By default ports 22, 80 and 443 are open. Port 22 is reserved for SSH access, and 80 and 443 can be used for your applications.
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You may be used to use the ufw ("Uncomplicated Firewall") command to manage your port settings on a Linux workspace. However, this tool is running on the workspace itself and cannot add any open ports because the security group rules we use are applied one step higher, on the level of the cloud system. Also, you risk to lock yourself out of your workspace by inadvertently closing port 22 on uwf level. It does happen! |
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