On Wed, 27 Nov 1996, Sergio Untiveros wrote:
> Hi friends. I write from Peru South America. My question is follow:
> How Can we have more IP numbers in our site?, becuse the 254 numbers
> are used. We not have subnets.
Add a proxy server to your network by setting up a 486 machine with
FreeBSD from http://www.freebsd.org and then add the Squid caching
server from http://www.nlanr.net/Squid
Now assign all new machines IP addresses in the 10/8 network, i.e.
10.40.40.1 (see RFC1918 for details). These machines will not be able to
access the Internet directly but will be able to access http, gopher and
ftp resources via the Squid proxy. This is supported in Netscape and
in Internet Explorer as well as Lynx and all versions of Mosaic.
The users on the 10/8 network can have mailboxes on the FreeBSD server and
their email programs can be configured to send outgoing mail to the
FreeBSD server which will then deliver it.
The FreeBSD server will have two IP addresses, one from the assigned block
of 254 so it can access the Internet and one from the 10.40.40/24 network.
If you operate this proxy behind your firewall then you can use one
Ethernet interface with two addresses using the "alias" option of the
"ifconfig" command. Or you can configure the FreeBSD machine with two
Ethernet interfaces and configure it as a firewall. This requires turning
of packet forwarding (gateway=YES in /etc/sysconfig) and removing any
non-essential servives. You would also install the TIS firewalls toolkit
from ftp://ftp.tis.com/pub/firewalls/toolkit/README (make sure you get
both the toolkit and the documentation archives)
If you simply want to apply for more IP addresses then talk to your
upstream provider, RCP perhaps? However, if you use RFC1918 addresses
you would never have to ask for IP addresses again.
Michael Dillon - ISP & Internet Consulting
Memra Software Inc. - Fax: +1-604-546-3049
http://www.memra.com - E-mail: michael @