Date: Sat, 9 Mar 2013 19:36:32 -0500 (EST) From: Daniel Feenberg <feenberg@nber.org> To: Modulok <modulok@gmail.com> Cc: "questions@freebsd.org" <questions@freebsd.org> Subject: Re: Revoke a DHCP lease early? Message-ID: <alpine.LRH.2.02.1303091919001.17168@nber7.nber.org> In-Reply-To: <CAN2%2BEpaTEA=faB7B-Q8b1BuKm%2BwvGG=g-SK9n6DhrMknGjsb1Q@mail.gmail.com> References: <CAN2%2BEpaTEA=faB7B-Q8b1BuKm%2BwvGG=g-SK9n6DhrMknGjsb1Q@mail.gmail.com>
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On Sat, 9 Mar 2013, Modulok wrote: > List, > > I'm running isc-dhcpd to serve leases to clients. Is there a way to expire a > lease before it normally would, i.e. force a client to re-negotiate a lease > early? Perhaps some shell command akin to the following (which would be nice, > but obviously doesn't work):: > > dhcpd --revoke 192.168.1.24 I am pretty sure there is no message the dhcp server can send to a client to request it give up its IP address unless the client has asked for an address or renewal. dhcpd is a server, it doesn't initiate commands. I expect that if you modified the entry in the dhcpd.conf file and restarted dhcpd that the client would be assigned (and use) a new address the next time it tried to renew (which is typically when half the lease has been used up). My view tends to be confirmed here - http://www.cites.illinois.edu/ipam/leases.html daniel feenberg > > How do you revoke a client's lease prematurely? > > Thanks. > -Modulok- > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >
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