http://www.freebsd.org/doc/en/books/handbook/serialconsole-setup.html

[pete wright]

On Jun 25, 2013 9:25 AM, "Stephen Burke" <sburke at verizon.com> wrote:
>
> Does anyone know how I could push serial output to an IP port that I
> could SSH to?
>

Sounds like you are looking for something like SOL (serial over LAN) which
can be setup with IPMI.  Google should help you find more info on setting
up IPMI.

-pete