Routing to correct incorrect local routes

[Cylindric]

Hi, I have a bit of an odd problem. We are transitioning from one DC to another, and have a bunch of IPs that we're taking with us. There is a pfSense in the source DC to act as an ipsec bridgehead.

The problem I have is that the IPs we've moved are still visible as "local" ips to pfsense, so I can't connect to the remote VPN endpoint, which is one of these IPs.

I need to 'force' pfsense itself to route all packets to the range a.a.a.0/21 to a specific router out on the internet, instead of the local default.

How do I change pfsense's own routing table so that it routes those packets?

On a Windows server I'd just use "route -p add a.a.a.a.0 mask 255.255.255.0 {remoterouterip}"

thanks!