On Tue, May 8, 2012 at 3:42 PM, Derrick Brashear <[email protected]> wrote:
> On Tue, May 8, 2012 at 3:39 PM, Brandon Allbery <[email protected]> > wrote: > > On Tue, May 8, 2012 at 2:27 PM, Derrick Brashear <[email protected]> > wrote: > >> the surprising thing is NAT ping should keep the port open unless > >> 1) the timeout interval is aggressively short, like, 20 seconds. > >> 2) there's a hard timeout on NAT at least for UDP where regardless of > >> use, you lose your timeout. > > > > 3) your NAT device has a very small table for UDP mappings, which at > least > > some of the commercial boxes do; overflowing will cause mappings to be > lost, > > typically in LRU fashion. > > indeed, i forgot (to mention) that. but it happens. Mostly I mentioned because (and I forgot to note this) NAT ping won't help in that case; if anything, it might make triggering it that much more likely to happen sooner rather than later. -- brandon s allbery [email protected] wandering unix systems administrator (available) (412) 475-9364 vm/sms
