Can anyone explain that is this method is practically possible or not?
Here is a step-by-step guide using OpenVPN on a cloud provider, like
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly. To set up a VPN tunnel between your on-premise 3CX and a cloud instance to bypass
firewall issues, here is a step-by-step guide using OpenVPN on a cloud provider, like
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly. To set up a VPN tunnel between your on-premise 3CX and a cloud instance to bypass
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly.
Here is a step-by-step guide using OpenVPN on a cloud provider, like
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly. To set up a VPN tunnel between your on-premise 3CX and a cloud instance to bypass
firewall issues, here is a step-by-step guide using OpenVPN on a cloud provider, like
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly. To set up a VPN tunnel between your on-premise 3CX and a cloud instance to bypass
Oracle Cloud or digital ocean. This setup provides a secure, single port tunnel, minimizing
firewall configuration needs.
Prerequisites
1. A cloud account on Oracle Cloud (Free Tier), DigitalOcean, or another provider.
2. Access to your on-premise 3CX server and your firewall/router settings.
Step 1: Set Up a Cloud Instance
1. Sign in to your cloud provider (Oracle or DigitalOcean).
2. Create a Virtual Machine (VM):
a. Choose a small instance type, like Oracle’s Free Tier VM or a DigitalOcean
droplet.
b. Select Ubuntu or Debian as the operating system (works well with
OpenVPN).
3. Configure Networking:
a. Assign a static IP to the VM (some providers include this for free).
b. Open port 1194 (UDP) in your cloud provider’s firewall settings for OpenVPN
(or choose TCP if required).
Step 2: Install OpenVPN on the Cloud Server
1. Connect to your Cloud VM:
a. Use SSH to connect to your instance:
ssh user@your-cloud-ip
2. Install OpenVPN:
a. Update the package list:
sudo apt update
b. Install OpenVPN and Easy-RSA:
sudo apt install openvpn easy-rsa
3. Configure Easy-RSA for Certificate Generation:
a. Make the Easy-RSA directory:
make-cadir ~/easy-rsa
cd ~/easy-rsa
b. Initialize PKI and create certificates for the server and client.
4. Configure OpenVPN:
a. Create and edit the OpenVPN server configuration file
(/etc/openvpn/server.conf) with basic VPN settings.
b. Make sure port 1194 and proto udp are set (adjust to TCP if needed).
5. Start OpenVPN:
a. Enable and start OpenVPN:
sudo systemctl start openvpn@server
sudo systemctl enable openvpn@server
Step 3: Configure OpenVPN on the On-Premise 3CX Server
1. Install OpenVPN Client on your 3CX server if it’s a Linux machine, or download the
client on Windows.
2. Import the VPN Configuration:
a. Transfer the VPN configuration file generated from the cloud instance to the
3CX server.
b. Start the OpenVPN client on the 3CX server and connect using this
configuration.
Step 4: Adjust Firewall Settings
1. Firewall Adjustment on 3CX Location:
a. Open only port 1194 (UDP) (or the port you configured) for outgoing VPN
traffic.
b. No additional SIP or media ports need to be configured for NAT, as all 3CX
traffic will route over the VPN.
2. Test the VPN Connection:
a. Once the VPN is active, ensure your on-premise 3CX can communicate
through the VPN tunnel to the cloud instance.
Step 5: Configure 3CX to Use the VPN Connection
1. Set 3CX Server to Use VPN IP:
a. In your 3CX management console, configure it to communicate through the
VPN IP addresses.
2. Test Calls and Connections:
a. Test internal and external calls to confirm that the VPN tunnel is handling the
traffic properly.
