During college I or a roommate owned our own cable modems. I admittedly didn't know much about networking, dchp, etc, but we often had problems with internet drop outs.
For years since then I've leased a modem. The two or three I've been provided have worked perfectly. For a long time it was free, then $3, and finally this spring it hit $8 a month and I said no more - time to buy my own.
So I bought a Motorola SB6121. I use it in combo with a Belkin F5D8236-4 v2 (01) router that I've used since 2009.
I've had so many drop out problems. Various web pages will just temporarily fail to load. After a few minutes refreshing the page opens it without a problem. Here is exactly what I'm getting:
The error is always "The remote computer isn’t responding to connections on port 443, possibly due to firewall or security policy settings, or because it might be temporarily unavailable. Windows couldn’t find any problems with the firewall on your computer. " Or it will list port 80 like it just did a few minutes ago when AVSForum failed to load.
Things I've done to troubleshoot:
-completely reset Internet Explorer. Its not an IE based problem - it happens on Chrome too.
-changed the DNS servers inside Windows
-changed the DNS servers in my router
-completely reset my router
-tried bypassing the router and plugging my htpc direct to my modem - I get ZERO connection to the net. My Windows XP netbook connected fine.
Other relevant info:
-when a site is hanging I can ping it at the command line with no packet loss
-when its hanging directly typing an ip address doesn't work (telling me its not DNS related)
-When a page is failing to load in IE it fails in Chrome too. However, I seem to be able to open the pages on my wifi connected netbook. I haven't used the netbook enough to replicate the problem there.
My assumption is that either 1) I just got a crap modem, or 2) something else is set incorrectly somewhere deep in the Windows set up. Comcast tech support said I have a good signal and its a Microsoft issue. Then problem is that the very arbitrary nature of the dropouts makes it tough to troubleshoot.
I tried to add all relevant event logs and summaries but the forum software doesn't like XML and ETL files. The text ones submitted fine. I tried numerous ways to get a tracerpt dump file onto the forum but it keeps refusing it, not matter if I try uploading txt or I try copy and pasting it. If it could help someone ill gladly send it.
Any ideas would be greatly appreciated. I guess id like to start with why my pc cant get online when connected directly to the modem.