OpenVPN TAP configration blocks port forwaring from internal

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mac2024
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Joined: 15 Jul 2019
Posts: 1

PostPosted: Mon Jul 15, 2019 14:46    Post subject: OpenVPN TAP configration blocks port forwaring from internal Reply with quote
Hello everyone,
I'm trying to configure an openvpn TAP (bridge) VPN between 2 routers.

TPLink wdr4300 - built 40189

I'm using the following code to connect them:

# Move to writable directory and create scripts
cd /tmp

# Config for Static Key Trust
echo "
-----BEGIN OpenVPN Static key V1-----
xxxx
-----END OpenVPN Static key V1-----
" > Mac2Trust.key

# Config - Mac to MacR TAP Server
echo "
proto udp4
port 1194
dev tap0
secret /tmp/Mac2Trust.key
cipher AES-256-CBC
verb 3
comp-lzo
keepalive 15 60
daemon

" > Mac2MacTAP.conf
chmod Mac2MacTAP.conf 600

# Create interfaces
openvpn --mktun --dev tap0
brctl addif br0 tap0
ifconfig tap0 0.0.0.0 promisc up
route add -net 192.168.1.0/24 dev br0
openvpn --config Mac2MacTAP.conf

## TAP Firewall Server ##
iptables -I INPUT -p udp4 --dport 1194 -j ACCEPT
## TAP Firewall Server End ##

Also I have some port forwarding to access a couple of things from WAN, like a RDP connection.

If I call the RDP from internal network with the WAN address I can access perfectly.

My issue is when I apply this OpenVPN configuration. Access from WAN (External) to forwarded ports works fine, but if I try to access them from internal network with WANAddress: port, they not work.

I'm not sure if there is some routing/firewall issue here. Any assistance will be appreciate.

Thanks in advance.
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