[Samba] Samba behind NAT

Eero Volotinen eero.volotinen at iki.fi
Thu Jan 21 15:07:30 MST 2010

2010/1/21 Igor <sprog at online.ru>:
> Hello All,
>  I have a strange problem regarding samba 3.0.37
>  I have samba server installed in the local network behind NAT, the
>  router iptables are configured as follows:
>  #samba
>  $IPT -t nat -A PREROUTING -i $INET_IFACE -p udp  -d $INET_IP -m multiport --dports 137,138 -j DNAT --to-destination $FILESERV
>  $IPT -t nat -A PREROUTING -i $INET_IFACE -p tcp  -d $INET_IP -m multiport --dports 139,145 -j DNAT --to-destination $FILESERV
>  #samba
>  $IPT -A FORWARD -p udp -m state --state NEW -i $INET_IFACE -d $FILESERV -m multiport --dports 137,138 -j ACCEPT
>  $IPT -A FORWARD -p tcp -m state --state NEW -i $INET_IFACE -d $FILESERV -m multiport --dports 139,145 -j ACCEPT
>  The samba server is working fine and both smbd and nmbd are started. I
>  have no problems accessing samba shares from local network using \\IP or
>  But when I try to access samba from outside of my network I can only
>  use \\IP, any attempt to use \\HOSTNAME results in "Windows couldn't
>  find HOSTNAME..." message, though HOSTNAME on windows machine is resolved
>  correctly.
>  I thought it might be related to "interfaces" option, so I added
>  router address into it but still cannot access samba by HOSTNAME from
>  outside of the network. I all so sure that the problem doesn't relate to
>  one particular windows setup since I can reproduce the problem on all
>  windows machines outside local network.
>  From samba log files it looks like there is no connection comes when
>  \\HOSTNAME is used on windows computers.
>  I would appreciate if someone could shed a light upon the problem.
>  Thanks in advance.

try \\fully.qualified.dns.name.of.samba.server


More information about the samba mailing list