If you have enabled and configured the Synology Firewall you will need to create exceptions for any containers that have a Web UI or have any incoming or outgoing connections.
Make a note of the ports used in the compose section of the guide you are following, these will be the ones you need to create exceptions for.
(Please note this is a generic section and will not show the specific ports used in this guide however it applies in the same way)
Also, I would like to refer people to the great guide on getting the Firewall correctly configured over on WunderTechs site.
Head into the Control Panel> Security > Firewall, from here click Edit Rules for the profile you set up when you enabled the Firewall.
Next click on Create and you will see the screen below. Source IP and Action will be automatically selected to All and Allow, I will leave it up to you as to your own preference on whether you want to lock down specific Source IPs from having access. In this example we will leave as All.
You will now choose ‘Custom‘ and then the Custom button
Now select Destination from the drop-down menu, most web based containers require TCP access but check the guide as it will show the port and protocol. Then add comma separated ports. Then press OK.
Click OK a couple of times to get back to the main screen. You will see by default the new rule is added to the bottom of the list. You must always have your Block All rule last in the list as the rules are applied top down so move your container up.
The changes are complete, so you can move on with the rest of the instructions from the guide you were following.
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