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 From:  sylikc <sylikc at gmail dot com>
 To:  Garrett <glc at c dash email dot com>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Forcing host to release/renew IP
 Date:  Tue, 16 Nov 2004 12:25:37 -0800

> Is it possible, via the webGUI, to force a host (or all hosts on the network/subnet) to
release/renew its IP?

You can't "force" your hosts to release their IP so to say, just
because of the semantics of the DHCP process.  Although JobOberio's
idea of setting the lease timeout down to 60seconds will effectively
get your hosts (starting from the next time they issue a renew) to hit
the server once at least every 60seconds (Windows hosts will renew at
half the lease time [30s]), you still can't force your hosts to renew
on demand.

Hosts will only renew their IPs when they need to (or on startup for
most hosts devices).  Therefore, even if you expired all the leases or
even shutdown the DHCP server (m0n0), the hosts would happily use it's
IP until it expires ;)