Re: [cobalt-security] Might be off topic. Are computers with168.192.x.x safe from Internet?

["jwk at Zone Alpha" <jwk@xxxxxxxxxxxxx>]

----- Original Message -----
From: shimi <shimi@xxxxxxxxxxxxxxxx>

> TO MAKE SURE, you have to set YOUR ROUTER, that is, the one plugged to the
> switch, to accept all packets destinated to you (or, to even block some of
> them, for instance Netbios and stuff) - and all the others to be dropped.
>
> That way you can ensure that no packets will arrive to your 192.168 boxes.
>
> HTH,
>
> - shimi.

So, if I set up the router filtering rules so that it will accept traffics
only to my static IPs and block all others, will my private-IP-only machines
be safe from intruders?  Or could you perceive any possible way someone can
perhaps hack into public machines with telnet or ftp server and access
internanal Windows NT server?  Even with firewalls, if some hacker still
gets into public machines, are internal machines with only private IP
addresses vulnerable or are they ABSOLUTELY safe?  This question has been
bothering me and has forced me to keep the public and private segments
physically separated to date.

James Kim