On Mar 21, 2006, at 7:05 AM, Voetelink D. wrote:

Stan,

I am experiencing an odd situation with a Red Hat Linux server that is operated by a different department than the one I work in. The system administrator of that server is not very responsive to resolving issues backing up his server, so I thought I would try asking here about it. The error I am seeing in the savegroup completion reports is

* saturn:/ NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: / level=incr, 7 KB 00:00:03 6 files * saturn:/boot NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /boot level=incr, 0 KB 00:00:04 0 files * saturn:/home NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /home level=incr, 0 KB 00:00:07 0 files * saturn:/opt NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /opt level=incr, 0 KB 00:00:03 0 files * saturn:/tmp NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /tmp level=incr, 1 KB 00:00:06 2 files * saturn:/usr NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /usr level=incr, 0 KB 00:00:05 0 files * saturn:/usr/local NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /usr/local level=incr, 0 KB 00:00:04 0 files * saturn:/var NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /var level=incr, 81 MB 00:01:24 156 files * saturn:/var/log NetWorker: Diagnostic: Reverse DNS lookup failed for address 155.247.116.122 saturn: /var/log level=incr, 5507 KB 00:00:07 24 files bootz: index:saturn level=9, 142 KB 00:09:43 7 files

As far as I can tell, this 155.247.116.122 address does not exist. The person who manages that system insists that his server is configured correctly. I have tried warning him that he should at least try recovering a few files on each volume to make sure its working. No go, so far, with that. Both the NetWorker server (Solaris 9) and this Red Hat Linux client are running NetWorker 7.2.1. That 155.247.116.122 address does not respond to pings from our NetWorker server, nor does it show up when I query our local DNS. The saturn host name is looked up via DNS, it is not in the NetWorker server's /etc/hosts file. Reverse DNS works for Saturn. When reverse DNS is tested on Saturn against the network details for our NetWorker server, it also works fine. So, why are these errors appearing and what can I tell my reluctant colleague to do in order to resolve this problem?

This message appeared at one of our webservers which has multiple IP addresses, which weren't all reverse resolvable.

I think you will find the address if you login on the saturn system and run '/sbin/ifconfig -a'.

Possible solutions:
- remove the IP address from the system (if possible)
- Put the address in the DNS
- Put the address in /etc/hosts on the saturn system.

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