SAMBA connect laptop -> desktop works, desktop -> laptop won't work

rylan76 · 10-10-2011, 08:08 AM

Hi guys

I've got two machines (one a laptop, one a desktop) running the same SAMBA version, on FC11 (old I know, but its a home net behind a router / firewall)

The laptop is 192.168.0.24
The desktop is 192.168.0.22

From the laptop, I can smbclient -L 192.168.0.22 (to the desktop) and see the shares it presents.

Form the desktop, I can smbclient -L 192.168.0.24 (to the laptop) and see the shares it presents.

However, I can ONLY connect in ONE direction...

smbd and nmbd is running on both machines.

I can only do laptop (192.168.0.24) to desktop (192.168.0.22):

Code:

On laptop:

mount -t cifs "//192.168.0.22/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775

doing this from desktop (192.168.0.22) to laptop (192.168.0.24):

Code:

On desktop:

mount -t cifs "//192.168.0.24/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775

always results in

Code:

[root@stefanhost ~]# mount -t cifs "//192.168.0.24/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775
retrying with upper case share name
mount error(6): No such device or address
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
[root@stefanhost ~]#

This is irrespective of whether the laptop is currently successfully connected to the desktop or not.

Here's the laptop's /etc/samba/smb.conf:

Code:

[global]

netbios name = stefan_laptop
workgroup = PGSI
security = share
log file = /var/log/samba.log 
log level =  1
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=16384 SO_SNDBUF=16384 
wins support = yes 
domain logons = no
logon drive = f: 
logon home = \\stefan\%U
os level = 99 
preferred master = yes
local master = yes
hosts allow = 192.168.0.22
encrypt passwords = yes
browseable = yes
lanman auth = yes 
lm announce = yes 
client lanman auth = yes
client plaintext auth = yes

[shared]
path = /mnt/win/shared
guest ok = yes 
writeable = yes 
create mode = 0666 
directory mode = 0777
browseable = yes
public = yes

Here's the desktop's smb.conf:

Code:

[global]

netbios name = stefan_desktop
workgroup = PGSI
security = share
log file = /var/log/samba.log 
log level =  1
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=16384 SO_SNDBUF=16384 
wins support = yes 
domain logons = no
logon drive = f: 
logon home = \\stefan\%U
os level = 99 
preferred master = yes
local master = yes
hosts allow = 192.168.0.24
encrypt passwords = yes
browseable = yes
lanman auth = yes 
lm announce = yes 
client lanman auth = yes
client plaintext auth = yes

[shared]
path = /mnt/win/shared
guest ok = yes 
writeable = yes 
create mode = 0666 
directory mode = 0777
browseable = yes
public = yes

Yes, both have a mounted and working /mnt/win/shared mountpoint in the Linux filing system.

IPtables has been disabled on BOTH machines. SELinux is off.

Any idea why I can only connect in ONE direction from 192.168.0.24 to 192.168.0.22, but never from 192.168.24 to 192.168.0.22?

I can see shares in both directions with smbclient -L:

From desktop (192.168.0.22) viewing laptop 192.168.0.24

Code:

[root@stefanhost ~]# smbclient -L 192.168.0.24
Enter stefan's password:
Domain=[PGSI] OS=[Unix] Server=[Samba 3.3.2-0.33.fc11]

        Sharename       Type      Comment
        ---------       ----      -------
        shared          Disk
        IPC$            IPC       IPC Service (Samba 3.3.2-0.33.fc11)
Domain=[PGSI] OS=[Unix] Server=[Samba 3.3.2-0.33.fc11]

        Server               Comment
        ---------            -------
        STEFAN_DESKTOP       Samba 3.3.2-0.33.fc11
        STEFAN_LAPTOP        Samba 3.3.2-0.33.fc11

        Workgroup            Master
        ---------            -------
        ACCOUNTING           ESNA1
        PGSI                 STEFAN_LAPTOP
        WORKGROUP            KHAPTA-WS01
[root@stefanhost ~]#

From laptop (192.168.0.24) viewing desktop 192.168.0.22

Code:

[root@stefanhost ~]# smbclient -L 192.168.0.22
Enter stefan's password:
Domain=[PGSI] OS=[Unix] Server=[Samba 3.3.2-0.33.fc11]

        Sharename       Type      Comment
        ---------       ----      -------
        shared          Disk
        IPC$            IPC       IPC Service (Samba 3.3.2-0.33.fc11)
Domain=[PGSI] OS=[Unix] Server=[Samba 3.3.2-0.33.fc11]

        Server               Comment
        ---------            -------
        STEFAN_DESKTOP       Samba 3.3.2-0.33.fc11
        STEFAN_LAPTOP        Samba 3.3.2-0.33.fc11

        Workgroup            Master
        ---------            -------
        ACCOUNTING           ESNA1
        PGSI                 STEFAN_LAPTOP
        WORKGROUP            KHAPTA-WS01
[root@stefanhost ~]#

Whenever the desktop tries to connect it is told that no such share exists on the laptop - even though smbclient -L to the laptop DOES show the share as available:

Code:

[root@stefanhost ~]# mount -t cifs "//192.168.0.24/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775
retrying with upper case share name
mount error(6): No such device or address
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
[root@stefanhost ~]#

Anybody got any idea where I can start looking? Why can I connect in only one direction?

Thanks!

camorri · 10-10-2011, 08:31 AM

Just a thought. Have you set up /etc/hosts file on both systems? I have had lots of issues with samba, until I set one up, and copied it to all the clients.

It looks like it never tries to find the laptop.

rylan76 · 10-11-2011, 08:38 AM

Hi!

Thanks for the response. I did this:

On the laptop's /etc/hosts

Code:

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.22 stefan_desktop

On the desktop's /etc/hosts

Code:

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.24 stefan_laptop

However, no change - the laptop can still connect to the desktop, but just as before, trying to connect the desktop to the laptop gives

On desktop:

Code:

[root@stefanhost ~]# mount -t cifs "//192.168.0.24/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775
mount error(113): No route to host
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
[root@stefanhost ~]# ping 192.168.0.24
[root@stefanhost ~]# ping 192.168.0.24
PING 192.168.0.24 (192.168.0.24) 56(84) bytes of data.
64 bytes from 192.168.0.24: icmp_seq=1 ttl=64 time=0.256 ms
64 bytes from 192.168.0.24: icmp_seq=2 ttl=64 time=0.250 ms
64 bytes from 192.168.0.24: icmp_seq=3 ttl=64 time=0.256 ms
^C
--- 192.168.0.24 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2239ms
rtt min/avg/max/mdev = 0.250/0.254/0.256/0.003 ms
[root@stefanhost ~]#

Also, I double checked that smbd and nmbd (started via smbd -D and nmbd -D) are running on the laptop. I've also reconfirmed that SELinux and iptables are disabled - still can only connect in one direction...

Thanks for the suggestion anyway!

Regards

camorri · 10-11-2011, 09:02 AM

This appears to be a routing issue, more than a samba problem.

Do you have a router in the network?

Have you looked at the default routes?

Do you have a /etc/hosts.allow and /etc/hosts.deny files? If yes, try renaming the deny file, and give it a try. Just some more thoughts.

rylan76 · 10-12-2011, 05:51 AM

Quote:

Originally Posted by camorri

This appears to be a routing issue, more than a samba problem.

Do you have a router in the network?

Have you looked at the default routes?

Do you have a /etc/hosts.allow and /etc/hosts.deny files? If yes, try renaming the deny file, and give it a try. Just some more thoughts.

Hi Cliff

Thanks for the reply.

Yes, there is the normal home-network scenario - router connected to ISP in non-bridged mode.

Here's what I see for default routes:

Desktop:

Code:

[root@stefanhost ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     1      0        0 eth0
192.168.122.0   *               255.255.255.0   U     0      0        0 virbr0
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
[root@stefanhost ~]#

Laptop:

Code:

[root@stefanlaptop ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.0.0     *               255.255.255.0   U     1      0        0 eth0
default         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
[root@stefanlaptop ~]#

Strange - the desktop has a "virbir0" network interface listed, but I very definitely only have one NIC in the machine. Could this have something to do with my problem?

I do have /etc/hosts.allow and /etc/hosts.deny files, I put each target machine's IP in the allow files on both, and renamed the .deny files to /etc/hosts/deny.bak.

No luck. Trying to connect form the desktop to the laptop gives

Code:

[root@stefanhost ~]# mount -t cifs "//192.168.0.20/shared" /mnt/remote  -o username=guest,password="",uid=stefan,dirmode=0775,filemode=0775
mount error(113): No route to host
Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)
[root@stefanhost ~]#

while the laptop still happily connects to the desktop.

So you suspect it might be a routing problem imposed by the fact that there is a router on the network?

Thank you for your help!

Kind regards,

camorri · 10-12-2011, 08:28 AM

Quote:

Strange - the desktop has a "virbir0" network interface listed, but I very definitely only have one NIC in the machine. Could this have something to do with my problem?

This interface shows up when you are using 'libvirtd' daemon. ( Developed by Red Hat for virtual machines ). I don't know if it could cause a problem or not. You could try deactivating the interface, and try again.

The other thing I would like to see you try, now that you have /etc/hosts files on both systems, is try the mount using the host name, not the IP address. It shouldn't make a difference, however, this is a strange problem. No problem pinging the laptop, but can't do a cifs mount with "No route to host".

One last thought, you could define a static route to the laptop and see if the mount works. Best of luck.

rylan76 · 10-14-2011, 09:35 AM

Quote:

Originally Posted by camorri

This interface shows up when you are using 'libvirtd' daemon. ( Developed by Red Hat for virtual machines ). I don't know if it could cause a problem or not. You could try deactivating the interface, and try again.

Ok, thanks.

Quote:

The other thing I would like to see you try, now that you have /etc/hosts files on both systems, is try the mount using the host name, not the IP address. It shouldn't make a difference, however, this is a strange problem. No problem pinging the laptop, but can't do a cifs mount with "No route to host".

Ok, I'll give it a try once I'm in that office again.

Quote:

One last thought, you could define a static route to the laptop and see if the mount works. Best of luck.

What is the syntax / command I'd use to define a static route of this kind?

Thanks for your help & suggestions!

Kind regards,

camorri · 10-14-2011, 12:13 PM

Quote:

What is the syntax / command I'd use to define a static route of this kind?

'ip route add' is the command. Here is a link for a How to...

-->What is the syntax / command I'd use to define a static route of this kind?

The is information in the man page for 'route'.