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diegoecr
diegoecr
Explorer
May 21, 2018
Question

DHCP Server with "scheduled" lease time

  • May 21, 2018
  • 1 reply
  • 11321 views

Hello guy, I am facing this little difficult, I am trying to solve a problem which includes the lease time configured for 24 hours.

 

The idea is a daily procedure at specific hour, and I aint going to do that manually, I tried to configure it at the specified time

with 24 hours to lease the IPs, but, considering that it will work 24 hour-period starting for those who just connected in,

it will defeat the real purpose or the "scheme".

 

There is any way to automatize or set a fixed hour for this procedure?

(image below)

 

    1 reply

    ede_pfau
    SuperUser
    ede_pfau
    SuperUser
    May 21, 2018

    hi,

     

    let me suggest a different approach (as DHCP lease is a fixed duration, not a schedule):

    - hand out leases with 24x3600= 86400 seconds

    - put a schedule into the appropriate [strike]schedule[/strike] policy

     

    You need to make sure that the lease is longer than the scheduled interval - that's why I propose 24 hours.

    diegoecr
    diegoecrAuthor
    Explorer
    May 21, 2018

    yeah, I used the image just to simplify the idea, but anyway, I my doubt is, is it even possible?

     

    I know each device connecting at specific time, their IP will have different periods to be leased, I just

    imagined there would be anyway to schedule such thing, so every day at some specific time, the firewall

    would have to lease them all at once.

     

    But I think it would work only with a relay server, right?

    ede_pfau
    SuperUser
    ede_pfau
    SuperUser
    May 22, 2018

    Let me put it a different way:

    what is so important about a common lease start time and end time?

    For any control that I can imagine it's not the lease which is key but the policy allowing a host to transfer data. And for that kind of control there are schedules, to be applied to policies.

    Do you agree?

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