Allowing client access

[Timmy Siu <timmy.siu@xxxxxxx>]

Dear All Users,

• How do I allow an external client IP address access to my pgsql server?

    According to my own experience and test, if I set the external
      client IP address to, for example, 111.222.333.444 in the file
      /etc/postgresql/11/main/pg_hba.conf, it will not be able to
      connect to the server:
    #TYPE?????? DATABASE?????? ?? USER?????? ?????? ?????? ADDRESS?????? ?????? ?????? METHOD
    host?????? all?????? ?????? ?????? testuser ???? ?????? 111.222.333.444??????
      md5
    
    I must set "address" to "any" as in the following:
    #TYPE?????? DATABASE?????? ?? USER?????? ?????? ?????? ADDRESS?????? ?????? METHOD
      host?????? all?????? ?????? ?????? testuser ???? ?????? 0.0.0.0/0?????? ?? md5

• Can I limit access to my pgsql server through TCP Wrapper? What is the related executable?

Regards,
Timmy

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