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Webslingerac

join:2004-05-01
canada

Does Rogers filter ports 135 and 445?

What happens when you folks run GRC ShieldsUp port scanner? www.grc.com

Do you see ports 135 and 445 as closed (and not stealth)? If so, is Rogers filtering these ports (and, therefore, the tests for those ports aren't even reaching your computer or router), which would be the reason for the "closed" result?

Port 135
Name:
dcom-scm
Purpose:
DCOM Service Control Manager
Description:
Microsoft's DCOM (Distributed, i.e. networked, COM) Service Control Manager (also known as the RPC Endpoint Mapper) uses this port in a manner similar to SUN's UNIX use of port 111. The SCM server running on the user's computer opens port 135 and listens for incoming requests from clients wishing to locate the ports where DCOM services can be found on that machine.

Port 445
Name:
microsoft-ds
Purpose:
Microsoft Directory Services
Description:
This port replaces the notorious Windows NetBIOS trio (ports 137-139), for all versions of Windows after NT, as the preferred port for carrying Windows file sharing and numerous other services.


Webslingerac

join:2004-05-01
canada

Several years ago, Rogers did block those ports:
»Re: SMTP relay problem

Do they still?



sbrook
Premium,Mod
join:2001-12-14
Ottawa
kudos:13
reply to Webslingerac

They block ports so that computers on the same cable segment for different customers cannot see each other. This is a "GOOD THING (tm)" not bad