[Info-vax] Reverse telnet to a terminal emulator?

[glen herrmannsfeldt]

Snowshoe <no at spam.please> wrote:

> Is there any such thing as VTxxx-compatible terminal server software 
> that runs on a PC that, instead of actively connecting to a host via 
> telnet, is "passive", it waits until something connects to it?  Once a 
> host connects to it, it acts like a regular VTxxx terminal.  My idea is 
> for VMS to reverse-telnet to it. (TELNET> CREATE_SESSION 10.9.8.7 23 100 
> creates TNA100: on host at IP address 10.9.8.7 port 23) This is to 
> replace a hardwired terminal that doesn't log in, but an application 
> currently allocates it and uses it for part of its operator interface.

I have never heard of one.  Likely it wouldn't use port 23, as 
that would usually be bound to the local telnetd.  It would have
to bind a port, tell you what the port number was, then you would
telnet to that port.

You could use an external terminal server and RS232 connection
to the host.  

You could also write a small program that binds two ports, and
then accepts connections to the two.  It would report the two
port numbers at startup.  Then you telnet to one of them from 
the host end, the other from the VMS end.

> If the answer is "no", an alternative is for someone to use ordinary 
> terminal server SW to telnet into the VMS host and run a do-nothing 
> program that goes into a permanent LEF state, and VMS finds its TNAx 
> device and writes to it, but this is one step I'd rather not have the 
> operators do.

-- glen