socket / bind - specific address

Vince Hoffman jhary at
Sat Feb 25 13:43:50 PST 2006

On Sat, 25 Feb 2006, Brian Candler wrote:

> On Sat, Feb 25, 2006 at 06:07:22PM +1100, Edwin Groothuis wrote:
>> The situation is as follows:
>> We have a couple of FreeBSD routers, with RFC1918 addresses on the
>> ethernets and a public address on the loopback. This works fine for
>> connecting to the routers, but is problematic for locally originated
>> outgoing traffic (think NTP, think syslog): it takes the IP address
>> of the outgoing interface, which is the RFC1918 address.
>> Is there a way (sysctl, kernel option) to define which IP address
>> is used for locally originated outgoing traffic?
> One way is to run your daemon (ntpd, syslogd etc) within a jail, and give
> the jail your public loopback as its IP address.
> Another is just to configure each daemon to bind to the appropriate port, if
> it supports that option. syslogd has a '-b' flag; I don't know if ntpd can
> be configured thusly.

I seem to recall openntpd can be but I dont think the standard freebsd 
ntpd can. I have never tried openntpd on freebsd though (it is in ports.)


> Regards,
> Brian.
> _______________________________________________
> freebsd-net at mailing list
> To unsubscribe, send any mail to "freebsd-net-unsubscribe at"

More information about the freebsd-net mailing list