[jdev] XMPP Ping/Keepalive: Recommended method ?

[Bruce Campbell]

On Tue, 27 Jun 2006, Joe Hildebrand wrote:

> Date: Tue, 27 Jun 2006 05:59:54 -0600
> From: Joe Hildebrand <hildjj at gmail.com>
> Reply-To: Jabber software development list <jdev at jabber.org>
> To: Jabber software development list <jdev at jabber.org>
> Subject: Re: [jdev] XMPP Ping/Keepalive: Recommended method ?
> 
> On Jun 27, 2006, at 4:09 AM, Bruce Campbell wrote:
>
>>> Well, not really.  You'll get a TCP ack back, which should be enough to 
>>> keep the lights on.
>> 
>> Not if you are dealing with inspection-type firewalls which don't really 
>> treat a TCP ACK as a data packet.
>
> If firewalls did this, TCP would *break* for all applications.  Can you 
> please give a concrete example of a firewall that has this property?

Not a firewall appliance, but 'interesting' configurations with ISPs 
seeking to keep their dial-up lines/wavelan channels free (timers on their 
end were only reset on certain types of packets, which did not include tcp 
acks).

-- 
   Bruce Campbell