[Samba] mount cifs

[lists]

Hi,

I updated our servers to 4.2.11, and I have a problem, but I'm not sure 
if the problem is related to the update.

I am trying to use mount.cifs:

> mount -t cifs -o username=username,password=super_secret,domain=WRKGRP //ip.of.our.samba/share /mnt
> mount error(112): Host is down
> Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

Host is up, i can use smbclient to connect, and also coming from windows 
everything works.

I also tried adding sec=ntlmv2i, makes no difference.

mount.cifs version: 6.4, debian jessie

Could this perhaps have something to do with the new defaults getting in 
the way? Host down seems such a strange message...

The only interesting lines on the samba server (log level 5) is:

> [2016/04/18 21:39:44.373051,  5] ../source3/lib/messages.c:384(messaging_register)
>   Registering messaging pointer for type 1 - private_data=(nil)
> [2016/04/18 21:39:44.496187,  5] ../source3/lib/util_sock.c:132(read_fd_with_timeout)
>   read_fd_with_timeout: blocking read. EOF from client.
> [2016/04/18 21:39:44.496225,  5] ../source3/smbd/process.c:553(receive_smb_talloc)
>   receive_smb_raw_talloc failed for client ipv4:192.87.143.26:60884 read error = NT_STATUS_END_OF_FILE.
> [2016/04/18 21:39:44.496318,  4] ../source3/smbd/sec_ctx.c:316(set_sec_ctx)
>   setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
> [2016/04/18 21:39:44.496342,  5] ../libcli/security/security_token.c:53(security_token_debug)
>   Security token: (NULL)

EOF from client,  NT_STATUS_END_OF_FILE?

Ideas anyone?