Hi there, wonder if someone can help me out. Think my cable modem is blocking http request coming from the web. I have a linux box doing masquerading and I'm able to access my server internally using my public IP. However, if i try accessing the site outside the network, I get a site not responding error.


My cable modem is a Motorola SB5100, when i access the configuration page of the modem. I don't see any option to block http traffic. The modem came from my ISP (Adelphia). Do you think if i replace the modem that would solve the problem?

Also i constantly getting this request. Could this by my ISP testing if i have a http server running???

tcpdump output:
09:47:28.317653 67-23-147-86.chvlva.adelphia.net.4243 > 208.210.197.252.http: . ack 16326 win 65535 (DF)
09:47:28.320673 208.210.197.252.http > 67-23-147-86.chvlva.adelphia.net.4243: . 16326:17586(1260) ack 1 win 17640
09:47:28.324126 208.210.197.252.http > 67-23-147-86.chvlva.adelphia.net.4243: P 17586:18408(822) ack 1 win 17640
09:47:28.324550 67-23-147-86.chvlva.adelphia.net.4243 > 208.210.197.252.http: . ack 18408 win 65535 (DF)



Kev

Thx for all the help...

I am having the same problem. I'm running an SB4100 with Adelphia. I bought my modem at Best Buy 2 years ago so I don't think Adelphia has done anything to your modem. I am running Suse 9.2 and have everything set up the same as a friend of mine on his system that works (he has Time warner is the only difference). I can access my linux website internally (XP) thru my external name just fine. When I try to access my site from outside my network using a work pc or friend's pc it just times out. I can't do http or ftp externally. I'm in the same sinking boat. I have tried everything, read forums and books. I even had friends take a look, no luck. Know your pain.

A friend of mine, networking pro, has Adelphia in So. Calif. For many years they have blocked HTTP and similar ports to discourage web servers. I presume they port-block in their routers not the cable modem.

He has always used high port numbers for his web servers - and has found some free or nearly so redirectors on the internet -to redirect a domain and http port 80 address to his address and high port numbers (i.e., make it transparent to others). As I recall, they have high tier ($$$$) service which does not port-block.

I have Time Warner/RoadRunner which has not blocked ports - instead the supposedly monitor and challenge bandwith hogs.