Add new VCN

Create new VCN

– it is preferable as a good practice.

You can use existing VCN but when you opening required ports you opening those ports for complete subnet – you want to control to what you opening to the public.

Click – Network/Virtual Cloud Network/Craete VCN

Enter VCN Name
Select Compartment
Define CIDR Block – as in this VCN will be only one or two servers use small subnet ( good subnet calculator is at

Create Subnet for this VCN

Enter Name
CIDR BLOCK – I am using this same as for VCN
Routing Table – you can have different routing tables but only one is active.
Select Public Subnet – you want this subnet to access from outside.

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