For anyone that is using Synology NAS and is running applications in Docker you already know that Synologys visual interface to mnage Docker is less than perfect, and you have to dive into using the Terminal and issue commands there if you want to get anywhere.
One of the problems I originally was accessing any ports on the Synology NAS itself from any Docker container, and finding a solution was time consuming. It turns out to be simple compared to most solutions I could find on the Internet.
Go to the Synology Control panel -> Network -> General ->Advanced settings and turn off “Enable Multiple Gateways”
