local dns problem

[Paul Howarth]

Gene Heskett wrote:
> On Friday 04 August 2006 08:34, Paul Howarth wrote:
>> Gene Heskett wrote:
>>> Greetings;
>>>
>>> My local home network runs with most of its machines having fixed
>>> addresses, referenced in their host files.
>>>
>>> But I do have a dhcp server setup for when ever my lappy is powered up
>>> and logs in thru a wap11 from its builtin broadcom radio.
>>>
>>> How can I rig my dns lookups so that I can still ssh into this lappy by
>>> its name, diablo.coyote.den when its given a dynamic address by dhcpd? 
>>> As it is, I have to goto the lappy and run an ifconfig to find its
>>> address and ssh to that.  Cumbersome.
>> Might be easier to have your DHCP server assign your laptop the same
>> address every time. That's what I do on my home network.
>>
> I'd assume that would be by linking the MAC address to its host file 
> address somehow, but I'm afraid I need tutoring on that.

You do use the MAC address, yes. The dhcpd.conf file maps a MAC address 
to an IP address, and your hosts files do the mappings between IP 
addresses and hostnames.

So you'd use a dhcpd.conf file like this:

subnet 192.168.2.0 netmask 255.255.255.0 {
         range 192.168.2.20 192.168.2.31;
         option domain-name-servers 192.168.2.11, 192.168.2.1;
         option subnet-mask 255.255.255.0;
         option broadcast-address 192.168.2.255;
         option domain-name "intra.city-fan.org";
         option routers 192.168.2.11;
}

group {
         host badby            { hardware ethernet 00:80:c8:64:9f:51;
                                 fixed-address 192.168.2.1;}
         host laurel           { hardware ethernet 00:80:c8:64:5b:c2;
                                 fixed-address 192.168.2.2;}
         host station          { hardware ethernet 00:05:5d:03:3b:fd;
                                 fixed-address 192.168.2.3;}
         host xylaptop         { hardware ethernet 00:00:86:4e:6f:e6;
                                 fixed-address 192.168.2.6;}
         host goalkeeper       { hardware ethernet 00:e0:4c:01:6d:a8;
                                 fixed-address 192.168.2.11;}
}


Note that the group of hosts with fixed IP addresses are assigned IP 
addresses outside the range specified in the "range" clause that the 
server uses for dynamic IP allocation.

You then have hosts files entries for the hosts with fixed IP addresses.

Paul.