Say I have a main server Ip address of (This is completely made up) 209.190.53.51, and I have 32 IP addresses blocked to it on 209.51.193.32-64 (or whatever, this is an example) would this alias line still be valid for that? I've never done a server where the MAIN IP and the aliased IPs were on different IP classes.
ifconfig_fxp0_alias0="inet 209.51.193.32 netmask 255.255.255.0" (is an example of what im using for the aliases.)
Is there something special I need to do since these aren't on the same net?
No, you can just use the regular netmask for the first IP in a new subnet. It's only when you have more than one IP in the same subnet that you need to use 255.255.255.255 (or 0xffffffff, which I prefer) as a subnetmask.
