No Name Available / No Reverse DNS Entry in System Log

Question

On our network, we have two Macs running different versions of OSX Server software. Our "main" server is a G5 dual 2GHz (2.5 Gb RAM) running Leopard Server 10.5.6, and it runs most of our major services such as Open Directory (it’s designated an OD Master), Mail, Web, FTP and DNS. Our "secondary" server is an XServe dual 2.3GHz (G5) (2 Gb RAM) running Tiger Server 10.4.11. It only runs the AFP service and exists solely as our company’s fileserver. Both of its ethernet ports are connected to our company’s 10/100 switch, and the ports are configured as follows: Built-in Ethernet 2 (BSD Device Name en1) IP addr. 10.1.10.154; Built-in Ethernet 1 (BSD Device Name en0) IP addr. 10.1.10.152. In the Network control panel’s Network Port Configurations, Built-in Ethernet 2 (IP address 10.1.154) is moved to the top of the configuration window and as a result, Network Status indicates that that XServe "is connected to the Internet via Built-in Ethernet 2."
That said, I see the following every 30 minutes in the System log:
Apr 20 11:01:51 NAGXServe2 servermgrd: servermgr_dns: no name available via DNS for 10.1.10.154
Apr 20 11:01:51 NAGXServe2 servermgrd: servermgr_dns: no reverse DNS entry for server, various services may not function properly
This doesn’t cause any apparent problems in daily operation but if it’s something I could fix myself, I’d be willing to try. In the TCP/IP configuration for both ports, the DNS Server entry points to our "main" G5 server (which has a static IP address) and the Search Domain entry is that "main" G5 server’s domain name.
In the DNS setup on the "main" G5 server, its domain name is entered in the "Primary Zone" field and its static IP address is entered in the Reverse Zone field; Whois lookups work successfully both forward and backward. But there is no mention of our "secondary" server anywhere in the "main" G5 server’s DNS setup.
Thanks for any help!

Answer 1

I am going to assume that the IP addresses you have given are REAL.
You have to add an entry for NAGXServe2 in the DNS server's (NAGXServe1?) configs.
First, what you need to enter are hostnames. The zone/domainname (example.com) should resolve to one representative server (your main server) for www service's sake, but otherwise, even your main server should have its own hostname (hostname.example.com).
Let's say you already have an entry for your domain, example.com. This zone should already have one (or even two) A record, nagxserve1.example.com (and maybe example.com, without any hostname). You need to add another A record for nagxserve2.example.com with the IP address 10.1.10.154.
You do this buy selecting "Computer (A) record" from the "Add record" dropdown button. A new A record called "newMachine" should appear under the zone record. If you can't see it, try clicking on the little triangle next to the zone/domain name.