Today is...
Wednesday, June 28, 2017
Welcome to Control.com, the global online
community of automation professionals.
Featured Video...
Featured Video
EtherCAT with CTC’s master lets your multivendor network play well together...
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive
Modbus TCP/IP and Proxy
How does the Modbus TCP/IP work when the ports used are disabled? can it use a proxy to go through that?

Hello,

I am working on a modbus TCP/IP client (studying it), and i have an issue for the Modbus client/server connection.

Suppose the client communicate using the port 1050, and the server listens to port 502, and there's a router between them. what if in the router blocks the port 1050 or 502 or both?

Can the client use a proxy to avoid using the port 1050?

Is there a solution to avoid the firewall blockage also?

I'm trying to figure out the cases where the connection can't be made, if you see other cases please let me know.

Thanks.
Regards.