All you should need to do is update DNS records to point the web sites to the new IP address. Then just make sure the IP is reachable from the outside.
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Multiple External Networks on Single Web Server
I'm in the process of migrating from one network provider to another. For a short time, I need to run both the new network and the old network on our webserver simultaneously.
I'm running 2 NIC cards
-- NIC #1 is New Network set as default gateway - 74.248.10.31 - default gateway/router is 74.248.10.1
-- NIC #2 is Old Network with no default gateway - 66.100.10.149 - router is 66.100.10.129
I've attempted to add a static route for NIC #2: route -p add 66.100.10.0 mask 255.255.255.0 66.100.10.129 metric 20.
This is unfortunately not working. Our sites that are still on the old network keep dropping in and out. Please note that for now, until I get things right, I've set both NIC's with default gateways which I know is a no-no. Intermittent connectivity is better than none at this stage of the game!
I can access the sites (that are still on the old network) from our internal network (which is firewalled behind an "old network" IP address) but cannot access them externally (when default gateway is removed on NIC #2).
The new network (NIC #1) is successfully being accessed externally (since it's the default gateway).
Would anybody know the proper configuration for this type of setup? If this looks right, hopefully someone could verify this just so that I could look somewhere else for the possible cause.
Any help would be greatly appreciated.
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by: DBrookfieldPosted on 2006-12-15 at 10:36:42ID: 18147946
I had to do this a while ago, the way I did this was putting in place two firewalls (a router would be fine, I used a firewall as the websites are public facing but with private addreses behind). I used two Nics. Firewall 1 had old network Firewall 2 new network both firewalls plugged into the same switch with all :80 traffic directed to Nic 1 and Nic2 with the appropriate forwarders and all outgoing traffic was sent through new Gateway. Worked fine for me. As this was all in the same rack there was no crazy routing needed.