[stunnel-users] Connecting stunnels

Thu Mar 31 16:26:02 CEST 2016

On Thu, 2016-03-31 09:39:49 -0400, Carter Browne wrote:
> A single instance of stunnel can be a server or a client depending on  
> the settings.  For this configuration, you would want host3 to be a  
> server not a client.
> Thus, you need the intermediate port on server2 to server as both a  
> client and a server:
>
> In your configuration files you would need:
>
> Host1:
> [secure_telnet]
> accept = local:23
> connect = host2:host2port1
> client = yes
>
> Host2:
> [incoming_telnet_relay]
> accept = host2:host2port1
> connect = local:host2port2
> client = no
>
> [outgoing_telnet_relay]
> accept =local:host2port2
> connect = host3:host3port1
> client = yes
>
> Host3:
> [incoming_telnet]
> accept = host3:host3port1
> connect = local:23

Carter,

What's the advantage of this setup over a direct connection from Host1
to Host3?

 Host1:

 [secure_telnet]
 accept  = local:23
 connect = host3:host3port1
 client  = yes

 Host3:

 [incoming_telnet]
 accept  = host3:host3port1
 connect = local:23
 client  = no

If e.g. Host3 isn't directly reachable from Host1, a simple port
forwarding (without decryption and re-encryption) on Host2 would
suffice.

Ludolf

-- 

Ludolf Holzheid

Bihl+Wiedemann GmbH
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