External and internal server can ping each other, through static NAT translation IP NAT inside source static 10.10.252.100 10.243.74.225 but external server via Telnet test port connection failure Telnet 10.243.74.225 ports 3306 and 9123 internal server port is normally open. There is no any application Acess router - list of security policies have bosses solve 23333 [face] monkey2:019 PNG [/face]

CodePudding user response:

Access to the host and eventually caught on the host, to see if the Telnet process, is the 23 TCP port first shake hands again, clear text transmission, contrast, and see if the final host receives the syn messages, to be confiscated and dnat has a problem, received, no back, just check the final equipment problems

CodePudding user response:

Simulation today about the other network environment test results show that success may be provided by the terminal network problem thank eldest brother solution!

CodePudding user response:

reference 1st floor wj31932 response:

access to the host and eventually caught on the host, to see if the Telnet process, is a TCP port 23 first shake hands again, clear text transmission, contrast, and see if the final host receives the syn messages, to be confiscated and dnat has a problem, received, no back, just check the final equipment problems

thank you big brother