ISPs are blocking port 445?

[Tim Dijkstra <newsuser@famdijkstra.org>]

Hi,

This is slightly offtopic, but I didn't got a relevant answer in other places, so I thought lets ask my debian friends ;) 

I had my apache listening on port 445 for https connections, this worked
perfectly for a long time. Today I got a message from a user stating
that he couldn't get a connection. I have since then reproduced the
problem from a few domains. Then I checked everything: firewall, apache
logs, etc, but couldn't find a problem with my conf. Could it be that
there are some ISP's that are blocking 445? I found some reference to
DoS attacks on windows machines targeted at port 445..

thnx Tim