Re: DHCP

["Michael J. McGillick" <mike universe ne mediaone net>]

Philippe:

With my ISP, they have the DHCP, not me.  It's like me and everyone around
me is on a giant network.  So, to avoid allowing other "customers" in my
same area access, I need to block them out.  The easiest way to do this is
to deny access to everyone to start, and then open what I need to allow
in.  Obviously, one of the machines I need to allow in is the DHCP server
itself.  If it needs to renew my lease, or something, it needs to be
allowed access through.

I hope this is a little clearer.

- Mike

On Sun, 2 Jan 2000, Philippe Moutarlier wrote:

> 
> I have the same kind of setting but I don't really understand what you mean by "needing dhcp server" .
> 
> Could you precise what you want to do ?
> 
> My example : my firewall is the router with the dhcp assigned ip. Behind it I have 4 machines running in a private network. All machines are masqueraded so they get access to internet as well.
> 
> Philippe
> 
> 
> "Michael J. McGillick" <mike universe ne mediaone net> writes:
> 
> > Evening Everyone:
> > 
> > I have a cable modem that I use for my Internet connection.  My service is
> > with Media One here in Massachusetts.  My connection is working just
> > fine.  At boot-up, I have my system configured to use DHCP to get my IP
> > Address.
> > 
> > I'm currently working on my firewall, and one of the things I need to
> > allow through is my DHCP server.  After the machine boots up, and
> > establishes an Internet connection, is there a file on my system that
> > tells me what DHCP server I'm talking to?  I know resolv.conf shows the
> > addresses of the nameservers, and my ipchains script nicely parses this
> > information out and allows access to it, but I need to determine the DHCP
> > server, and any other ports I may need to leave open for it.
> > 
> > Thanks.
> > 
> > - Mike
> > 
> > 
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> 
> 
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