Hi Lonnie

OK, so that's not the explanation of why my RDP session would not connect.
Basic networking question follows:

This Astlinux box is not the gateway for our Windows boxes. Does this mean
that, even if I set a port-forward up right on the Astlinux box (which I
think I did), there is no way to get the Windows box to send it's reply via
the Astlinux box, rather than via the normal gateway (which in this instance
was down, which is the problem I am trying to solve)?

Thanks for all the help

Tom


-----Original Message-----
From: Lonnie Abelbeck [mailto:[email protected]] 
Sent: 10 December 2012 15:47
To: AstLinux Users Mailing List
Cc: Tom Chadwin
Subject: Re: [Astlinux-users] NAT rule

Hi Tom,

The Firewall tab's "NAT EXT:" entry specifies which external IP the rule
applies to, by default it is 0/0 which is any external IP.  You probably
only have one external IP address.

So, something like this would work for RDP
--
NAT EXT-LAN Protocol: TCP  Src: 0/0  Port: 3389  Dst: 192.168.100.10  Port:
3389 NAT EXT: 0/0

{ Restart Firewall } - _x_ Confirm
--

For the advanced, special case where your external interface has more than
one static IP address defined via the Advanced variable EXTIP_ALIAS
(user.conf):

EXTIP_ALIAS="1.2.3.11"

In this case, in addition to the static external IP address defined in the
Network tab (assume 1.2.3.10), the 1.2.3.11 address will also be 'aliased'
to the same external interface.  For this case when NAT'ing, you can use:
--
NAT EXT: 1.2.3.10
-- or --
NAT EXT: 1.2.3.11
-- or --
NAT EXT: 0/0
--
to specify if the NAT rule should apply to only 1.2.3.10, or only 1.2.3.11
or both 0/0.

Lonnie


On Dec 10, 2012, at 8:04 AM, Tom Chadwin wrote:

> Hello all
> 
> Just lost main connection to a remote site, but the Astlinux box (also 
> on the LAN) on its own line is up and reachable. I'm therefore trying 
> to set up a port forward on the Astlinux box to allow me to RDP from 
> here to a Windows box on the LAN.
> 
> Have added a "NAT EXT>LAN" rule. This brings up another field labelled 
> "NAT EXT", with the default value of 0/0. What is this? Should I enter 
> something here? I cannot establish the RDP session yet, so something isn't
working.
> 
> Thanks
> 
> Tom



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