This is the script I use to accomplish this. Just substitute the network
card interface code with the one you wish to have renewed.
I run this every 24 hours, and have been able to keep the same IP address
for going on 6 months now. It also generates a handy Email to root when
run from /etc/crontab, so that you can review the renewal information,
verify your ifconfig settings for that network card, and your change in the
IP lease.
#!/bin/sh
#
# Restart DHCLIENT and reconfigure ifconfig ...
#
SHELL=/bin/sh
PATH=/etc:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
HOME=/var/log
echo " "
echo "************************************************************"
echo "Started DHCLIENT update: `date \"+%Y-%m-%d %H:%M:%S\"`"
echo "************************************************************"
echo " "
kill -TERM `cat /var/run/dhclient.pid`
echo "DHCP Killed, restarting"
echo " "
/sbin/dhclient xl0
echo " "
sleep 10
ifconfig xl0
echo " "
more /var/db/dhclient.leases
echo " "
echo "************************************************************"
echo "Finished DHCLIENT update: `date \"+%Y-%m-%d %H:%M:%S\"`"
echo "************************************************************"
echo " "
At 12:51 07/11/2002, Mikel King wrote:
>Not sure if you've found this already. One thing I used to do on an older
>box was a simple cron job that ran a script which HUP'd the dhclient every
>so often thus effectively renewing the lease...
>
>If memory serves me it went something like....
>
> #!/bin/sh
>
> kill -HUP `ps ax |awk '/dhclient/{print $1; exit}'`
>cheers,
>mikel
>
>nascar24 wrote:
>
>>Hallo,
>>
>>My FreeBSD 4.5-RELEASE machine is connected to the internet via a cable
>>connection. And when booting (or running dhclient) I get an IP address.
>>But when I have an IP address and my ISP wants to give me a new IP
>>address I doesn't go the way it should. Because I don't get the new IP
>>address, my machine continues to use the 'old' IP address. And when that
>>happens I get an angry phone call from my ISP, and they shut me from
>>internet for a day.
>>
>>So, how can I configure (dhclient.conf I guess) my machine so that it
>>accepts this new IP address. I thought I would configure my machine so
>>that it renews its lease every 10 hours. But I have read the man for
>>dhclient.conf, dhcp-options and dhclient but I still am puzzled.
>>
>>Gr.
>>
>>Marcel.
>>
>
>Cheers,
>Mikel
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