Asymmetric routing with FreeBSD on Amazon EC2 within VPC

[Patrick Gibson]

I'm wondering if anyone has managed to figure out a way to have an
Amazon EC2 instance behind a VPC work with multiple public IP
addresses? The issue is with asymmetric routing. It's been resolved in
the Linux world
(http://blog.bluemalkin.net/multiple-ips-and-enis-on-ec2-in-a-vpc/),
but I can't seem to get it working under FreeBSD. Using the setfib
command, I'm able to manually go out through either interface, but for
incoming packets to a webserver that listens to both interfaces, no
dice. :(

Patrick