ROS dst-nat Port Mapping restricts access to Mapping IP
Requirements: externally mapped ports want to restrict access to the source IP, so as to avoid malicious access or scanning.
First, mapping. Say no more about this, search a lot on the Internet!
Second, impose access restrictions on the mapping:
1. First make some address lists: firewall---address lists-"+"
2. List of mappings applied to restrict access
Finish the job.
