RE: Routers and firewalls

["Dean Smith" <ukha@xxxxxxx>]

The presence of NAT to hide the private subnet is indeed a large part of
the
security offered. Inbound connections then have to be specifically enabled
to a specific host.

However many of the All-in-one boxes allow you to setup a default host
insdide to receive all inbound connections. If this is used - all security
of the NAT routing fucntion is lost. You're then back to requiring a
firewall either on the router (or on the Target PC).

Dean

-----Original Message-----
From: Matthew Norman [mailto:mafiu@xxxxxxx]
Sent: 15 July 2003 11:05
To: ukha_d@xxxxxxx
Subject: [ukha_d] Routers and firewalls


Just continuing this theme of adsl and what is a router....

If you have an asdl router, and a private subnet ie 192.168.x.x, doesnt the
fact that you cant get to the private subnet from the internet act as a
rudimentary firewall?  Surely a pc on the private subnet (in the absence of
port redirection) is safer than a pc with an asdl modem attached directly?
Do I understand that right?

Matthew




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