On Monday 05 March 2007 02:09:21 pm Al Sparks wrote: > I have set up a secondary IP address in the same network as my primary. > > So > eth0: 192.168.100.29 netmask 255.255.255.0 > eth0:0 192.168.100.45 netmask 255.255.255.0 > > And indeed when I invoke an apache instance that listens on the secondary > IP address/interface it works, and it also makes it outside the LAN since > the default gateway is defined in the routing tables for 192.168.100.0/24. > > But I'd like to be able to send out some sort of broadcast on the network > from that secondary interface so that the arp tables on various devices on > the network get updated. > > How would I, say, use nmap to do something like that? Is there a generic > way to force a particular program to use a secondary IP address instead of > the default primary? > > Obviously, something like BIND or Apache httpd has that hardcoded in so > that you can tell them to use secondaries via their configuration files. > > But how about those programs that don't? ping -I 192.168.100.45 <destination> or ping -I eth0:0 <destination> -I tells ping what interface to send the packet out -- Dennis Gilmore, RHCE _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos