[ale] NTP...

[roberth1954 at aim.com]

I can't seem to find it now but, once upon a time I could sware I read 
where the latest version of ntpd would automatically use 
non-priviledged ports if it was operating as a non-root user. (ntpd -u 
ntp) I think this is why ntpd on my linux hosts can get around my 
Linksys router.


-----Original Message-----
From: Joe Steele <joe at madewell.com>
To: ale at ale.org
To: Atlanta Linux Enthusiasts <ale at ale.org>
Sent: Tue, 25 Apr 2006 13:16:37 -0400
Subject: Re: [ale] NTP...

  Michael B. Trausch wrote:
> Oy... well, perhaps, then, I'm going to just cron the ntpdate -u 
command...
> lol.  I am behind two routers, and even the DMZ'd machine has 
problems with
> all of this:
>


There is another solution that you could use -- change the port numbers
using iptables:

iptables -t nat -I POSTROUTING -p udp --source-port ntp -o eth0 -j SNAT
--to-source 192.168.0.3:1024-65535

That should force ntpd to behave the same as ntpdate with the -u option.

--Joe
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