The question is as follows,
Under centos 7, such as the server has two IP address
1.1.1.1
1.1.1.2
And two different usernames and passwords
User1
User2
How to set up to make user1 can use 1.1.1.1 port cannot use 1.1.1.2, user2 can use 1.1.1.1 1.1.1.2 and cannot use