Re: [Networker] Strange reverse DNS error
2006-03-21 07:07:40
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.
greetings,
Dennis
--
*******************************************************************
D. Voetelink
UNIX Systems Administrator
Energy research Centre of the Netherlands
Facilities Department - Automation Services
Petten, Netherlands
e-mail : voetelink AT ecn DOT nl
phone : (+31) 224 564738
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