Access container from WAN(internet) on VPS

[rimelek (Ákos Takács)]

Check your firewall. UFW for example:

Docker Compose network: cannot use default docker gateway to connect to host machine from container, unless a custom network is manually specified

I always wanted to play with ufw. You gave me the reason so tried it, although I suspected the result even before that. I had to find out what gave you the output you quoted in your post. I found that ufw status verbose shows ALLOW IN and simple ufw status shows only ALLOW. This rule 5432 ALLOW IN 172.17.0.0/16 can be created this way: ufw allow from 172.17.0.0/16 to any port 5432 It means you allow access FROM 172.17.0.0/16 to port 5432 on ANY IP address. When you …

But it can be firewalld or anything. It depends on the Linux distribution.