Help changing port on TINY remote control program

[mikeweber3]

I am using a shareware program to remote control a DOS 6.22 workstation from a windows viewer over the internet.
It works great and I want to run concurrant sessions on the same WAN. In order to do that I will have to change the port

The Viewer is written in JAVA.
The Host is written in C.

The developer lists a switch option for changing the JAVA VIEWER, but I see no way to switch the port setting in the HOST.

If you have interest in helping me you can see the developer's web page at

http://josh.com/tiny/

Thanks in advance. MIKE

[Banfa]

Why would you need to change the port, you would only need to change the port if you are trying to run several hosts on the same machine. Several viewers attaching to different host ought to be fine with the hosts all having the same port number.

[mikeweber3]

Maybee you are correct.
This program allows several viewers to conect to the same host, which is not what I want.
Do you think I can tell my router to not connect a new viewer to to a host that is currently being used by another viewer.
The packet protocol is UDP which I believe is connectionless.

I appreciate your interest. Any suggestions?

[Banfa]

Do you think I can tell my router to not connect a new viewer to to a host that is currently being used by another viewer.

No the router on your network will have no knowledge of what connections are used for which purpose and therefore no knowledge of when a viewer is already connected.

You could write the host software so that once it has accepted 1 connection it doesn't accept any more (if you have access to the code).

[mikeweber3]

Thanks again.

The most desireable to me would be to change the port assignment on each of 3 desired Host machines. I can then assign each of 3 specific VIEWERS their own port and therefore their own Specific HOST. I can set my router to
forward each separate port to a separate internal IP.

The problem is that I am not a programmer. It looks like to me that the designer has put a reasonably simple method in place to change the port assignment on the Host which is written in C.

Surely someone has done this already, but I have tried hard and can't find them. The shareware developer Josh Levine [e-mail] sh.com hasn't been returning my requests for this. He was very helpful VIA E-mail support helping me get 1 copy of the system running.

Would you or someone you know re-compile 2 versions of the HOST program for me in C with two new port #s. About how much do you think this would cost?

Here is the WEB address of the program http://josh.com/tiny/
If you download the Tinhostsource.z ip it has about 8 files in it.
It seems to me to have documentation a programer would understand on how to accomplish this.

Is it ok for me to put my toll free phone number here for you or someone to call me?

Thanks Mike

[Banfa]

Is it ok for me to put my toll free phone number here for you or someone to call me?

I have no objection to you doing this, however I very very very strongly extremely with every fiber of my being recomend that you don't.

Remember every man and his dog can view these forums so you should only post it if you want to receive phone calls from every mans dog. Additionally it may be toll free in your country (which I am guess could be the USA since that isn't what we call freephone numbers over here) but would I really be able to call it without charge from my country. Even if this was possible I would still be unlikely to phone you.

[Banfa]

The most desireable to me would be to change the port assignment on each of 3 desired Host machines. I can then assign each of 3 specific VIEWERS their own port and therefore their own Specific HOST. I can set my router to forward each separate port to a separate internal IP.

A ha, now I finally understand the problem (let this be a lesson to you, you have asked for the solution you think will solve your problem without describing the actual problem up to now hence my confusion, I am trying to solve something without all the facts).

I thought you wanted to be able to view 3 DOS machines from a single computer.

However what you want to do is to be able to have 3 separate people (clients?) view 3 separate DOS computers through your router without any of them being able to view the 2 computers they are not meant to have access to right?

Right firstly the hosts are still running on separate machines so no need to recompile them with different ports. This can all be done in the router.

You have 3 DOS machine which I shall call DM1, DM2 and DM3 all running TINY through a port I shall call TP. Your router has an external IP address I shall call REI.

What you do is in the router set up port forwarding to forward different external ports of the router to TP on the 3 DOS machines I shall call these ports REP1, REP2 and REP3. So you should have the following forwarding table

REI:REP1 -> DM1:TP
REI:REP2 -> DM2:TP
REI:REP3 -> DM3:TP

For added security set different TINY passwords at each DOS machine so that even if 1 person manages to guess the external port of a different machine they wont be able to log onto it.

[mikeweber3]

If I understand, I agree with your solution. I tried it several days ago and it didn't work. The problem is that when the external machine sends a port assignment other than 6363 or 25443 the TINY-HOST will ignore the packet even if it gets to the proper machine.

HOWEVER.......Y ES!!!!!!!!!!!!! !!!

Josh (the TINY programmer) is awesome. He sent me an E-Mail this AM with a new version of the HOST which has a switchable port. I think he wrote it just for me as it has a 10-26-2006 date stamp. Now I will do exactly what you said and it should work great.

I still don't understand how guys like you and Josh make money. At any rate I really appreciate your help.

Thanks Mike

[loopsteron]

can some1 send me this version by email.
<email snipped>

thanks in advance

If I understand, I agree with your solution. I tried it several days ago and it didn't work. The problem is that when the external machine sends a port assignment other than 6363 or 25443 the TINY-HOST will ignore the packet even if it gets to the proper machine.

HOWEVER.......Y ES!!!!!!!!!!!!! !!!

Josh (the TINY programmer) is awesome. He sent me an E-Mail this AM with a new version of the HOST which has a switchable port. I think he wrote it just for me as it has a 10-26-2006 date stamp. Now I will do exactly what you said and it should work great.

I still don't understand how guys like you and Josh make money. At any rate I really appreciate your help.

Thanks Mike