CIFS Mount Error

chief_officer · 08-05-2013, 07:23 AM

Hello,

I'm trying to mount a share folder on an EMC Data Domain to an Ubuntu 8.04 Server. The environment is as follows:

Ubuntu Server: Located on DMZ -say- IP 8.8.8.8
EMC Data Domain: Located on LAN - say - IP 10.1.1.10
Firewall on DMZ: Open any-any from the Ubuntu Server to the Data Domain
Firewall on Ubuntu Server: UFW service is stopped.
nfs-common is up to date.

When I try to run

Code:

mount.cifs //10.1.1.10/share/ /backupmount -o user=username,pass=<secret>

I receive the following error

Code:

CIFS VFS: Error connecting to IPv4 socket. Aborting operation

Code:

CIFS VFS: cifs_mount failed w/return code = -512

I went through many troubleshooting steps by enabling logging on the corporate firewall and the UFS. However, checking all the logs, I see no connection requests when I run the mount command. But if I start a ping to 10.1.1.10, I see blocked ICMP requests. This means that the mount command is somehow not invoked, or somehow does not "leave" the server. Otherwise it should try to make a connection attempt, which in turn would be logged in the UFW log or in the corporate log as a connection attempt.

Any ideas on what could be hapening?

Thanks

PS: I have Googled for 3 days straight, which is more than enough, so please don't ask me to do that.

Ser Olmy · 08-05-2013, 07:35 AM

Quote:

Originally Posted by chief_officer

When I try to run

Code:

mount.cifs //10.1.1.10/share/ /backupmount -o user=username,pass=<secret>

I receive the following error

Code:

CIFS VFS: Error connecting to IPv4 socket. Aborting operation

Code:

CIFS VFS: cifs_mount failed w/return code = -512

Try using the server name and specify the IP address with the "ip" parameter if name resolution is an issue:

Code:

mount -t cifs -o ip=10.1.1.10,user=username,password=<secret> //server_name/share /backupmount

Using an IP address instead of a server name breaks Kerberos and will cause the CIFS client to fall back to NTLM, which may not be what you want.

chief_officer · 08-06-2013, 09:24 AM

Hello,

Thank you very much for your reply. I have followed you, but the error is now

Code:

CIFS VFS: Error connecting to IPv4 socket. Aborting operation

Code:

CIFS VFS: cifs_mount failed w/return code = -110

It seems to me that the mount command is somehow not initiating at the OS level at the first place, even before attempting network connection.

What do you think?

Regards

Ser Olmy · 08-06-2013, 01:34 PM

The error message indicates an unreachable socket. That's a problem at a lower level than CIFS.

Is the 10.1.1.10 address reachable? What do you mean when you say you see "blocked ICMP requests" when you try pinging it?

You should be able to connect to TCP port 445. If telnet 10.1.1.10 445 doesn't work, your problem is at the transport layer or below.

louis.brooks · 08-07-2013, 02:55 AM

This may be a stupid question but can you mount the share from another client?

Thaler · 08-07-2013, 07:46 AM

This could be nothing but on my system it is username=username. How about that instead of user=username?