Is it possible to configure an Apache (v2.x, running under Plesk 10.4.4) virtual host to listen to two IP addresses at once? We are moving a site from one IP on the server to a different IP (so that we can install an SSL - SNI isn't an option, unfortunately) and would like the site to remain active on both IPs to avoid downtime until the DNS changes complete.
So at the moment it's on, say, 1.1.1.1 - we'd like it to continue working on 1.1.1.1 but ALSO work on 1.1.1.2 at the same time until DNS finishes, then it can just be 1.1.1.2.
Is this as simple as copying the Virtual Host entry and changing the IP or is there more / less to it than that?