So, starting around Sunday (while I was gone of course), our router seemingly stopped to allow internet access. So I started to troubleshoot. I still had full router access, so that was what told me no internet connection. It detects the cable between just fine, with its flashing light and all. Plugging directly into the cable modem gets me an internet connection just fine. Tried switching cables between the cable modem and router, no change. Tried a brand new router, no change, same 'No Internet Connection' BS. Tried upgrading firmwares (obtained since the interwebz still works through the modem). So basically, Im figuring that something has changed with my ISP to where they dont want a router on it? Any other ideas to check out before I call them in the morning? Summary: Modem to Computer = Interwebz Modem to Router to Computer = LAN access, no Interwebz Tried: Different cables, turning off and on, different router, different firmware
it sounds like they are filtering out all MAC addresses except the one for your desktop. The simple solution is to use the clone mac address tool available on most decent routers. If the doesn't work it could be something more severe like a double NAT or a problem with the modem itself.
i had the same exact problem the other day with my old linksys router. It was very strange and we could never figure out what the problem was, we just ended up going and buying a new one, No idea what was wrong with it.
As phate said, a MAC address filter installed by your ISP is the most likely reason. Do you remember whether you registered your computer's MAC address before using the connection? Or did you use your computer to connect to the internet the first time after signing up, before plugging in your router? It might also be the case that your ISP has silently changed some protocol parameters. If your router supports automatic detection of the connection type (encapsulation like PPPoE/PPPoA, ATM parameters and so on), you might want to give that a try. Reset the router to its factory defaults, then perform something like a "first-time" installation. Similar story here. One of my old ADSL modems quit working around 2 years ago; after opening the case, I saw some burn marks near the unit's voltage regulator. Another day, an ethernet switch ceased to work. The LEDs indicated an active connection, but the PCs reported the link as being down. After a restart of the switch, nothing happened; it didn't even probe the connections as it normally did. Fortunately, it was easy to fix: we replaced all electrolytic capacitors (4) on the board, as some of their cans seemed to have opened and the electrolyte vaporized. Unit works fine since then...
Reset the router to its factory settings and ask the isp to add your routers mac address. That would do it.
Its not a Mac address issue, as my computer had never been hooked up to the line directly. And any other machine works fine as well. Doesnt need a Mac address registered, and my router has worked fine for months. I know all about Mac addresses and all that Ive tried resetting stuff, tried new routers, and all. Eventually, it started to work (and I didnt change a thing), but its still not as stable as it should be. Its either the modem, or the ISP itself, but I dont have time to worry about it lol. I should note, Im fairly competent at this point with networking, having done the whole CCNA course thing, so its not my fault hah.
Done it, tried lots of firmware It worked fine for months, but then just over the weekend it stopped, so its probably the ISP
this is just a confirmation but try using somebody elses's router of the same type, Like I had an oldschool Linksys blue router, and I tried using somebody elses that was the same oldschool type and his worked so I just decided to get another.
Ive tried a brand new router, which is basically the same model as I had, just a new look. It was just the internet connection not functioning. Its working alright for now, just not as perfect hah
