Hi! I just want to share something about ip addresses.
Typically, what we do here if a franchisee wants to connect to our company
as an ISP we normally give the back to back ip address with subnet
255.255.255.252 for the router and number of ip addresses for their LAN
that includes the workstation and the dial-up subscribers.
My questions is that since proxy server can perform NAT. I can
use only one official ip address for my proxy server to translate all the
unregistered ip addresses on my internal network and just to use the
official ip addresses wisely, I will just give it to all my async ports
for the dial up users and that the subsribers will have a registered ip
addresses specified by my access server (router) facing the Internet.
With this kind of setup what are the limitations, if any?
Thanks in advance.
On Tue, 21 Oct 1997, Eric Vyncke wrote:
> As your proxy server can obviously perform NAT (Network Address
> Translation), you only need one official IP address for
> the proxy server.
> All your internal PCs can use 'illegal' IP addresses (or even
> better the 'private' addresses like 192.168.*.*) internaly.
> As people going to the Internet will use the proxy server,
> the source IP address of the IP datagram sent to the Internet
> will always be the one of the proxy server.
> BTW, even if you do not use the MS Proxy, you can still use
> the router used to connect to the Internet to perform NAT...
> Last paragraph probably bears my employeer flagrance ;-)
> Best regards
> At 11:17 21/10/97 +0300, Hisham Abdullatif Al-Rumaihi wrote:
> >We have Class C network, and we have 400 internet users, 150 of them not
> >using the internet, but they are using TCP/IP applications(Oracle).
> >We have DHCP server running on NT 4.0, and Proxy server running on NT
> >4.0 for accessing the internet through ip addresses.
> >The problem is we are running out of IP addresses, and not all the users
> >using the internet, is there a way to give the oracle users illegal ip
> >Please can anybody help us.
> >Thank you
> >Hisham Al-Rumaihi
> Eric Vyncke
> Technical Consultant Cisco Systems Belgium SA/NV
> Phone: +32-2-778.4677 Fax: +32-2-778.4300
> E-mail: evyncke @
com Mobile: +32-75-312.458