Asus RT-AC68U setting up Routing using CLI Help

[Ydnaroo]

Hi. I have an Asus RT-AC68U Firmware Version:3.0.0.4.380_7378 in a pretty vanilla router setup. I want to be able to access a modem on the WAN connection that is set to be accessed on 192.168.2.1. Having dug about in various places on the web I have come up with the following CLI command:

ifconfig eth0:1 192.168.2.1 netmask 255.255.255.0

which adds:

eth0:1     Link encap:Ethernet  HWaddr 1C:87:2C:68:D2:C0
           inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           Interrupt:179 Base address:0x4000

to the router interface.

Having done that I can ping the modem on 192.168.2.1 from the router or any PC on the local network (192.168.1.*). However when I try to access the webpage or telnet on port 1023 I cannot make a connection. I can access the modem using these types of connection with a PC connected direct to the modem.

Can anyone give me any idea of whet else I need to add it allow these types of connection (TCP?) to the modem?

Any help appreciated.

Cheers - Andy

 

[Ydnaroo]

Hi. Re above. I've now sorted this using the excellent info here: https://www.snbforums.com/threads/access-modem-configuration-page.11957/page-2#post-111756

I've entered using telnet:

ifconfig `nvram get wan0_ifname`:0 192.168.2.2 netmask 255.255.255.0

Note : the IP number shown in bold must be one more than your modem's IP. If your modem's ip is 192.168.2.1 then it must be written as 192.168.2.2.

&

iptables -t nat -I POSTROUTING -o `nvram get wan0_ifname` -j MASQUERADE

and I can now access the modem from any PC on my home network. All credit to the above link.

Cheers - Andy