Date: Wed, 9 May 2007 13:22:17 +0100 From: RW <fbsd06@mlists.homeunix.com> To: freebsd-questions@freebsd.org Subject: Re: ip refresh, resolv.conf and local scripts on startup? Message-ID: <20070509132217.010c71af@gumby.homeunix.com.> In-Reply-To: <dedb607c0705081411i287cd4e6ue8f9dd8afc5753a8@mail.gmail.com> References: <dedb607c0705081411i287cd4e6ue8f9dd8afc5753a8@mail.gmail.com>
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On Tue, 8 May 2007 16:11:21 -0500
"Jack Barnett" <jackbarnett@gmail.com> wrote:
> I have a script that updates some dynamic DNS records (can be run as
> non-root if needed).
>
> It needs to be run on startup - after network is configured and after
> rc.firewall (it'll get blocked if it's run before the firewall is
> setup).
>
> What is a good place to put this? I could put it at the end of
> rc.firewall, but is there a better place to put it?
This is a problem that people see when they need to update a local
dhcp server on a machine that gets its own settings by dhcp. Try google.
> Also how do I refresh a dynamic IP without rebooting?
>
> Sometimes my cable modem gets messed up and under windows I just do:
> ipconfig /release
> ipconfig /renew
>
> and it gets new IP and sets everything up. In FreeBSD is there a way
> to reconfigure everything without rebooting?
/etc/rc.d/dhclient restart
should do it
> (rc.firewall uses this to get network info:
> onet=`ifconfig xl0 | grep "inet " | awk '{print $6}'`
> oip=`ifconfig xl0 | grep "inet " | awk '{print $2}'`
> Meaning, rc.firewall would also have to be re-ran if the IP is new).
> [also to make things more complicated, I think I need a rule in
> rc.firewallto allow for DHCP clients to go out? It gets blocked on
> external interface
> when firewall comes up??]
I doesn't appear to matter, I think dhclient bypasses the firewall. at
least that's my experience with PF.
> Also how do I override /etc/resolv.conf? DHCP client configures it I
> think and sets it up to point to my ISP DNS servers (which suck) and
> would like to give it mine instead of there, but it keeps getting
> over written on startup when it gets a DHCP lease?
See dhclient.conf(5) for how to control what DHCP does to resolv.conf,
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