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Unable to Use Telnet Because Firewall is Blocking "System"

RalphMalph

I am trying to use a telnet connection between a custom app and a terminal emulator and Sophos Firewall blocks the connection saying invalid checksum for "system".  I have no idea how to add a checksum for "system".  What is this trying to tell me?

:48470


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    Thanks for the response.  I've been getting help with this elsewhere and still have not solved the problem.  It doesn't look like the firewall is blocking the messages, but it is still not working.  Seems that some of the tools to investigate this problem don't work under Windows 8 for a local loopback on localhost. 

    :48984
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    Thanks for the response.  I've been getting help with this elsewhere and still have not solved the problem.  It doesn't look like the firewall is blocking the messages, but it is still not working.  Seems that some of the tools to investigate this problem don't work under Windows 8 for a local loopback on localhost. 

    :48984
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