On 5/9/2011 11:25 AM, Andrew Deason wrote: > On Mon, 09 May 2011 11:03:42 -0400 > Jeffrey Altman <[email protected]> wrote: > >> The port number used is irrelevant. The question is whether the >> firewall or NAT keeps the port open or not. There is no guarantee >> that a client will use port 7001 either. That is simply the standard >> port. > > Yes, but it seems unlikely that a client that is using 7001 would need > keepalives to keep a port mapping active. It's not perfect, but I was > just trying to think of a way of reducing the potentially huge increase > in unnecessary traffic (and CheckHost_r delays) for sites that don't > have any NAT clients and don't care.
Most NATs assign the requested port on a first come first serve basis. Firewalls that only open ports in response to outgoing traffic will also require this functionality.
signature.asc
Description: OpenPGP digital signature
