Static IP, DHCP, and Me...
C. Ed Felt
ed at thefelts.net
Thu Feb 3 08:44:03 MST 2005
Some ISPs use the "hostname" as the identifier for security as well as
the mac address. If you remember what your old hostname was then use
to change your hostname to the one you used before.
Just "hostname" bye itself tells you the current hostname.
"hostname <new hostname>" changes your hostname.
If that doesn't work, time to sit on hold with tech support :-( .
Bryan Sant wrote:
>I have a static IP from my ISP. The IP must be acquired via DHCP or I
>can't even ping the default gateway. The firewall/gateway and DHCP
>server must be in kahoots.
>I had a Gentoo server that was getting the static IP with dhcpcd. I
>formatted that box and put CentOS 3.4 on that server. Now when I try
>to get my IP via DHCP I get a temporary IP rather than my assigned IP.
> Obviously the MAC address on my NIC hasn't changed. Why wouldn't the
>DHCP server identify my MAC and give me my static IP? I've heard that
>some DHCP clients (Windows?) use a "client ID" rather than the MAC
>address to identify themselves to the DHCP server. I'm thinking that
>this is what dhcpcd was doing when I was running Gentoo. I'm using
>ISC's dhclient with CentOS now.
>Is my hunch correct? Do I need to configure my DHCP client to send a
>client ID instead of my MAC (how do I do that with dhclient?). Has
>anyone else seen this problem?
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