Windows Forum

Ask something
Discussion Locked

VPN Access using Cable

0 helpful
7 replies

by ruturaj

Closed to new repliesThis discussion is closed. It stays readable, but it takes no new replies.

I have a strange problem that I need solved ASAP.
We have a Cisco 3000 Concentrator serving as a VPN Server at the office (since the past 2 years running without a problem) end & Clients connect using the software provided by Cisco (Windows NT IPSEC Support Client) after establishing the initial connection clients log on to the network & use Various Applications (Intranet Based, VNC etc) lately in sporadic areas where people are using cable modems only are having problems connecting (connection too slow vnc won't come up, Web Page of intranet site won't come up, timeouts etc.) now if the same people use dial-up it's fine. We called the cable companies to see if the problem was there & they say to upgrade to their business services (which is too expensive).

Through all this what I need to know is that is there some kind of port filtering lately been enabled by the cable companies that restrict access to uncommon or non standard ports?

7 replies

by dominicon

Yes, in light of the nimda and other worms the cable companies have been filtering all kinds of ports.

You may want to press your cable company to see what they are filtering.

by ruturaj

Tried talking to them they want us to buy pro or business services any way thanks for the reply

by metrophage

You might check and see if they have a personal firewall installed. I was having problems accessing our VPN server and it was ZoneAlarm that kept me from accessing. Turn ZoneAlarm off (or switch to Tiny Personal Firewall) and it worked fine.

by ruturaj

IT helps now I can prove it to the CTO that it is being filteres thanks man, Oh & ComCast is on the list of a few of my cable users

This discussion is closed to new replies.