?
Solved

Ping Windows NetBIOS names from CentOS

Posted on 2014-04-09
7
Medium Priority
?
3,432 Views
Last Modified: 2014-05-01
I am unable to resolve windows NetBIOS names from inside CentOS.  I've tried the following:

Adding "wins" entry to "hosts:" in nsswitch.conf ("files wins dns")
Changing the order of "files", "wins", and "dns" in nsswitch.conf
Restarting networking "service network restart"
Adding "search WORKGROUP" to resolv.conf (replacing WORKGROUP with my particular workgroup)
Installing samba-common
Restarting the machine

I'm kinda out of options, and I'm not sure where to go from here.  From what I've read, adding wins to nsswitch.conf should solve it, but that doesn't work for me.

I'm able to ping the computers via IP address, and I can resolve the NetBIOS names on Windows machines.  I don't think it's a firewall issues, because when I stop iptables, the issue persists.  It could maybe be an SELinux issue, but I don't really know where to start troubleshooting that.

Help me, EE, you're my only hope!
0
Comment
Question by:nick2253
7 Comments
 
LVL 84

Expert Comment

by:Dave Baldwin
ID: 39990074
As far as I know Samba is the only thing that even looks at NetBIOS on a Linux machine.  It is also the only thing that knows about 'workgroups'.
0
 
LVL 62

Expert Comment

by:gheist
ID: 39990245
WINS is not NetBIOS
You need more than samba-common to get netbios names. At least package containing nmbd is needed.
0
 
LVL 84

Expert Comment

by:Dave Baldwin
ID: 39990404
I think that 'ping' does a DNS lookup when you give it a host name.  There is no reason to think that the NetBIOS names are in DNS unless you did something to put them there.  On my Ubuntu systems, I had to add all of my Windows machines that have web servers to my 'hosts' file to connect to them by name.
0
Prepare for your VMware VCP6-DCV exam.

Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.

 
LVL 31

Accepted Solution

by:
serialband earned 1000 total points
ID: 39990725
There are some instructions on how to set samba up to resolve Wins.  Maybe the following links can help.  https://www.ibm.com/developerworks/library/l-lpic3-314-2/
http://forums.opensuse.org/showthread.php/454546-nmblookup-resolves-but-cannot-ping-netbios-names-or-ping-FQDN

Those eventually link to the Samba Docs which suggests that you must also edit smb.conf to configure SAMBA to point to the WINS server
Edit these lines in smb.conf
wins support = No
wins server = xxx.xxx.xxx.xxx


Scroll down to the WINS Lookup section in https://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/integrate-ms-networks.html#id2586120

You need nmbd to run nmblookup to look up names, but that's independent from ping. http://linuxcommand.org/man_pages/nmblookup1.html
0
 
LVL 62

Expert Comment

by:gheist
ID: 39990806
setting "wins" in nsswitch.conf implies querying nmbd (which can be configured with or without WINS server)
Name itself causes confusion, no wins server is needed to support pinging netbios names.

Why dont you enable DNS auto-registration in your DNS server and rise above archaic useless naming protocols?
0
 
LVL 13

Expert Comment

by:Sandy
ID: 39990860
Yes enable DNS auto-reg in your DNS server.

TY/SA
0
 
LVL 9

Author Closing Comment

by:nick2253
ID: 40035148
This didn't actually resolve my issue of getting "ping" to work with NetBIOS names (though it did allow me to get names through nmblookup), but I've since changed my DNS structure in my network, so it's no longer an issue.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Are you one of those front-line IT Service Desk staff fielding calls, replying to emails, all-the-while working to resolve end-user technological nightmares? I am! That's why I have put together this brief overview of tools and techniques I use in o…
Trying to figure out group policy inheritance and which settings apply where can be a chore.  Here's a very simple summary I've written which might help.  Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Connecting to an Amazon Linux EC2 Instance from Windows Using PuTTY.
Suggested Courses

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question