[wellylug] IP addresses / per network card + routing + DNS
Richard
richard at redspider.co.nz
Fri Mar 19 17:03:00 NZDT 2004
> Hi All
>
> I need to know if a single 10/100/1000Mbps network card can have multiple IP
> address and then using routing and DNS put this out onto a network using
> another 10/100/1000Mbps network card routed to multiple servers (ie: 1 IP to
> each server) attached to a 10/100/1000Mbps switch.
To expand slightly on Daves reply with some specifics, if you have 1 IP to 1
Server, you can do it using a concept known as Network Address Translation.
In this concept, you supply the real IP addresses to the "external" interface on
the router/firewall machine, for example:
203.3.2.1
203.3.2.2
And then attached to the other "internal" interface, is the switch, with two
servers on it:
192.168.1.1
192.168.1.2
And we use 1 to 1 NAT (Available via iptables or iproute2 under Linux 2.4 or
2.6) to take traffic incoming for the externally visible 203.* addresses, and
send them to the correct internal 192.* addresses.
--
Richard Clark,
Analysis and Design,
Red Spider (http://redspider.co.nz/)
(+64) 021 478 219
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