Yes that's the point,
I know you can map a mac address to ensure a static ip but my network admin
said this should not be necessary because of the 1 month lease on the
servers (running debian etch)

I must say I do not know how dchp works exactly, I am a poor web application
developer :-)

So finally I guess this is the standard behaviour of a dhcpd daemon, at
least on linux boxes?


2008/3/14, Chris Henry <>:


On Fri, Mar 14, 2008 at 9:13 PM, Cassiel <raffaele.morelli@xxxxxxxxx>
Every time I restart my Lenny I obtain a new ip addr from one of the 2
servers. We have a 1 month lease on this servers and this should never
happen within this period.

You can't guarantee what IP address you'll receive with DHCP. If you
wanted to ensure static ip on your host, you should the following
lines to dhcpd.conf on the DHCP servers (if it is a linux/UNIX-based

host <hostname> {
hardware ethernet <MAC address>;
fixed-address <IP address>;

That will ensure that your host (identified with MAC address) will
receive the same IP.

Does that helps? Or you have other intentions?


Relevant Pages

  • Re: [opensuse] ipv6 and routing
    ... MAC filtering has nothing to do with it. ... The only instance I can think of where a host ... The ISP uses DHCP to ... but IBM OS/2 Warp Server had a Dynamic DNS function, ...
  • Re: Blocking access to a network
    ... >> ending 5 so I think in theory no one else could connect to the router ... > to exploit a wireless connection is when limiting the number of DHCP ... MAC address. ... So the host is configured for DHCP for its IP assignment ...
  • Re: Deny DHCP IP to a certain MAC?
    ... You can use 'deny known clients', and then list all the MAC addresses you ... >>> 1- Can I prevent blank host names from getting a DHCP address? ...
  • Re: Blocking access to a network
    ... since the router is not a wireless router where a ... >> to exploit a wireless connection is when limiting the number of DHCP ... > configured to always assign the same IP address to a host based on its MAC ... that information is in the DHCP table and the IP is linked to the MAC ...
  • RE: mac to ip address tools
    ... Say host A on your net is trying to communicate with host B. Host A ... needs to know the MAC address for host B (or the MAC address for the ... ARP replies are no good for you - those are ... About 100 machines using the same MAC address: ...