Re: Security Questions

From: NeoSadist (Ne0$@d1$t)
Date: 09/02/02 

From: "NeoSadist" <Ne0$@d1$t>
Date: Mon, 2 Sep 2002 08:59:38 -0600

"Evan Camilleri" <evan.nospam@holistic.com.mt> wrote in message
news:urWwJ1kUCHA.2716@tkmsftngp12...
> My network uses NAT. What are my security loopholes? How can I check if
> there is a possible attack? Can I know who is accessing my system, and
what
> is being accessed?
> How can I disable access to my network for an ip or range of ip?
>
> Evan
>
>

NAT is only address translation. I think it blocks nearly all trojans from
contacting their home, but I'm not so sure. I'd strengthen the security of
the computers themselves. Also, try getting a router or gateway with more
than just NAT. If you want to know if someone is accessing your system,
turn auditing on (win2k), and watch your internet traffic logs for inbound
and outbound traffic. If you see a lot of incoming traffic from the same IP
or similar IP class, it could be an attack.
If you want to disable access to your network from an ip or ip class, you
need to specify this in the router, or get software firewalls for your
computers and do it that way (norton personal firewall, corporate edition).
Are you a home user or a business admin? If only a home user, just make the
computers stand-alone boxes by telling win2k (or whatever you use) to not
allow access from the network. If a business admin, I'd say ask Symantec
(if you have the money), or just hang out at hacker newsgroups (but don't
post) and listen to see if new hacks or exploits come about. Check other
security sites often. There's this place called SANS.org (I think) that you
can register with and read up on security. The more you know, the better.

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