Sendmail gethostbyaddr failure

[MTSU_SAN]

I just added a new lan dedicated to it's own network, and sendmail 8.11.1 is generating
Aug 1 09:46:22 frank sendmail[29941]: gethostbyaddr(192.1.1.2) failed: 1
errors. I would like to know how to reconfigure it to stop paying attention to this lan.

[Stefan Farrelly]

Add an entry to your /etc/hosts files for 192.1.1.2

and ensure your /etc/nsswitch.conf (DNS lookup) file is configured to check hosts also;

hosts: dns [NOTFOUND=continue] files

Then when you do; nslookup 192.1.1.2
it will resolve so gethostbyaddr will not produce an error.

[Sajid_1]

This link will help you to solve the issue:
http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=500000000092459

[John Dvorchak]

I don't know if you can. But you can make and entry in /etc/hosts resolving that address and the errors will quit. Of course you will have to make sure that you host looks in /etc/hosts via the /etc/nsswitch.conf file if present.

[Christopher McCray_1]

Hello,

I'm assuming you are using dns and the new lan cards are entered in /etc/hosts.

Make sure your /etc/nsswitch.conf looks like this:

hosts: dns [NOTFOUND=continue UNAVAIL=continue TRYAGAIN=continue] files

What I believe is happening is that you have return instead of continue, which means that if the ip isn't found, it bombs. Having continue lets it go on to files if not found in dns.

Hope this helps

Chris

[Hai Nguyen_1]

Jerry,

If you are using /etc/hosts for host name lookup, add a fake_hostname associated with this IP.

Is it true that it takes 2,3 minutes each time you restart sendmail manually currently?

Hai

[Bill McNAMARA_1]

try adding
192.1.1.2 frankie frankie.

into /etc/hosts
just the dot will do..

Later,
Bill

[MTSU_SAN]

Thanks everyone. When I did a search on forums, Manuals and documents for "sendmail + gethostbyaddr" why didn't the darn thing find the document referenced?!