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Accessing bridged cable modem

Posted: Wed Apr 05, 2017 8:05 pm
by cmihai
Hello,

I have setup Gargoyle in default Gateway mode. WAN is set to DHCP (Wired). Local network is on 192.168.1.x. Everything works fine, but I can't access the modem (in bridged mode, 192.168.0.1) via router.

I followed a few threads "Accessing Bridged Modem", "Accessing Bridged VDSL Modem" to no avail.

Do you have any suggestions?

Thanks.

Re: Accessing bridged cable modem

Posted: Wed Apr 05, 2017 9:20 pm
by Lantis
If your modem is "bridged", shouldn't you be using PPPoE?
Unless it use PPPoE, the script to automatically enable access to the modem doesn't run.

You can create a static route to the modem (which is what the script does anyway)

Re: Accessing bridged cable modem

Posted: Thu Apr 06, 2017 9:18 am
by cmihai
I have a cable modem, isn't PPPoE used for a DSL connection?

Re: Accessing bridged cable modem

Posted: Thu Apr 06, 2017 4:01 pm
by Rog66
Are you sure the ip address in bridged mode is 192.168.0.1? For example virgin cable routers use 192.168.0.1 in router mode as their default ip address but can be accessed at 192.168.100.1 in router or modem (bridged mode).

Re: Accessing bridged cable modem

Posted: Thu Apr 06, 2017 4:21 pm
by Lantis
Just setup a static route and everything will be glorious.

Re: Accessing bridged cable modem

Posted: Thu Apr 06, 2017 9:24 pm
by cmihai
Rog66 wrote:Are you sure the ip address in bridged mode is 192.168.0.1? For example virgin cable routers use 192.168.0.1 in router mode as their default ip address but can be accessed at 192.168.100.1 in router or modem (bridged mode).
This is an excellent question Rog66, how can I understand my bridged modem IP address (so that I can setup a static route to it)?

Thanks

Re: Accessing bridged cable modem

Posted: Fri Apr 07, 2017 3:53 pm
by Rog66
cmihai - what isp / modem do you use?

Lantis - a static route wont help - the modem should be outside the lan ip subnet so any request will be routed out through the routers wan connection anyway - the problem is knowing which ip address the modem will respond to (and not just send onwards to the internet)

Re: Accessing bridged cable modem

Posted: Fri Apr 07, 2017 4:43 pm
by Lantis
Yes you need both.
You need the router to understand that requests to that subnet go out on that interface. And you also need it to not NAT it.

viewtopic.php?f=5&t=364

Re: Accessing bridged cable modem

Posted: Fri Apr 07, 2017 5:00 pm
by meazz1
For me with comcast, I setup my router ip to 192.168.1.1 and a static IP of 192.168.100.1 / 255.255.255.0 and I can access my modem just fine.

Re: Accessing bridged cable modem

Posted: Fri Apr 07, 2017 6:39 pm
by Rog66
ok looks like that code is adding a vlan on the wan port not a static route but either way this isn't required on UK cable (Virginmedia) modems in bridge mode (from memory accessing some bridged DSL modems is a complete nightmare in contrast)