From b5e32dea92de7689a83c649a4aef0d41b1e2b86c Mon Sep 17 00:00:00 2001
From: Dikshant Adhikari <ad.dikshant@gmail.com>
Date: Thu, 18 Aug 2022 01:26:05 -0400
Subject: [PATCH] add: port forward to entrypoint

---
 entrypoint.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/entrypoint.sh b/entrypoint.sh
index b969172..d5213a1 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -50,6 +50,11 @@ if [[ -z "$LOCAL_SUBNETS" && "$LOCAL_SUBNET" ]]; then
     LOCAL_SUBNETS=$LOCAL_SUBNET
 fi
 
+# Hack to allow upstream port forwarding through a VPN provider
+if [[ -z "$PORT_FORWARD_DEST" && "$PORT_FORWARD_TO" ]]; then
+    iptables -t nat -I PREROUTING -p tcp --dport $PORT_FORWARD_DEST -j REDIRECT --to $PORT_FORWARD_TO
+fi
+
 for local_subnet in ${LOCAL_SUBNETS//,/$IFS}
 do
     echo "Allowing traffic to local subnet ${local_subnet}" >&2