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Anyone know how to make a hyperterminal server?

Posted on 2009-04-27
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Ok, so i have this PC at a clients site, and currently if i want to access one of the cisco devices, i have an on site tech move the console cable from one device to the next.

I am currently toying with an idea of picking up some usb console cables to be able to access all 3 without having to move the cable around.

however the major hurdle we have is when there is a problem i cannot remotely access anything, so i was thinking about one of those 3g sticks.

to save on bandwidth i am looking for a command line app instead of RDPing to a pc just to use hyper terminal.

has anyone tried this before, has anyone been able to create a way to say use putty to the pc, then chose the device i want and access it directly?
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Question by:funnymanmike
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thekod earned 375 total points
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I would recommend using OpenSSH for Windows, http://sshwindows.sourceforge.net/, to run an SSH server on the computer.

You could then connect to the computer via SSH, then use the command line version of putty, plink, to connect to the com port you're looking for.  To avoid dynamic IP issues, you could use DynDNS.org, or run a dynamic DNS server yourself.

Bear in mind that putty only supports connecting to serial connections since version .59, and plink doesn't have a command for serial connections, so you should create saved sessions in the GUI version of putty, then run `plink -load sessionname` to connect to each device.
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by:funnymanmike
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Thanks thekod
 why would i have problems with dynamic ip issues?

i don't know if i entirely follow your suggestion regarding the session name
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by:thekod
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Because you would be using a cell phone connection, whether EDGE or 3G, the cell phone provider will almost certainly give you a dynamic IP address, which will change frequently.  By using a dynamic dns service, you will be able to target a hostname, IE funnymanmike.dyndns.org, which will consistently resolve to the correct IP address, even if that address changes every hour.

As far as the sessions, if you were attempting to command line SSH, you could specify the correct options when executing plink, IE `plink -ssh login.example.com`.  However, plink doesn't currently have a -serial argument.  Therefore, open putty, set all your settings for one of the connections, then save it with whatever name you like -- sessionname being an example.  Then, when you SSH into the machine, you will be able to connect to that saved session by executing `plink -load sessionname`
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by:funnymanmike
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thanks again thekod,

so have putty on the 'server' system, configured for each connection, each saved as 'connection1', 'connection2' etc

then from my own pc, i putty to the 'server' system with the plink command to connect to 'connection1'

am i understanding this properly?
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by:thekod
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You would putty to the server system normally, using the GUI, selecting SSH, typing in the hostname, etc.

You would use plink once you had connected to the server system; to connect to the switches over the serial connection.
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