nanog mailing list archives

Re: Is it time to block all Microsoft protocols in the core?


From: "Steven M. Bellovin" <smb () research att com>
Date: Tue, 28 Jan 2003 18:11:38 -0500


In message <20030128222210.GA84278 () pit databus com>, Barney Wolff writes:

On Wed, Jan 29, 2003 at 03:50:34AM +0545, Joe Abley wrote:

On Wednesday, Jan 29, 2003, at 01:25 Asia/Katmandu, Joe Abley wrote:

On FreeBSD, NetBSD, OpenBSD and Darwin/Mac OS X (the only xterms I 
happen to have open right now) this is not the case, and has not been 
for some time. I presume, perhaps na?vely, that other operating 
systems have done something similar.

This is not right. Guess I was typing "man" in the wrong xterms.

FreeBSD (4.x, 5.x) listens to the network by default (and can be 
persuaded not to with a "-s" flag). NetBSD (1.6) does the same.

You were right the first time, at least for FreeBSD.  The "-s" flag
is applied by default - see /etc/defaults/rc.conf .  Not quite as
idiot-proof as a compiled-in default, but way better than defaulting
to listening.

The same is true of NetBSD 1.6; look in the same place.


                --Steve Bellovin, http://www.research.att.com/~smb (me)
                http://www.wilyhacker.com (2nd edition of "Firewalls" book)



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