Re: Please Help me to block the hackers

From: Karl Levinson [x y] mvp (levinson_k_at_despammed.com)
Date: 06/17/03 

Date: Tue, 17 Jun 2003 14:44:55 -0400

It's typical to use a firewall and NAT with private IP address ranges.
these private ranges are not routable on the internet and MUST go through a
NAT device in order to reach the internet. This can make it more difficult
for compromises to occur in some cases, and also the use of the NAT device
can help you have more granular control over what ports and IP addresses are
open. With no firewall or private NAT space, any and every port on your
computers with publicly routable internet IP addresses is potentially
reachable and usable without restriction to and from the internet. NAT in
itself is not a firewall, but is useful.

Free and inexpensive firewalls you might choose are listed here:

http://securityadmin.info/faq.htm#firewall
http://securityadmin.info/faq.htm#harden

"rizwan" <rshakeel@yahoo.com> wrote in message
news:001901c334f3$d38127a0$a501280a@phx.gbl...
> Dear,
> If you don't mind could you explain it what happen when we
> change our private IP ranges.
>
> Thanks
> Rizwan
>
> >-----Original Message-----
> >Implement a firewall. It's a must. Use VPN to connect
> your sites over the
> >Internet. Preferably change to private IP ranges.
> >
> >--
> >Svyatoslav Pidgorny, MS MVP, MCSE
> >-= F1 is the key =-
> >
> >"rizwan" <rshakeel@yahoo.com> wrote in message
> >news:0dc901c334a7$d5f3e6e0$a501280a@phx.gbl...
> >> Dear All,
> >> First of all I want to explain my network senario, we
> are
> >> using windows NT 4.0 PDC server with exchange server 5.5
> >> with X.400 connector for replication between our two
> >> office.We are connected to internet with dialup account
> >> with static IP and we are not using firewall , But We
> have
> >> implemented restriction on our PDC server for our users.
> >>
> >> I have some problem from few days that some internet
> users
> >> are trying to login on my windows NT PDC server through
> my
> >> PDC users but they are unablt still to login, but they
> are
> >> continous trying to do this.
> >>
> >> My question is this how can I block these internet
> hackers
> >> to try to login on my PDC server through my PDC users.
> >>
> >> If any one have Idea about it, please inform me
> immediatly.
> >>
> >> Thanks
> >> Rizwan
> >>
> >>
> >>
> >
> >
> >.
> >

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