SQL Maestro Group / Products / PostgreSQL / PostgreSQL Data Sync / Documentation

PostgreSQL Data Sync online Help

Specify the following credentials to connect to MySQL.

•	Direct connection

It is the most natural and the most preferable connection mode. Use it each time it is possible. Most of hosting companies allow direct connections to databases. However in most cases you have to go to your control panel and add your home/office computer IP address or domain name to the Access List - list of IP addresses allowed accessing from outside. More information.

•	SSH tunnel connection

If your PostgreSQL server does not allow direct connections from your remote workstations, you can establish connection to an allowed intermediate SSH server and forward all MySQL commands through the Secure SHell (SSH) tunnel.

•	HTTP tunnel connection

HTTP tunneling is a technique used in conditions of restricted network connectivity including firewalled networks, networks behind proxy servers, and NATs. It is the slowest way and is recommended to use if the others are impossible.

Irrespectively of a connection mode you should specify common credentials as follows:

Host

The host name of the MySQL server.

Port number

The TCP/IP port to use (default MySQL port is 3306).

User name

The username used to connect to MySQL.

Password

The password for the user account on server.

Allow old style password

Turn this option ON only if your MySQL server still uses 16 bytes long password hashes. More information.

More about SSH tunnel connection

To establish connection to intermediate SSH server and forward all PostgreSQL commands through the secure tunnel, you need to:

1.	Check I can connect to the server directly or via SSH tunneling.

2.	Follow the Configure SSH options link to open the SSH Options window.

3.	Check Connect through the Secure Shell (SSH) tunnel and complete the following fields:

Host name

Specify the host name or IP of your site. Note, that PostgreSQL host name always should be set relatively to the SSH server. For example, if both of PostgreSQL and SSH servers are located on the same computer, you should specify localhost as Host name instead of server's external host name or IP address.

Port number

Enter the port number for the SSH server.

4. Enter valid User name for the remote server and select the Authentication method and set corresponding credentials.

Password-based

Set the password corresponding to the specified user.

Key-based

Specify the path to the Private key file with the corresponding Passphrase to log in to the remote server. PostgreSQL Data Sync accepts keys in ssh.com or OpenSSH formats. To convert a private key from PuTTY's format to one of the formats supported by our software, use the PuTTYgen utility that can be freely downloaded from the PuTTY website.

Keyboard interactive

Keyboard authentication is the advanced form of password authentication, aimed specifically at the human operator as a client. During keyboard authentication zero or more prompts (questions) is presented to the user. The user should give the answer to each prompt (question). The number and contents of the questions are virtually not limited, so certain types of automated logins are also possible.

More about connection via HTTP tunnel

To connect to a remote server using an HTTP tunnel, you need to:

Upload the connection PHP script to your website. The installation folder, usually C:\Program Files\SQL Maestro Group\PostgreSQL Data Sync, contains two scripts: mysqli_tunnel.php and mysql_tunnel.php. We would recommend you to use the mysqli_tunnel.php script always if possible as it operates through the MySQLi PHP extension (available since PHP 5) while mysql_tunnel.php uses the original MySQL PHP API that is deprecated as of PHP 5.5.

2.	Select the I have to use HTTP tunneling radio button.

Enter the connection PHP script URL, e.g. www.yoursite.com/files/pgsql_tunnel.php. You can test the connection before the profile is created. Just use Test script using default browser to open connection script in your browser, enter all the required connection parameters and click the Test connection button.

4.	In case using of a proxy server use Configure tunnelling options to open the HTTP tunnelling options window and specify your proxy server connection parameters and HTTP authentication.

Note: You are actually connecting to your database through the PHP script on the server, so in most cases the host/server name is "localhost" unless the target database server is not installed on the same computer as the Web server.