router - Intermittently disconnected from the Internet. Bridged cable modem
2014-04
user280511
After I recently had my cable modem company (Shaw) bridge their cable modem with my router, because their Cisco DPC3825 works so poorly on its own, I occasionally cannot connect to the Internet. I have to power cycle my cable modem and follow that up by power cycling my router before the connection is restored. My router is a D-Link DIR-835.
When I have internet it works great. The intermittent connection losses sometimes happen in 24 hours, sometimes in one week and sometimes in one month. As previously said I only get my Internet connection back after I power cycle the cable modem and then power cycle my router. The intermittent disconnections generally happen after I change settings for the router and save them, causing a router reboot. The settings changed could be as simple as a time or date change and do not seem directly related to the intermittent losses of internet. On occasion after a router reboot I have not suffered an intermittent loss of my internet connection so I'm not even sure if that is related. I am using port forwarding. When my internet connection is working everything is functioning well, the port forwarding works wonderfully.
It is almost like something is causing the internet signal being received from the cable modem to not be accepted at the router? Of course if this was the case shouldn't power cycling my router solve the problem? It doesn't. I need to power cycle the cable modem and then the router. My router is using both wireless and wired connections. I can access my cable modem's IP address but nothing beyond that. I am using Utorrent, since someone mentioned in a past post, this caused problems for them.
Does anyone know why? What am I not seeing? Thank you.
GetFree
I have a cable-modem connection to the internet and I bought a router in order to share my internet connection betwen my laptop and my PC.
The router I bought is D-Link DIR-300.
The first weird thing I notice after connecting all the wires and cables was that my laptop had direct connection to the internet (public IP) even though it was connected to the router (not the cable modem).
After that I connected my PC to the router, and to my surprise my PC got a public IP as well (a new IP, different from that of my laptop).
If I ping from my laptop to my PC (and vice versa) I get a successful response, meaning my PC and laptop can reach each other, but not through a private LAN (which doesn't exist in my case because both computers were given public IPs) but through the internet.
The ping between the two computers takes about 20 ms which is clearly a ping through the internet given that a ping through a private LAN takes 1 ms or less.
I also tried a D-Link DI-604 for testing, but that didn't happen. With the DI-604 my two computers were given private IPs as normal, so clearly the DIR-300 router is making the difference here.
So my question is... How is it possible to have two different public IPs behind a cable-modem and a router?
Is it some weird feature in DIR-300 that allows that?
John T
Depending on your ISP, some will supply you with multiple IP addresses. Mine only allows 1 lease at a time though. Your router is likely configured to allow the use of multiple IPs if available, although you can change it to only use 1 if you'd like.
regan
It's possible that NAT was disabled on the DIR-300. Is your internet service configured to provide you with more than one public IP address?