FNET Actively Refusing Connection

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Created: 2019-08-26

Updated: 2019-08-28

Jim Fell - 2019-08-26

What could cause FNET (version 4.0.0) to actively refuse a connection? My client is getting this error, but no matter what I've tried I've been unable to get the error on my local network. Power-cycling their board does not clear the error, but issuing a reset command over telnet, which calls fnet_release() followed by fnet_cpu_reset() does clear the error. Searching the stack source for "refuse" or "deny" variations also yields no results. Any help would be great.

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Jim Fell - 2019-08-28

It appears that our Modbus service startup may have been getting delayed or failed for some reason, so the port to monitor for the traffic wasn't active.

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