Another way of illustrating my needs, when it comes to telnet com.
I want to estabilish a "gateway". I understand that vee do not go below port 1024.
I am thinking, non vee sw (.dll) that bind 23 and connect to port 12345 bind by vee. Non vee sw rx data on port 23 and tx received data on port 12345, and Non vee sw rx data on port 12345 and tx data on port 23.
Could this work and are it possible on win xp?
I understand that telnet understanding are needed when/if gateway are estabilished
BR
Kjeld Alexander
----- Original Message -----
From: "Shawn Fessenden" <shawn@vrfarchive.com>
To: "VRF" <vrf@agilent.com>
Sent: Thursday, July 10, 2008 8:31 PM
Subject: RE: [vrf] Fw: Telnet
>> Will this help?
>
> Well it proves Windows has an inetd
>
> I think the object here is to monitor traffic to identify the client
> transmissions necessary to initiate a Telnet session to a specific server.
> If that's incorrect then I've been laboring under the wrong impression.
>
> At any rate, if you want to use Telnet to send commands to a computer it's
> one of the easiest ways to do so. Rather than implement a full client, all
> you really need to do is capture the conversation between client & server
> up
> to the point you get a prompt and just emulate that in VEE.
>
> The problem is you can't listen in on a port once a connection is
> established. That's why I said use Wireshark.
>
> You can easily make a connection & look at the data coming back from the
> server, but in the case of Telnet that doesn't really help a whole lot as
> the protocol is strictly binary - and relatively complex when compared to
> protocols like mail & news. Once you establish a session it's a piece of
> cake but until then you must support the negotiation sequence.
> -SHAWN-
>
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I want to estabilish a "gateway". I understand that vee do not go below port 1024.
I am thinking, non vee sw (.dll) that bind 23 and connect to port 12345 bind by vee. Non vee sw rx data on port 23 and tx received data on port 12345, and Non vee sw rx data on port 12345 and tx data on port 23.
Could this work and are it possible on win xp?
I understand that telnet understanding are needed when/if gateway are estabilished
BR
Kjeld Alexander
----- Original Message -----
From: "Shawn Fessenden" <shawn@vrfarchive.com>
To: "VRF" <vrf@agilent.com>
Sent: Thursday, July 10, 2008 8:31 PM
Subject: RE: [vrf] Fw: Telnet
>> Will this help?
>
> Well it proves Windows has an inetd
>
> I think the object here is to monitor traffic to identify the client
> transmissions necessary to initiate a Telnet session to a specific server.
> If that's incorrect then I've been laboring under the wrong impression.
>
> At any rate, if you want to use Telnet to send commands to a computer it's
> one of the easiest ways to do so. Rather than implement a full client, all
> you really need to do is capture the conversation between client & server
> up
> to the point you get a prompt and just emulate that in VEE.
>
> The problem is you can't listen in on a port once a connection is
> established. That's why I said use Wireshark.
>
> You can easily make a connection & look at the data coming back from the
> server, but in the case of Telnet that doesn't really help a whole lot as
> the protocol is strictly binary - and relatively complex when compared to
> protocols like mail & news. Once you establish a session it's a piece of
> cake but until then you must support the negotiation sequence.
> -SHAWN-
>
> ---
> You are currently subscribed to vrf as: k.alexander@get2net.dk
> To subscribe please send an email to: "vrf-request@lists.it.agilent.com"
> with the word subscribe in the message body.
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> Search the "unofficial vrf archive" at
> "http://www.vrfarchive.com/vrf_archive".
> Search the Agilent vrf archive at "http://vee.engineering.agilent.com".
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Just a thought...A dll that binds port23 (like telnet server) that one could call for rx data and call for tx data...Is that possible?
BR
----- Original Message -----
From: "Shawn Fessenden" <shawn@vrfarchive.com>
To: "VRF" <vrf@agilent.com>
Sent: Thursday, July 10, 2008 4:04 PM
Subject: RE: [vrf] Fw: Telnet
>> ( just plain to/from sockets)
>
> That won't do in the first place. To/From Socket won't bind to any port
> less
> than 1024.
>
> Secondly, if port 23 is already bound to (and if a Telnet server is
> running
> on the same machine it binds to port 23) the port is already in use and
> can't be bound to anyway.
>
> Hence, the only way to watch traffic is to use a general purpose protocol
> analyzer or at least insert something into the TCP/IP stack to watch
> traffic
> on that port.
> -SHAWN-
>
>
>
>
> ---
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>
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