IP fast forwarding and setkey

[Olivier Cochard-Labbé]

On Sun, Sep 21, 2014 at 12:08 PM, Paul S. <contact at winterei.se> wrote:

> Hi folks,
>
> I plan to make an edge router out of a freebsd system with OpenBGPD +
> FreeBSD 10, or such.
>
> I've been reading up, and noticed that the net.inet.ip.fastforwarding flag
> provides rather nice performance benefits.
>
> My issue is, my upstream networks insist on using TCP MD5 authentication
> on their BGP sessions.
>
> This is fine, except on FreeBSD -- I'm going to have to use the setkey
> utility to set those since native PF_KEY support for OpenBGPD does not seem
> available.
>
> Now, since setkey is part of IPSec, and there are countless warnings about
> using IPSec and fastforwarding together in the manpage, am I correct in
> assuming that this will not work if I have fastforwarding enabled?
>
> Is there any way to make it work? Quagga, from what I've read, seems to
> also be in the same boat (Usage of setkey required for TCP MD5).
>
>
fastforwarding is not compatible with IPSec only but can be used with
TCP_MD5 without problem (tested on FreeBSD 10-stable).

Regards,

Olivier