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Nat loopback merlin2/20/2023 Since my OpenVPN server is running on the main router, it has the same IP as the gateway and there is no need to route the server-side LAN gateway to the VPN client subnet. Push "route 255.255.255.255" - no change, remote client can access local servers via LAN IP but not WAN IP. I also attempted to 'advertise' my WAN IP: Push "route 192.168.0.0 255.255.255.0" - no change, remote client can access local servers via LAN IP but not WAN IP. I followed the advice in the article posted about 'advertising' my home subnet in the server-side configuration with the following: If the client attempts to use the WAN IP via NAT Loopback to access local servers then they cannot connect. Like I mentioned before, the remote clients have no trouble accessing everything on my home network as long as the LAN IP is used. Thanks for the reply however this situation is a little different. This may be more notable on older routers or 800 series.HOWTO: Expanding the scope of the VPN to include additional machines Enabling NVI makes your router take a slight performance hit. Look inside the file for how configure IOS to use the script. statements visible in the output of show ip nat translations instead of ip nat nvi translations.) (BTW, you can tell this is happening to you if you have ip nat source static. I'm just going to leave this here, and if anybody needs help feel free to ask. This breaks "port forwarding" in general, so I wrote a script to re-enter the statements as soon as the interface is placed in up status. This is GREAT, right ?! Not so if you have a dynamic IP address, because as soon the router reboots, it will start up, and the NAT entries will be classical NAT entries instead of NVI entries. Now, you should be able to access your web server from the LAN using the GLOBAL IP ADDRESS. System Log-Port Forwarding are as follows: Destination Proto Port range Redirect to Local Port. Ip nat source route-map NAT_MAP interface Dialer1 overload for ip nat inside source route-map NAT_MAP interface Dialer1 overload in global configuration mode. My NAT Loopback (in the firewall section) is set to Merlin. Ip nat inside source static a.b.c.d xx int fa0 yy for i p nat source static a.b.c.d xx int fa0 yy in global configuration mode. Ip nat outside or ip nat insidefor ip nat enable in interface configuration mode. You have to configure another type of NAT called NVI instead of traditional NAT. If you cannot reach an internal server using the GLOBAL IP address and port, then this post is FOR YOU! It is difficult to get to these kind of questions using Google, so I will rephrase: They practically turn a router into a NAT server to a switched network. FIXED: Accidentaly lock out of webui due to software hammering the routers webui without valid login credentials FIXED: NAT Loopback broken with CTF. REMOVED: SNMP support on the RT-AC86U (incompatible) - REMOVED: Merlin NAT loopback mode (was increasingly problematic as the firmware firewall handling became more complex) 384.3 (1) - NOTE: To reduce confusion following the version bump to 384, the current Github repository was renamed from asuswrt-merlin.382 to asuswrt-merlin.ng. These configuration in their simple form have only one interface. This sounds like what you want, but is very likely NOT what you want. Hairpinning is a technique used in a NAT-on-a-stick configuration that involves having the NAT "loopback" the traffic. People call it all sorts of crazy things like: NAT Hairpinning, NAT-on-a-stick, NAT reflecting, and NAT loopback. Managed to get it working on the Talk Talk network with TV in the UK. What you are looking to do is perform REVERSE PORT ADDRESS TRANSLATION. Both port forwarding and NAT Loopback working.
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