Firewall Wizards mailing list archives
Re: Windows networking specifics (Was: re: Annoying pop-ups)
From: Mikael Olsson <mikael.olsson () clavister com>
Date: Wed, 30 Oct 2002 15:10:38 +0100
Luca Berra wrote:
Mikael Olsson wrote:Neil Ames wrote:[block port 139]This is somewhat disconcerting. [block port 445 too]there has been a precise question "which port is used for windows messaging popup, how do i stop it?" and a precise answer "port 139, icf". so please calm down.
Here's an abject lesson in windows networking: - Block port 139, tcp as well as udp Can connect to computer management interface Can connect to remote registry Can access all shares and printers "net send" works - Block ports 136-445, tcp as well as udp. Can authenticate and connect to f.i. exchange servers and other RPC services that do not require port 139/445 for auth. "net send" still works - Block ports 135-139, tcp as well as udp Can connect to computer management interface Can connect to remote registry Can access all shares and printers
btw icf is not that bad for a product embedded in a microshaft os stateful, blocks everything by default, so probably Neil's suggestion also answers your concerns.
http://support.microsoft.com/default.aspx?scid=KB;EN-US;q314757& Please study, in detail, the section that says "the ICF does not block incoming broadcast or multicast traffic", and especially the bit that explains how f.i. UPnP can be broadcast. [1] -- Mikael Olsson, Clavister AB Storgatan 12, Box 393, SE-891 28 ÖRNSKÖLDSVIK, Sweden Phone: +46 (0)660 29 92 00 Mobile: +46 (0)70 26 222 05 Fax: +46 (0)660 122 50 WWW: http://www.clavister.com [1] Broadcasts can be directed across the Internet, too. This is why smurf amplification works. _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: Annoying pop-ups, (continued)
- Re: Annoying pop-ups John Adams (Oct 29)
- Re: Annoying pop-ups Josh Welch (Oct 29)
- Re: Annoying pop-ups Gary Flynn (Oct 29)
- Re: Annoying pop-ups Crispin Cowan (Oct 29)
- Re: Annoying pop-ups Mikael Olsson (Oct 29)
- Re: Annoying pop-ups Gregory Austin (Oct 29)
- Re: Annoying pop-ups Mikael Olsson (Oct 29)
- RE: Annoying pop-ups Ames, Neil (Oct 28)
- Re: Annoying pop-ups Mikael Olsson (Oct 28)
- Re: Annoying pop-ups Paul D. Robertson (Oct 29)
- Re: Annoying pop-ups Luca Berra (Oct 30)
- Re: Windows networking specifics (Was: re: Annoying pop-ups) Mikael Olsson (Oct 30)
- Re: Danger of telnet on w2k (Was: re: Annoying pop-ups) Mikael Olsson (Oct 30)
- Re: Annoying pop-ups Mikael Olsson (Oct 28)
- RE: Annoying pop-ups Ames, Neil (Oct 29)