I can only think that you might add something like:

send dhcp-lease-time 300;

to your dhclient.conf file, which is automatically generated by the 
interfaces_wan_dhcp_configure function in /etc/inc/interfaces.inc (for 
m0n0wall 1.22 anyway).

Hopefully someone has a more elegant solution.

Yamil Chamut wrote:
> Hi, first of all, sorry about my bad english :(
>
> The last month my ISP has started to have some problems, the modem looses the signal almost three
or four times a day, and it takes between 15 and 30 minutes to go online again. When this happens,
once the modem it's online again, i have to manually release and renew ip from m0n0wall web
interface, or wait to m0n0wall sends a dhcprequest, that means a couple of hours. It isn't a big
problem whem I am here, but when I'm not, my servers remains offline a couple of ours...
>
> The cuestion is, is there any way to modify the time between dhcprequest to my ISP?
>
>
> I can see this on the logs page:
>
> Feb 13 16:26:14 dhclient: bound to 24.232.66.192 -- renewal in 14900 seconds.
>
> So, if the modem drops the connection at 17:00, it will remain offline until 20:30?
>
>
> Thank you, and again, sorry about my english.
>
> Yamil Chamut
>