Hello,
I am a bit noob-ish when it comes to this but will try to explain best I can. Everything works great right now, only stops working when trying to upgrade to newer router. I have 3 IIS servers each with own dedicated IP from my ISP. Each has its own .com domain and they are all binded to HTTPS which is automated from certbot.
Currently I am using router RV042G, its a very simple setup. I have 4 dedicated IP's from my ISP. One is for the WAN, and other 3 for each IIS server. The LAN is a simple 10.0.1.0/24. The router firewall is off, no ports forwarded or no upnp ports being used.
What I am using in RV042G is One-To-One NAT for my 3 IIS servers. 10.0.1.10-13 => x.x.x.43-45. I have a Sonicwall hardware firewall after the router and before all the switches, the only rule it has is WAN-to-LAN ALLOW (https to ServersGroup), and then DENY ALL WAN-to-LAN.
Using just this, my websites load up just fine from outside.. but when I recreate the same simple network config in new router RV345, the websites refuse to load. On new cisco router RV345, firewall is off, no upnp, no ports forwarded, just the 1:1 NAT. Its the same exact config as on my RV042G.
Am i doing something wrong? Any idea or pointers in the right direction?
I've tried, enabling cisco firewall and allow all to the servers. Even port forwarding to just one site will not make it load from outside. upnpn does not pick up anything at all.
