Lease times and renewals [refer to Re: [Dnsmasq-discuss] Secondary/tertiary dns servers in dhcp offers?]

Rory Campbell-Lange rory@campbell-lange.net
Wed, 17 Nov 2004 13:14:15 +0000


On 16/11/04, Simon Kelley (simon@thekelleys.org.uk) wrote:
> Rory Campbell-Lange wrote:
> >I have the following main config:
> >
> >    dhcp-range=alien,10.0.0.226,10.0.0.245,4h
> >    dhcp-range=friend,10.0.0.75,10.0.0.225,24h
> >
> >and lost of entries along the following lines:
> >
> >    dhcp-host=00:03:93:C5:F1:C4,alexy,10.0.0.80 # (in the friend range!)
> >
> >However the clients (Macintosh OSX and OS9) appear to renew their leases
> >2 hourly. 

> Looks like there may be a confusion when both dhcp-ranges are on the 
> same subnet. I'll take a look. In the meantime, adding the lease time to 
> the dhcp-host lines will work-around this.
> 
> dhcp-host=00:03:93:C5:F1:C4,alexy,10.0.0.80,24h

I have added the work-around. Any news on the potential confusion you
refer to?

My plan is to move everyone in the office to a specified mac address/ip
address pairing, monitored by arpwatch, and then give unspecified hosts
an ip address which I will block from accessing the servers through
tcp-wrappers.

Just to check, I intend doing the following 

    dhcp-host=...10.0.0..50
    ...through to...
    dhcp-host=...10.0.0..150

    dhcp-range=alien,10.0.0.200,10.0.0.240

and blocking alien from the servers.

Is this likely to work?
Rory

-- 
Rory Campbell-Lange 
<rory@campbell-lange.net>
<www.campbell-lange.net>