Hi,
i would like to build a docsis-service witch is comparably to DSL/PPPoE-services. Therefore i would like to force to change the CPE IP every 24h.
Just to change the DHCP lease-time isn't the solution, because the CPE is asking the DHCP-server for the same address.
The DHCP-server should respond to the renew-request with another ip adress. But i dont't know how to do this with ISC DHCP server.
Is there a way to modify the IP adress negotiate process with ISC DHCP?
Any hints?
Paul
Why do you want to force an IP change?
DSL/PPPoE doesnt change its IP every 24hr (unless you are forcing a 24hour session length)
Are you worried about customers setting up mail/web servers etc? If so better off to use an ACL on the CMTS to block such servers from your dynamic IP ranges.
We would like to have the same terms and conditions for all access-systems. Yes we are forcing PPPoE to have a 24hour session limit. This is a nice differentiation feature for business customer vs. residential customers.
In my opinion is blocking traffic is never a solution for an 'free' internet access.
Hi Paul ...
I now having the same problem.
I´m testing to give many pools (maybe 5) in the same subnet and every 24h hours (cronjob) change the config-file of dhcp server and restart it. I test to deny all clients in the 1st pool after 24h in the 2nd and so on. I can´t say if this is the right way but i will try :).
best regards
Marek
Isn't this wasting of IP-Adresses?