IP Address Problems

Derek Broughton news at pointerstop.ca
Tue Jan 10 14:58:02 UTC 2006

Roger Haxton wrote:

> On Monday 09 January 2006 05:06, dan wrote:
>> According to my ISP, my IP address has been changing every so often,
>> for the last few weeks (possibly longer- they've been deleting the
>> messages that come up...).
>> It is supposedly meant to remain the same (using DHCP), but for some
>> reason it has started to alter, and I must admit that looking at the
>> IP address now, it does look different.
>> However I dont know what I could have done / what has happened to
>> cause this. They suggested spyware or a virus, but I am inclined to
>> think otherwise.
> I've been seeing similar problems with my laptop connected to my LAN.  My
> DHCP server is set for a 30 day lease time, but, every day I appear to get
> a
> different IP.  It is almost like the Ubuntu networking doesn't honor the
> lease time set by the DHCP server.  At home, my laptop gets the same IP
> address everytime because I have a reservation set for both my LAN and
> interfaces.  I used to have a reservation set here at the office, but I
> didn't need it any longer so I removed it from my DHCP server.  I just
> looked at my DHCP server and it is not registering any kind of name in
> DHCP when it
> receives an IP address.  Very strange.

The "name" business is simple to fix.  Add:
        send host-name NAME;
to your dhclient.conf

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