MySQL拒绝远程连接

Question

Using: MySQL/MariaDB Ver 14.14 Distrib 5.7.23 Ubuntu 16.04.5 LTS (GNU/Linux 2.6.32-042stab131.1 x86_64)

Everything works perfectly from the local machine (a remote dedicated server) such as PYPMyAdmin, SQLAlchemy, etc, but it will not accept any remote connections. I can telnet to the MySQL port, it gives me a login prompt, and I have already set the remote user up with:

GRANT ALL PRIVILEGES ON . TO 'admin'@'%' IDENTIFIED BY 'p4$$w0rd' WITH GRANT OPTION; FLUSH PRIVILEGES;

And yet I still get the following error when I try to login remotely via Python/SQLAlchemy. "Access denied for user 'admin'@'myrdns.myisp.net"

Is there some additional security feature that I need to tweak that I am unaware of to enable remote access to one server from another?

Answer 1

You need to change/add grants for your desired username in order to access your database remotely, ie

GRANT ALL PRIVILEGES ON *.* TO 'user'@'%' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;

You'll need to issue the following command as well, before being able to connect.

FLUSH PRIVILEGES;

Since you (probably) did it already, you might wish to check your config file, in order to see if there's any bind address being set. In case of editing your config file, you'll need to issue server restart.

Sometimes it's due to some firewall blocking rules as well, but you'll need to confirm and resolve it on your network/machine if that's the case.

Be warned, however, that it is advised that you set up SSL certificate if you allow remote access to your database. Also be aware that you can issue remote login without logging in "directly", ie you can connect to your remote machine/server via SSH client , then connect to your mysql server via localhost/127.0.0.1 address.