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Re: NAT with cable modems - dynamic IP

john Buxton <john@teletrak.com.au> writes:

> I am wondering how OpenBSD works with a cable modem installation running
> dynamic IP.


> Will I have to reload ipnat or reboot the computer if the address
> changes, or can it detect the changed address and continue working?

kwooding@codetalker.com writes:

> At the moment, it doesn't.  You need to reload your ipf and ipnat
> rules (manually) if your IP address changes.  Ideally, dhcp should be
> scriptable to perform these actions for you whenever a new lease is
> received.

dhclient *is* currently already scriptable. Just make your own version
of the /sbin/dhclient-script and point the /etc/dhclient.conf file at
it. I think an "ipf -y" at a strategic place in the script, should
do. In the ADSL NAT gateway I've set up at work, it seems fine,
although the IP rarely (if ever) actually changes.

Best wishes,

Daniel Neri