Hi Stan,
We have these "errors" in servers that are working as firewalls with NAT
support (i.e. they have an IP entry for every machine it must firewall). The
solution is easy: put an entry in the /etc/hosts of the saturn machine. In
this manner, the IP will be reverse lookup without problems.
See you.
> -----Original Message-----
> From: Legato NetWorker discussion
> [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Stan Horwitz
> Sent: Tuesday, March 21, 2006 12:53 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] Strange reverse DNS error
>
>
> 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?
>
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