TWC replaced my old cable modem with a new one. The new one has a built-in router, wifi, and all that. I just plugged the WAN port from my old router into one of the LAN ports on the new one, made a DHCP reservation for it, and on the virtual servers tab I created a port forward (inbound port 1-65535, TCP+UDP, Local IP 192.168.1.3).

Right now my desktop is plugged into the TWC router as 192.168.1.2 and the DLink router is 192.168.1.3 (with a DHCP reservation). I can connect to devices on the other side of the DLink router using 192.168.1.3:port (i.e. i can SSH into my linux server using 192.168.1.3:22). But I can't access anything using the external IP address.

Shouldn't this work? I also tried putting 192.168.1.3 in the DMZ and no change.

11/7/2013 7:33:22 PM

Nevermind. The Arris DG860A is a piece of shit. Searching online shows everyone has problems getting it to forward ports. It eventually works if you repeatedly enable and disable the DMZ host and reboot the router.

11/7/2013 7:46:37 PM

set your new modem to bridge mode, use your router for routing

11/7/2013 8:39:04 PM

^

11/7/2013 8:52:20 PM

I would if it supported such a thing.

Also, port forwarding apparently doesn't work if DHCP is enabled on it or the firewall is disabled.

11/7/2013 8:57:37 PM

What do you mean, what happens when you switch it to bridge mode?

I don't know what Time Warner has in terms of equipment but I haven't had a single hiccup with the actual non-superextremefancy-wifi!gateway version of that from my ISP.

Quote :

"ARRIS DOCSIS 3.0 Touchstone WideBand Cable Modem HW_REV: 1 VENDOR: Arris Interactive, L.L.C. BOOTR: 1.2.1.61 SW_REV: 7.3.139C MODEL: CM820A"

[Edited on November 7, 2013 at 11:40 PM. Reason : .]

11/7/2013 11:35:25 PM

It doesn't have a bridge mode or I would use it.

11/8/2013 7:25:19 PM

Fuck that, exchange it imo.

11/8/2013 9:19:23 PM

Plug the router's WAN into a LAN port on the TWC modem/router, set the D-Link router to use DHCP, on the TWC modem/router assign the D-Link a static IP by MAC reservation and put the router in the DMZ by IP or skip the static IP by MAC reservation and put the D-Link in the DMZ by MAC address/hostname if the TWC router/modem supports it, disable wireless on the TWC modem/router, plug the desktop into the D-Link router and run all wired/wireless connections through the D-Link. I'm running my own Netgear R7000 router on a Uverse modem/router with this exact configuration and it works fine.

11/11/2013 6:42:26 PM

Or set the dlink to bridge mode and just use it as a switch.

11/11/2013 9:21:41 PM

The routing capabilities, QoS, etc of the modem/router combos provided by ISPs usually suck compared to even a middle of the road stand alone router, which is why I'd steer clear of the bridge setup

11/11/2013 10:00:02 PM

^^^

Quote :

"It eventually works if you repeatedly enable and disable the DMZ host and reboot the router."

It sounds like that's what he was trying to do, but the firmware is so buggy it made it improbable at worst and unreliable at best.

Just save the lease fee and buy a surfboard or a docsis3 Arris modem from ebay.

[Edited on November 13, 2013 at 10:03 PM. Reason : ]

11/13/2013 10:03:17 PM