hostname doesn't stick

[Paul Vandenberg]

On 9/17/06, jdow <jdow at earthlink.net> wrote:
> From: "Mikkel L. Ellertson" <mikkel at infinity-ltd.com>
>
> > Tim wrote:
> >> On Sun, 2006-09-17 at 10:32 +0100, Anne Wilson wrote:
> >> Do you mean adding a line for the local host addresses to the hosts
> >> file?  If you have any service, including the X server, sendmail, etc.,
> >> that tries to start up using the machine's hostname, it has to be able
> >> to know what IP and name are associated with each other.
> >>
> > This is especially true if you are not connected to a network. And
> > it has to be an IP address that the machine responds to. So you can
> > not give it an IP address like 127.0.0.2 unless you create a second
> > interface like lo:1 that responds to that IP address.
>
> [root at thing ~]# ssh 127.1.1.1
> root at 127.1.1.1's password:
> Last login: Sun Sep 17 14:43:14 2006 from 127.1.1.1
> [root at thing ~]#
>
> No further comment needed. But I will anyway. The hosts file is for
> name lookup. It does not assign addresses or enable addresses.
>
> > One of problems is home networks connected to a firewall/router
> > using DHCP. A lot of them handle DHCP, and act as a caching name
> > server for the local network, but they do not DHCP lease to hostname
> > mapping. So you can not ask the name server for the IP address for
> > your hostname. Now, if you can configure the DHCP server so that you
> > always get the same hostname, you can put that entry in your
> > /etc/hosts file and be all set.
> >
> > A better solution might be to add an option to the DHCP client so
> > that it can add/remove a /etc/hosts entry for your hostname that
> > matches the IP address assigned to the interface. You would need to
> > be able to control it on an individual interface option. (I have not
> > looked into this - do any of the DHCP clients support this?)
>
> I'm not sure about dhcp clients; but I do know that the Microsoft
> DHCP defaults attempt to register the changes with the DNS servers.
> I have that blocked for security reasons. And I have fixed address
> DHCP assignments instead.
>
> {^_^}
>
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How about just using Fedora's network tool. I changed the hostname
under the DNS tab.

Paul