Re: [Ntp] [Tsv-art] Tsvart early review of draft-ietf-ntp-alternative-port-02

[Hal Murray <[e-mail]>]

> Why would that be? NTP has a port that is widely deployed.

Yes, and widely filtered.

> The same happened with EDNS0. Firewall administrators had to
> go in and adjust their filtering.

You said "firewall".  I've been using "filter".
I think of a firewall as something the local administrator controls.

The filters I'm interested in are undocumented.  Both location and
details of what they do are unknown.  They generally are located
"out there" someplace on a system that is not run by the ISP at
either end.


> They don't need to remove filters as much they need to change them. Are 
> you saying that the alternate port would not be filtered?

The filters I'm talking about are for UDP port 123 and usually
something about length and/or mode.

If NTP gets a new port it will start out unfiltered.  As long as we
don't screwup, there will be no reason to add filters for the new port.