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Hello! I have been trying to port forward ports for a security system sadly no luck. I use a DDWRT router (X10, Netgear) I know I have to write custom script into the firewall but it doesn't seem to work, obviously I am doing something wrong. iptables -I FORWARD -i tun0 -p udp -d 192.168.1.50 --dport 10001 -j ACCEPT iptables -I FORWARD -i tun0 -p tcp -d 192.168.1.50 --dport 10001 -j ACCEPT iptables -t nat -I PREROUTING -i tun0 -p tcp --dport 10001 -j DNAT --to-destination 192.168.1.50 iptables -t nat -I PREROUTING -i tun0 -p udp --dport 10001 -j DNAT --to-destination 192.168.1.50 What am I doing wrong? My router is using tun0 for VPN The IP adress of the security system is set to 192.168.1.50 The port needed to be forwarded is 10001 I have also forwarded the port in the Client Area. I have checked the port on canyouseeme.org and airvpn itself. Both seem unable to reach. iptables -I FORWARD -i br0 -o tun0 -j ACCEPT iptables -I FORWARD -i tun0 -o br0 -j ACCEPT iptables -I INPUT -i tun0 -j REJECT iptables -t nat -A POSTROUTING -o tun0 -j MASQUERADE iptables -I INPUT -p udp --dport 68 -j ACCEPT This also is in my firewall setting but that shouldn't conflict with each other (I think) Kind regards,Blitz