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Date:      Tue, 19 May 2015 20:56:34 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Patrick Gibson <gibblertron@gmail.com>
Cc:        FreeBSD Questions Mailing List <freebsd-questions@freebsd.org>
Subject:   Re: Asymmetric routing with FreeBSD on Amazon EC2 within VPC
Message-ID:  <CAJ-VmonuKYT6kSgOoV5amavqBfGLyjb5aL5yAcm7k7suRxiemw@mail.gmail.com>
In-Reply-To: <CA+dWbmasJas+yA40unSYooWdkn10pS=jhsQC2VkwXW1GmiBMRQ@mail.gmail.com>
References:  <CA+dWbmasJas+yA40unSYooWdkn10pS=jhsQC2VkwXW1GmiBMRQ@mail.gmail.com>

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Hi,

So the "freebsd clean" solution would be to create two listen sockets,
one per IP address, and and have each IP address / routing table in a
separate FIB, or separate vnet.

I don't know if anyone has set that up though. It would be nice to
teach some web servers and proxy serversabout FreeBSD FIBs.



-adrian


On 19 May 2015 at 12:22, Patrick Gibson <gibblertron@gmail.com> wrote:
> 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
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