ADSL Internet Sharing + Lan

Archived from groups: microsoft.public.windowsxp.security_admin (More info?)

Hello,

I've recently gone from 'Dial Up' to 'Adsl' & im curious about what
would be the best way to intergrate my Lan with my ADSL connection so i can
have complete access to my current lan & also have each client connect
directly to ADSL.
Im connecting via a "Linksys 'router'" & all that is working fine,
each one of my clients get's it's IP via the 'linksys DHCP', Im running
XP-SP2 with all the latest patches,norton 2005 & Zonealarm Pro on all
client's- my issue being is that if i set my clients to receive a DHCP then i
can access ADSL but it kills all the configuration on my Lan (which includes
'Vmware' servers which i use for piloting & ghosting clients , aswell as a XP
File Server & also a few printers i have printing via Manual IP (So in the
end I'm sacrificing one for the other) > as the DHCP is on a class C with
192.168.1.X & my Lan is on a class c but with 10.0.0.X - I'm not all that
fluent with security so my questions are...
Is it true & correct that 'Private IPs ' with 192.168.X.X & 10.0.X.X cannot
be routed & therefore internet users cannot ping nor see my Lan clients ? The
only way i can think to get around this is by adding an additional NIC on
each client but i dont belive it to be the most cost efficient solution -
need advice or at least a point in the right direction.
I certainly dont want be hacked as much as anybody else however security
should'nt mean that life is made more difficult - any advise would be highly
appreciated.
1 answer Last reply
More about adsl internet sharing
  1. Archived from groups: microsoft.public.windowsxp.security_admin (More info?)

    From: "droids" <droids @discussions.microsoft.com>

    | Hello,
    |
    | I've recently gone from 'Dial Up' to 'Adsl' & im curious about what
    | would be the best way to intergrate my Lan with my ADSL connection so i can
    | have complete access to my current lan & also have each client connect
    | directly to ADSL.
    | Im connecting via a "Linksys 'router'" & all that is working fine,
    | each one of my clients get's it's IP via the 'linksys DHCP', Im running
    | XP-SP2 with all the latest patches,norton 2005 & Zonealarm Pro on all
    | client's- my issue being is that if i set my clients to receive a DHCP then i
    | can access ADSL but it kills all the configuration on my Lan (which includes
    | 'Vmware' servers which i use for piloting & ghosting clients , aswell as a XP
    | File Server & also a few printers i have printing via Manual IP (So in the
    | end I'm sacrificing one for the other) > as the DHCP is on a class C with
    | 192.168.1.X & my Lan is on a class c but with 10.0.0.X - I'm not all that
    | fluent with security so my questions are...
    | Is it true & correct that 'Private IPs ' with 192.168.X.X & 10.0.X.X cannot
    | be routed & therefore internet users cannot ping nor see my Lan clients ? The
    | only way i can think to get around this is by adding an additional NIC on
    | each client but i dont belive it to be the most cost efficient solution -
    | need advice or at least a point in the right direction.
    | I certainly dont want be hacked as much as anybody else however security
    | should'nt mean that life is made more difficult - any advise would be highly
    | appreciated.

    That's why they call it Pivate Adressing !

    The Router uses Network Address Translation (NAT) and becuase of this NAT acts as a
    simplistic FireWall.

    However, to increase your security, I always suggest that you block both TCP and UDP ports
    135 ~ 139 and 445 on *any* SOHO Router.

    --
    Dave
    http://www.claymania.com/removal-trojan-adware.html
    http://www.ik-cs.com/got-a-virus.htm
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