Mysql can restrict the IP ranges from which it accepts a connection. Even when a 3rd party got a hold of username and password, he likely wouldn't be able to log in to the database, from where he sits.

Actually, in our case, the whole section 4.2, "General Security Issues and the MySQL Access Privilege System", looks to be worth a read.

In reply to Re: ideas needed to query remote database securely by bart
in thread ideas needed to query remote database securely by Qiang

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