With HeatShield, you can restrict access to your PostgreSQL database server so it can only be accessed from the IP addresses that need to communicate with it.
For example, if you access your PostgreSQL server from multiple web servers, you can create a ruleset in HeatShield to open the PostgreSQL port on your database server to only your web servers.
Similarly, if you need to access PostgreSQL from your office as well, you can use HeatShield to allow access from your office's IP address.
To use HeatShield to limit access to your PostgreSQL server, you can create a new ruleset that contains only the rules related to PostgreSQL. If you have multiple PostgreSQL servers, you can apply this ruleset to each PostgreSQL server.
First, connect your database server to HeatShield and upgrade it to use custom rulesets.
Then, open your Rulesets page and click Create Ruleset.
Next, name your ruleset and click Create Ruleset.
Now, create a new firewall rule by selecting the policy, the destination, and the source.
Set the Policy to Allow.
Select Custom from the Destination dropdown and enter TCP 5432 as the PostgreSQL port.
Select Custom from the Source dropdown and enter the first IP address you want to allow access to PostgreSQL. This could be, for example, the IP address of one of your web servers or your office IP address. Click Add.
Repeat this step for each additional IP address you want to allow access to PostgreSQL. You'll have a list similar to this example:
To apply your new PostgreSQL ruleset to your database server, open the server in HeatShield.
Select your PostgreSQL Database ruleset from the drop-down list and click Apply Ruleset.
Your new ruleset will be applied.