Ports on Xp

  • Thread starter Thread starter Mike
  • Start date Start date
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Mike

I wanted to close some ports on XP, such as 23 & 139,
but i seem to be somewhat baffeled...

Thanks....
 
Mike said:
I wanted to close some ports on XP, such as 23 & 139,
but i seem to be somewhat baffeled...
Click to expand...

You don't "close" the ports, you find out what is opening them and stop that
from running. A subtle but important distinction.

Let's start with: how did you determine that something was listening on
those ports in the first place.
 
Port 23 Telnet
Telnet, running at TCP port 23, is one of the oldest protocols on the
Internet, allowing remote logins to UNIX machines.

The Telnet service uses port 23.

Port 139 NetBIOS
NetBIOS Session (TCP), Windows File and Printer Sharing
This is the single most dangerous port on the Internet. All "File and
Printer Sharing" on a Windows machine runs over this port. About 10% of all
users on the Internet leave their hard disks exposed on this port. This is
the first port hackers want to connect to, and the port that firewalls
block.

In File and Printer Sharing, Allow file and printer sharing check box that
opens UPD ports 137 and 138, and TCP port 139 and 445

Lots of worms like port 139.

All of these services use NetBIOS Session Service and port 139.
Computer Browser, Fax Service, Performance Logs and Alerts, Print Spooler,
Server, Net Logon, Remote Procedure Call Locator, Distributed File System,
Systems Management Server 2.0 and License Logging Service.
http://support.microsoft.com/kb/832017

--
Hope this helps. Let us know.

Wes
MS-MVP Windows Shell/User

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