I have configured a cisco firewall asa (in packet tracer) to allow only modbus tcp port 502 to go though the firewall from 4 inside client (172.16.0.1-172.16.0.4) to outside server by writing acl and then auto natting. Is this configuration correct? how can i check that only port 502 is through...
Mark VIe HMI server and Honeywell DCS server(Mark VIe HMI-server,Honeywell DCS-client)are separated by a firewall cisco ASA5512.The client can ping the server but server cannot ping the client as per the rule in firewall.Is it possible to communicate them on modbus TCP/IP?Is it mandatory for...