[Samba] Firewall piercing - The Specified network name is no longer available.

[Ilia Chipitsine]

you can setup PPTP/VPN server and this eliminates need of using NAT.

> Hi all.
>
> I'm trying to set up one of my Unix machines at home so I can access my
> stuff there via SMB from the Internet at large (read: from Windows-using
> clients').
>
> I'm behind two NATting devices-- the lame-p Prestige DSL modem provided by
> Sprint DSL (a.k.a. Earthlink?) and a more typical home DSL/cable gateway
> device.
>
> I've poked holes in BOTH of these devices on ports 137, 138, 139 AND 445.
> Only port 139 actually responds to TCP connections (well, only port 139
> accepts a telnet, even from localhost.
>
> See:
>
> --------------------------------------------------------------------------
> -bash-2.05b# telnet localhost 137
> Trying ::1...
> telnet: connect to address ::1: Connection refused
> Trying 127.0.0.1...
> telnet: connect to address 127.0.0.1: Connection refused
> -bash-2.05b# telnet localhost 138
> Trying ::1...
> telnet: connect to address ::1: Connection refused
> Trying 127.0.0.1...
> telnet: connect to address 127.0.0.1: Connection refused
> -bash-2.05b# telnet localhost 139
> Trying ::1...
> telnet: connect to address ::1: Connection refused
> Trying 127.0.0.1...
> Connected to localhost.
> Escape character is '^]'.
> ^]
> telnet> close
> Connection closed.
> -bash-2.05b# telnet localhost 445
> Trying ::1...
> telnet: connect to address ::1: Connection refused
> Trying 127.0.0.1...
> telnet: connect to address 127.0.0.1: Connection refused
> --------------------------------------------------------------------------
>
> It should go without saying that this machine's Samba shares work
> PERFECTLY WELL within the LAN. ;)
>
> Now, from the outside, I can telnet to port 139 on the machine just fine,
> through both NAT devices. However, when I go Start, Run,
> \\x.y.z.a\sharename (where "x.y.z.a" is the IP address-- not the FQDN-- of
> the machine), Windows vomits up this unhelpful message:
>
>
> --------------------------------------------------
> \\x.y.z.a\sharename
> The specified network name is no longer available.
> --------------------------------------------------
>
> See:
>
> http://jlb.twu.net/tmp/unhelpful.png
>
> Any ideas? The client machine runs Windows 2000 Pro.
>
> --
> J. L. Blank, Systems Administrator, twu.net
> -- 
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