SSH connection possible only from addresses added to the allowed list. You cannot completely disable access restriction.
The list of currently allowed addresses is displayed at the bottom of the section "SSH access"And looks like this: In the line with each address, you can add an arbitrary note to it and remove this address from the list.
*- any numbers, then these are local network addresses. To find the external IP address, use the tool IP definitions.
To add an address to the allowed list, do the following: