[CentOS] control outgoing IP address?

[Kevin Thorpe]

Don't take this as a definitive answer, but I have multi-aliased CentOS 
boxen.

I find that outgoing connections always come from the main IP address, 
not the aliases. In particular these boxen are web servers hosting 
multiple sites, hence the multi-IP and connections to the database all 
appear to be from the main IP.

Applications can be attached to individual IPs, but I think the default 
routing is to use the main IP of the interface.