Re: [CentOS] Finding DHCP IP of guest system

[Jay Leafey]

I had the same issue on my local network (DHCP server could not update DNS) so I cobbled up a shell script that runs periodically to update DNS manually. It does a ping-sweep using "nmap -sP 192.168.1.0/24" and parses the output. The output (obfuscated and abbreviated) looks like this:

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2010-07-16 20:53 CDT
Host 192.168.1.1 appears to be up.
MAC Address: **:**:**:**:**:** (Unknown)
Host 192.168.1.2 appears to be up.
MAC Address: **:**:**:**:**:** (Compaq Computer)
Host workstation.local (192.168.1.5) appears to be up.
MAC Address: **:**:**:**:**:** (Hewlett Packard)
Host printer.local (192.168.1.9) appears to be up.

Admittedly, it's a heck of a kludge.
--
Jay Leafey - jay.lea...@mindless.com
Memphis, TN

In my case, I added the MAC address/DNS name pairs in /etc/ethers and use that to drive the process. I've even got a few VMware hosts with bridged interfaces, they work the same as the physical machines.

smime.p7s
Description: S/MIME Cryptographic Signature

_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos