
+[ -d /etc/sysctl.d ] && dest_file="/etc/sysctl.d/99-tailscale.conf"
+
+echo 'net.ipv4.ip_forward = 1' | tee -a $dest_file
+sysctl -p $dest_file

packages/hostScriptsServices/src/hostScripts/runScripts.ts

@@ -17,7 +17,8 @@ type ScriptName =
   | "avahi_daemon.sh"
   | "reboot_required.sh"
   | "docker_upgrade.sh"
-  | "update_upgrade.sh";
+  | "update_upgrade.sh"
+  | "ensure_ipv4_forward.sh";
 
 /**
  * Run a script for the hostScripts folder