Best utilizing fat long pipes and large file transfer

Stuart Henderson stu at
Fri Jun 13 21:40:43 UTC 2008

On 2008-06-12, Kevin Oberman <oberman at> wrote:
> The idea is to use tuned proxies that are close to the source and
> destination and are optimized for the delay.

OpenBSD has relayd(8), a versatile tool which can be used here.
There is support for proxying TCP connections. These can be modified
in a few ways - socket options (nodelay, sack, socket buffer) can
be adjusted on the relayed connection, also SSL can be offloaded.
It works with the firewall state table and can retain the original
addresses. Parts of this are only in development snapshots at present
but will be in the 4.4 release.

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