Accessing my modem GUI

[tarassippo]

Hi All,

Searching the Internet for a solution, I read that in order to access my modem GUI (which is connected to an RT-AC66U_B1 with Merlin v384.12) I should have had simply typed from within a SSH session the following command:

ifconfig $(nvram get wan0_ifname):0 192.168.1.2 netmask 255.255.255.0

being the IP modem address 192.168.1.1

And it actually works, so happy days...

The article also mentioned a second command, that is

iptables -t nat -I POSTROUTING -o $(nvram get wan0_ifname) -j MASQUERADE

which I didn't type as I have no clue whatsoever what it does and with the first command I am able to access the modedm GUI.

So, can someone please explain to me what that second command does and whether it's necessary (perhaps for security reasons ?) that I should also include/type in that command ?

Tia.

 

[tarassippo]

Meanwhile wanted to go one step further and I thought it would be nice to have a script which could run the command every time the rooter must be rebooted...

I had a read of this: https://github.com/RMerl/asuswrt-merlin/wiki/User-scripts and I've created a file called wan-start and saved as Unix script file with Notepad ++

then copied that in the /jffs/scripts/ directory with WinSCP

and I've enabled JFFS

and I have set the script being executable as per Merlin guide...

I did reboot the router a few times but unfortunately the script seems not running as I have to input the command through SSH in order to access the modem GUI, what am I missing ?

Thanks.

 

[AndreiV]

What modem are you using?

 

[tarassippo]

A Draytek Vigor 2760 in bridge mode

 

[AndreiV]

Ah, bridge mode makes it harder.

I use a Vigor 130 and simply access the modem stats via 192.168.2.1/

There is a Knowledge base article for accessing stats for the 130 in bridge mode, don't know if it will help :

https://www.draytek.com/support/knowledge-base/5212

 

[tarassippo]

Thanks, but like I said in the first post, I can access the modem GUI...

My 2 questions were about a second command and the script which doesn't run when I reboot the router...

 

[tarassippo]

So, I fixed the script issue, that is I just had to add sleep 20s and now it works.

Any networking savvy willing to advise if I'd have any security issues not running the second command ?

iptables -t nat -I POSTROUTING -o $(nvram get wan0_ifname) -j MASQUERADE

Tia.