Steps to Configure Bidirectional Connectivity Between Public and Private Networks

In this setup, we aim to establish bidirectional traffic connectivity between a Jumpserver (located in the public subnet) and an **Application server ** (located in the private subnet) within the same VCN.

Step 1 : Check connectivity

In this scenario, Test_Instance serves as the jumpserver, while Test_custom_Instance functions as the application server.

First, we login to jumpserver (Test_Instance) via key/password

Next, we will add an ingress rule for the TCP protocol on port 22 and the ICMP protocol in the VCN (Test_VCN) to establish connectivity.

Now, attempt to ping the application server from the jumpserver using the command ping

As we can see in below secreen, connection is establised

Next, we will try Telnet command again we can check connection is established to an application server

Step 2 : Generating keys

Now create a directory named Keys

mkdir keys

ls -lrth

go to the Keys dirctory

cd keys

now create a file named privatekey in pem format (here Privkey.pem)

vi privkey.pem

paste the private key in pem format then save and exit

next change the access permissions of privkey.pem file

chmod 600 privkey.pem

Now, attempt to access the private application server by executing the following command.

ssh -i /root/keys/privkey.pem [email protected]

As we can see, we have successfully configured and established connectivity between the public and private servers.