nanog mailing list archives

Re: Anit-Virus help for all of us??????


From: "Stephen J. Wilcox" <steve () telecomplete co uk>
Date: Mon, 24 Nov 2003 21:50:48 +0000 (GMT)


On Mon, 24 Nov 2003, Gerardo Gregory wrote:

# Machine behind NAT while it is being updated

NAT is not a security feature, neither does it provide any real 
security, just one to one translations.  PAT fall into the same 
category.  Just cause your broadband router (ahem, switch) vendor states 
that NAT (in reality PAT) as one of their security 'knobs' does not make 
it in any way a security feature when implemented.  Only thing that 
might benefit is IPv4 address space.

Make a NAT Translation to a workstation (nothing else) and see if you 
can still carryout some of the exploits making the rounds.

Nor does it stop the user inviting an exploit to run on their PC, eg web 
download, email attachment.. based on seeing plenty of virused/exploited 
machines at companies I've worked at which all had AV, FW, NAT etc they still 
had the human factor who would override a warning because they got sent what 
looks like a joke email with an attached .scr that later turns out to be a new 
virus/worm..

Steve


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