Re: Blocking NetBios

From: cert (kitty_at_cert.org.cn)
Date: 06/12/04

  • Next message: cert: "Re: Blocking NetBios" 
    To: "Andrew Shore" <andrew.shore@holistecs.com>, "Kareem Mahgoub" <kareem@thewayout.net>, <security-basics@securityfocus.com>
Date: Sat, 12 Jun 2004 15:13:54 +0800

    How can I know if NetBios of my system is available or not ? Whether typing command "netstat -an" to see if the port 139 is open or not?
    Then what are the port 135, 137,138, 445 used for? After disable the TCP/IP--> Win--> over TCP/ip NetBios , only 139 is disabled.
    who can explain it?

    Best Regards,
    Kitty Li
    Venus Ltd.

    ----- Original Message -----
    From: "Andrew Shore" <andrew.shore@holistecs.com>
    To: "Kareem Mahgoub" <kareem@thewayout.net>; <security-basics@securityfocus.com>
    Sent: Friday, June 11, 2004 3:29 PM
    Subject: RE: Blocking NetBios


    > >From Windows 2000 onward it is possible to turn off Netbios on the
    > clients. However, many network applications will stop working ~(even
    > some of Microsofts!)
    >
    >
    > Andrew Shore
    > Senior Security Specialist
    > DDI. 01302 308 165
    > andrew.shore@holistecs.com
    >
    >
    >
    > Company Number 04943010
    > VAT Number 828 8635 82
    >
    >
    > Holistic Technologies Ltd
    > Unit 7 Shaw Wood Business Park
    > Shaw Wood Way
    > Doncaster
    > South Yorkshire
    > DN2 5TB
    > T. 0870 240 1442
    > F. 0870 240 1443
    > www.holistecs.com
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    >
    > -----Original Message-----
    > From: Kareem Mahgoub [mailto:kareem@thewayout.net]
    > Sent: 10 June 2004 09:21
    > To: security-basics@securityfocus.com
    > Subject: Blocking NetBios
    >
    > Hi list,
    > I have a request from one of our clients to block NetBios in thier
    > Network
    > ( No one should be able to see the shared resources of others)
    > I have googled around and all what I have found is blocking it on the
    > edge
    > communication equipment ( router, xDSL modemd..etc) Which will be done.
    > The most important thing is to disable it internally ( inside the LAN)
    > Any suggestions???
    > Taking in consideration that there is DHCP server for the clients ( If
    > it
    > can contribute in the Solution)
    > Best Regards,
    > Kareem Mahgoub
    >
    >
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