> Lots of systems get really upset if you try to assign multiple hostnames > to > the same tcpip stack.
That's what CNAME records in the DNS are for. I create a DNS forward and reverse for each interface (canonical name-interface, eg foo-eth0, foo-hsi0, etc.). The "hostname" that I configure as /etc/hostname is a CNAME pointing to the appropriate interface, which makes it nicely portable. Most of the complaining about multiple entries pointing to an address is caused by the forward entry not matching the reverse entry. CNAMEs force another DNS recursion to get the info of the actual interface, which has forward and reverse matching, and everyone's happy. If it's mail, you need MX and SPF records as well. If I want a pointer to a host from the same zone or another zone, I can use a CNAME to the FQDN of the interface I want to use. It's a little more work, but it's really flexible, and helps a lot when you start doing VIPA and other tricks. Example: Linux guest vm1foo01.guest.com has two interfaces, one external Ethernet, one internal hipersocket. In my guest.com DNS zone I have: vm1foo01-eth0 IN A 123.45.67.89 vm1foo01-hsi0 IN A 10.11.12.13 vm1foo01 IN CNAME vm1foo01-eth0 In the reverse zone files, we create: 123.45.67.zone: 89 IN PTR vm1foo01-eth0.guest.com. 10.11.12.zone: 13 IN PTR vm1foo01-his0.guest.com. Users in guest.com refer to vmfoo01, and they get the vm1foo01-eth0 address. Any host that actually checks forward and reverse matches has to follow the CNAME pointer to the canonical entry, and those entries always match correctly. Another host might create a DNS entry for vm1foo01, but want to refer to the hipersocket interface only. They create: vm1foo01 IN CNAME vm1foo01-hsi0.guest.com and any reference they make to vm1foo01 goes to the hipersocket interface. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
