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тАО03-14-2007 09:52 AM
тАО03-14-2007 09:52 AM
syslog: gethostbyaddr: fqdn != x.x.x.x
I get a fair number of messages like this in syslog.log:
Mar 14 13:07:34 syslog: gethostbyaddr: host.mydomain.com. != x.x.x.x
where host is any of several different hosts in our intranet and x.x.x.x is that host's ip number. From the command line I can do nslookup on the name, or the number, and both return the same valid information as what is in the syslog message.
Is this message in syslog.log indicating there is a problem somewhere? or is it just "informational"? I haven't been able to figure out what activity results in these messages.
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тАО03-14-2007 10:20 AM - last edited on тАО03-23-2017 03:11 PM by Warren_Admin
тАО03-14-2007 10:20 AM - last edited on тАО03-23-2017 03:11 PM by Warren_Admin
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
Possible errors in one of your DNS servers. See this previous thread -
[Broken link removed on 03-23-2017 by Admin]
regards,
ivan
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тАО03-14-2007 10:35 AM
тАО03-14-2007 10:35 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
In my case, I think syslog message is saying gethostbyaddr returned the wrong address, but in fact the address in the message is the correct address for the host.
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тАО03-15-2007 03:30 AM
тАО03-15-2007 03:30 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
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тАО03-15-2007 06:36 AM
тАО03-15-2007 06:36 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
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тАО03-15-2007 06:38 AM
тАО03-15-2007 06:38 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
DNS lookups are failing.
Possible causes:
1) Microsoft DNS servers.
2) problems with /etc/resolv.conf
3) Problem with how the application is forming its request (bad c code and such).
4) Routers and firewalls attempting to block port 53 udp or tcp.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО03-15-2007 06:50 AM
тАО03-15-2007 06:50 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
Yes, cause is Windows DHCP, Windows Active Directory, Windows DNS servers, and/or our configuration of such. I am not Windows administrator. Once I discovered that DNS lookup of 2 different ip numbers returned same hostname, Windows admin admitted yes, this is a known problem...
I suppose I should have been more explicit in my previous post that I understood the problem (well enough to get it out of my court into theirs) and/or closed the thread.
Thanks for the help.
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тАО07-29-2015 02:29 AM
тАО07-29-2015 02:29 AM
Re: syslog: gethostbyaddr: fqdn != x.x.x.x
Hai to All,
I have also got same errors in syslog with os version HP unix 11.23.
then i found there was duplicate entries are there at that time reverse name resolution(ip to name).
I have corrected in my dns server resolved my issue.
Thanks to all.
Mahesh Dadi