Re: [tsvwg] [port-srv-reg] draft-ietf-tsvwg-iana-ports-02

[Fernando Gont <fernando at gont.com.ar>]

Joe Touch wrote:

>> I wrote the patch to expand the ephemeral port number range in FreeBSD,
>> and the reason for which FreeBSD's ephemeral port range ended up being
>> 10000-65535 (rather than 1024-65535) was to avoid using those port
>> numbers used for X, http-proxy, etc. (This was a quick hack... a more
>> clean approach is described in draft-ietf-tsvwg-port-randomization). --
>> OpenBSD does implement that approach.
> 
> That technique doesn't expand the ephemeral range. It uses the reserved
> range as ephemeral, 

Did you mean "registered"?


> which will cause problems when ports in that range
> are allocated and you're already running a service on it.
> 
> It's not clean at all, and should be avoided, IMO.

Is this one of those "let's ignore the facts" speeches?

The very same Windows box you're using probably uses the range 1024-4999
for the ephemeral ports.

See the survey in the port-randomization I-D.

Thanks,
-- 
Fernando Gont
e-mail: fernando at gont.com.ar || fgont at acm.org
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1