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Firewall Wizards: Re: COmpare Firewalls

Re: COmpare Firewalls

From: Darren Reed <darrenr_at_reed.wattle.id.au>
Date: Sat, 11 Sep 1999 05:29:59 +1000 (EST)

In some email I received from Robert Graham, sie wrote:
>
> --- Joe Ippolito <joe_at_joesnet.com> wrote:
> > I know that MS has addressed problems like "ping of death" to NT with
> > previous service packs; See
> > http://support.microsoft.com/support/kb/articles/Q132/4/70.asp for a really
> > old one. Does anyone out there know whether NT 4 SP5 (without MS Proxy's
> > packet filter) is still vulnerable to such attacks? Just curious.
>
> The IGMP fragmentation attack is post-SP5 and affected Win98 and Win2k. I've
> heard rumours that it also affected WinNT.

Doesn't the fact that the various Microsoft products all seem to have
problems with fragmentation ring any bells in people's heads about *bad*
IP implementation ? Seems to me like they push the defragmentation *up*
a layer (probably for some perceived speed advantage) and in doing so
have created the `same' problem in each of your TCP, UDP, ICMP, IGMP, etc,
rather than just once in IP.

Darren
Received on Sep 10 1999

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