Re: Securing against an internet based intrusion
- From: Ron Martell <ron.martell@xxxxxxxxx>
- Date: Fri, 24 Feb 2006 19:40:49 -0800
Ari <nomail@xxxxxxxx> wrote:
We have DSL, there is a rumored hardware firewall in the modem. I
don't know if it's effective, but we use Zone Alarm software firewall
too.
DSL modems are not likely to incorporate a firewall, but a DSL
modem-router combination would almost certainly include NAT (network
address translation) which is at least 99 and 44/100% effective as a
hardware firewall. Theoretically it is breachable but I have never
heard of an actual successful malicious attack.
If your DSL modem has a DHCP server that allocates non-routable i.p.
addresses to your network computers (e.g. addressess in the
192.168.xxx.yyy range) then it undoubtedly has NAT as well. However
if you are using fixed local i.p. addresses or if you have a computer
on the network configured as a DHCP server then your modem may not
have NAT.
4 port Cable/DSL routers are basically cheaper than dirt right now so
if you don't have this functionality on your network it might be worth
considering.
Good luck
Ron Martell Duncan B.C. Canada
--
Microsoft MVP (1997 - 2006)
On-Line Help Computer Service
http://onlinehelp.bc.ca
"Anyone who thinks that they are too small to make a difference
has never been in bed with a mosquito."
.
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