OCI; Oracle Cloud Instance; Quick how to enable DynMap
This quick How to is based on Ubuntu ARM64 with the free Oracle Cloud Instance (4 vCores / 24GB Memory / 200GB disk space)
In this tutorial, I'll not cover the creation of the instance, nor the installation and/or management of your Minecraft server.
Focus will be held on DynMap access.
Go to your console, next in the menu, go to "Networking" and then select "Virtual Cloud Networks"
On the new page, you should see your virtual network (in the form of "vcn-....", by default), select it. After that, select your subnet and then, the "Default Security List" (only one of each).
You should get a page similar to this screenshot :
Select "Add Ingress Rules"
The first rule we add is for accessing DynMap :
So, as the source, we set it to ANY, so : 0.0.0.0/0
For the port, if you let the default one : 8123
The protocol is TCP (standard for HTTP)
Then, we also need to allow the access to our Minecraft server (depend on which version you installed and/or mods to allow either clients to connect to your Java server)
For all those settings, adapt the destination ports to your needs.
After that, you should have some rules like those one :
A little of explanations here :
"Stateless" ==> We do not want to manually create Egress rules, so we do not check this box and let the system handles the connections. If we had selected it, we would had needed to create a rule to allow ANY destination to get out of our server from the DynMap web server port (to any destination port (as this is a random port, never the same).
"Source CIDR" ==> We want to get ANY outside connection to connect to our server, so we specify, in CIDR notation, all, with 0.0.0.0/0
"Source Port Range" ==> Is defined by the client host (random), so we let this box empty.
"Destination Port Range" ==> For this one, we set to the value of the destination service.
For this part, there is two ways to achieve this goal :
First, and not mandatory (so you can skip those initials commands), we restrict any inbound connections.
sudo ufw default allow outgoing
sudo ufw default deny incoming
Now, we are going to open some ports, first SSH access (in case you change from the default SSH port (22/tcp), adapt the command accordingly), then DynMap (8123/tcp) and the port for the Minecraft server :
sudo ufw allow ssh
sudo ufw allow 8123/tcp
sudo ufw allow 25565/tcp
sudo ufw allow 19132/udp
Add any rules you needs, then once done, we enable the firewall with those new rules (and check that everything is OK with the status command) :
sudo ufw enable
sudo ufw status
To be completed, later... :D
In the end, you should be able to access your map with the address : http://Your_Server_Public_IP:Your_DynMap_Web_Port (port, by default is 8123).
