![]() Iptables -I FORWARD -d 192.168.0.20 -p tcp -dport 21 -j ACCEPT Iptables -I FORWARD -d 192.168.0.15 -p tcp -dport 80 -j ACCEPT Iptables -I FORWARD -d 192.168.0.15 -p tcp -dport 21 -j ACCEPT Ifconfig $WANIF:3 173.X.X.252 netmask broadcast Ifconfig $WANIF:2 173.X.X.251 netmask broadcast Ifconfig $WANIF:1 173.X.X.250 netmask broadcast Copy/Paste Examples Startup Script # Save Startup In other words, forwarding all connections would be no firewalling for that IP address. Which instead of forwarding just a single port, will let through all tcp/udp connections on all ports to this public ip->lan ip. 7: The NAT-PMP protocol is supported by a broad range of routers including: 8 Apple AirPort Express 9 Apple AirPort Extreme 10 Apple Time Capsule 11 DD-WRT 12 OpenWrt v8.09 or higher, with MiniUPnP daemon 13 pfSense v2.0 14 Tarifa (firmware) (Linksys WRT54G/GL. You could also replace above rule(s) with the following: Gets the routers WAN IP using the NAT Port Mapping Protocol (NAT-PMP). Iptables -I FORWARD -d -p tcp -dport -j ACCEPT Iptables -t nat -I POSTROUTING -s -j SNAT -to-source Take that toy back and get you a real router : Back to top: FrancoisC DD-WRT Novice Joined: Posts: 36 Location: Montreal, Qc. Masquerade returned packets from the local ip to the public IP DD-WRT is a little too complex for simple Crapple users. Iptables -t nat -I PREROUTING -d -p tcp -dport -j DNAT -to-destination : Route packets on a port on the new public IP, to a different port of a local IP. Iptables -t nat -I PREROUTING -d -j DNAT -to-destination Route all packets for the new public IP, to a certain local IP. Put them in the command box and use the Save Firewall button on the Administration -> Commands page to save them to your firewall script. ![]() Here are some examples of firewall rules to NAT the external IP's to your internal IP's. If you do not know how to calculate your broadcast address, then enter your IP and subnet mask into this. This must be done for each public static IP and should be saved to the Startup script using the Save Startup button on the Administration -> Commands page. Set up new public static IP on dd-wrt WAN interface. Tnx in advance.One-to-one NAT (aka Static NAT) is a way to make systems behind a firewall and configured with private IP addresses appear to have public IP addresses.īegin by assigning one of the static addresses to the WAN port using the Web interface and then use these scripts to add the rest.Įverything in square brackets needs to be replaced by your values. If anybody had a similar problem please share experiences. I doubt they are the root of my troubles. Iptables -I INPUT -i br1 -p tcp -dport 53 -j ACCEPT Iptables -I INPUT -i br1 -p udp -dport 53 -j ACCEPT Iptables -I INPUT -i br1 -p udp -dport 67 -j ACCEPT Iptables -I INPUT -i br1 -m state -state NEW -j DROP Iptables -t nat -I POSTROUTING -o br0 -j SNAT -to `nvram get lan_ipaddr` Iptables -I FORWARD -i br1 -d `nvram get lan_ipaddr`/`nvram get lan_netmask` -m state -state NEW -j DROP Iptables -I FORWARD -i br0 -o br1 -m state -state NEW -j DROP Iptables -I FORWARD -p tcp -tcp-flags SYN,RST SYN -j TCPMSS -clamp-mss-to-pmtu Iptables -I FORWARD -i br1 -m state -state NEW -j ACCEPT Iptables -t nat -I POSTROUTING -o `get_wanface` -j SNAT -to `nvram get wan_ipaddr` I also have in my conf several firewall rules cause I use my routers wifi connection and have 2 separate wlans. > Hold the reset button until lights flash (10-30sec) or 30-30-30 if appropriate for your router. There is a black button on my DD-WRT SL-R7202, as shown: In fact, how to reset DD-WRT needs to be paid attention to. I'm using a dlink router with DD-WRT v24-sp2 (06/08/12) std. Reset to Factory Defaults on DD-WRT Router (The 2nd Router) First of all, we need to reset DD-WRT. ![]() I'm trying to work out where/why/how external requests been masqueraded as routers internal ip address?!?! I have a problem where all external requests are logged or interpreted like they are originating from the router as the log shows shows the routers ip rather then the originating clients IP.
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