First of all, in addition to the address, the database connection also needs the account password, which is not the so-called "no security at all" as the landlord said. Knowing that the company IP can't get in without an account password is just like knowing the address of the QQ webpage. You still need an account password if you want to log in, unless you can hack into it.

Then talk about other users' answers. If you really don't understand, don't talk nonsense. It will make you laugh. Intranet doesn't mean free service, and the intranet and extranet of database don't mean what you said. The extranet address of the database allows users to log in and access the extranet. Intranet address is used for intranet login and access. To a certain extent, the intranet address will be safer.