Hi all,
I currently have an iptables firewall for our DSL line. My ISP
informed me that I need to change my public IP address by the end of
month because AT&T is taking back a big block of addresses. I have all
of the new information (gateway, new IP address, DNS servers, etc.). I
host Web sites and email so my question is can I make the public IP
address change without a loss of service?
Here is what I am currently thinking of doing:
1) Add new IP address to eth0 on the firewall
2) Configure the firewall to route the new address traffic like it does
the old address traffic
3) Create new DNS records for all domains that I host to point to the
new IP address
4) Pray it all works!
My concerns are the following:
1) Will I be able to use two gateway addresses on eth0? (So that I
don't have traffic come in on one address and try to exit on the other)
2) My DSL "modem" is just acting as a pass-through bridge. Will I run
into problems using one physical line between my DSL modem and my
firewall for both sets of traffic (new and old IP addresses)?
What hints or pointers can you give me? I'm currently digging through
"multihomed" firewall information, but I don't see anything that speaks
about using just one Internet link and one network card to accomplish
what I'm after.
Thanks a bunch!
--
Travis Crook
Visions Beyond
www.VisionsBeyond.com
208-478-7836
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