I recently had a new ISP install a Broadband solution at my office. (8 Mbit up and down).
My previous setup was:
DSL -> Bridged Modem -> ERL -> LAN
The setup now is:
New Broadband Modem(DHCP enabled) -> ERL (Receives IP and Gateway through DHCP from broadband router) -> LAN
I need to get my port forwarding setup again. I have no direct access to the new router (It's a leased service), but I do have a web management interface that has some basic configuration of settings that then get propagated to the router, of which one is port forwarding.
I have setup this port forwarding on the new router (Its firewalled, and I cant turn it off), and then also set it up on my ERL (as I had done before).
Now I expect the new router to pass this incoming connection to my ERL, and the ERL to then recognise the port, and pass it yet again on to my correct device.
I cant get it to work. :-(
The new broadband router is setup on range 10.0.0.0/24
It is connected to ETH1 on my ERL. (Internet port).
My ERL serves my LAN on ETH0, but on a range of 192.168.1.0/24
What I am uncertain about, is if the whole process will "flow", coming from the 10.0.0.0/24 subnet, being asked to pass to a 192.168.1.0/24 ip (when it is only connected to my ERL on its 10.0.0.0/24 IP that it received through DHCP from the new router.
I hope I am making sense :-)
To re-iterate, here is my current config:
Broadband router (10.0.0.254)(DHCP service enable)
Port forward rule to forward port 8090 -> 192.168.1.150
-------------->
ERL (eth1)(DHCP IP from Broadband Router)(10.0.0.x)
Port Forward and NAT rules for 8090 -> 192.168.1.150
-------------->
ERL (eth0)(LAN)(192.168.1.1)
I have also tried to have the first port forward rule (on the new router), forward to my ERL on its 10.0.0.x ip, but that also doe snto seem to work.
Broadband router (10.0.0.254)(DHCP service enable)
Port forward rule to forward port 8090 -> ERL eth1 IP (10.0.0.111)
-------------->
ERL (eth1)(DHCP IP from Broadband Router)(10.0.0.111)
Port Forward and NAT rules for 8090 -> 192.168.1.150
-------------->
ERL (eth0)(LAN)(192.168.1.1)
Thanks in advance for any help. Cheers.