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Ports open on Windows 19 years 2 months ago #477

I noticed that while trying to assess my system's ports, even on a newly intalled machine, port 137, 138, and 139( [img]images/smiles/icon_sad.gif[/img] ) are always open. What are these ports used for and are they a potential threat. My theory is that it is a possible back door for Gates and his staff. [img]images/smiles/icon_wink.gif[/img]

Ports open on Windows 19 years 2 months ago #478

  • Chris
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Oh Master [img]images/smiles/icon_smile.gif[/img]

Those ports you mentioned are used by the TCP/IP protocol for Netbios communications.

Putting it in simple terms, using these ports, windows machines can talk to each other and transfer data.

If your on a network at home and your talking to other machines, you need these ports open. If this is a stand alone pc, you can use a 3rd party firewall program e.g Zonealarm to close them up [img]images/smiles/icon_smile.gif[/img]


Chris Partsenidis.
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Ports open on Windows 19 years 3 weeks ago #479

The way to disable the ports is to not enable Client for Microsoft Networks and File and Print sharing. I know on the new XP it comes pre-enabled but if you were to disable it you will notice the ports close.

Ports open on Windows 19 years 3 weeks ago #480

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format c: /q /u

quick fix.

Ports open on Windows 18 years 5 months ago #481

Another solution is to disable Netbios over TCP (2000 and XP only)

Just see for yourself

Netstat -a

NOTICE the netbios entry

Now open your TCP/IP Properties-->Advanced-->WINS

There disable Netbios over TCP.

Now take a look again with netstat -A

Kind regards,

John Bruijntjes MCSE /CCNA

Message for LXS (see earlier posting).....everyone needs a change to learn so if you are so smart go ahead and answer some questions...answer them wrong and i flame you like hell!!! [img]images/smiles/icon_mad.gif[/img]

[ 23 June 2003: Message edited by: JJB ]
"Los Angeles, year 2029. All stealth bombers are upgraded with neural processors, becoming fully unmanned. One of them, Skynet begins to learn at a geometric rate. It becomes self-aware at 2:14 a.m. eastern time, August 29.

Ports open on Windows 18 years 4 months ago #482

The solution is very easy, just type in services.msc into the command prompt and disable the services you don't want running. There is a port tied to each service.

If you arent familiar with all the services, take a trip to and familiarize yourself with each one. You would be surprised at how many you can disable and still maintain functionality. [img]images/smiles/icon_smile.gif[/img]

I usually boot up with only 15 or 16 services at any one time.

Have fun.

[ 08 July 2003: Message edited by: FrameWork ]
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