Here's how you can enable the firewall (UFW) on Linux:
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### How to Enable the Firewall (UFW) on Linux
#### Introduction
Enabling the firewall on your Linux system is crucial for securing your server. This guide will walk you through the steps to enable UFW (Uncomplicated Firewall) on your Linux server.
#### Steps to Enable UFW
1. **Install UFW**: If UFW is not already installed, you can install it using the following command:
```bash
sudo apt install ufw
```
2. **Check UFW Status**: Before enabling UFW, check its current status:
```bash
sudo ufw status
```
This command will show whether UFW is active or inactive.
3. **Enable UFW**: To enable UFW, use the following command:
```bash
sudo ufw enable
```
This will start the firewall and apply the default rules.
4. **Allow SSH**: By default, UFW blocks all incoming traffic except for SSH. To ensure you can still access your server remotely, allow SSH:
```bash
sudo ufw allow ssh
```
5. **Allow Other Services**: If you need to allow other services (e.g., HTTP, HTTPS), use the following commands:
```bash
sudo ufw allow http
sudo ufw allow https
```
6. **Check UFW Status Again**: Verify that UFW is enabled and the rules are in place:
```bash
sudo ufw status
```
#### Conclusion
By following these steps, you have successfully enabled UFW on your Linux server, helping to secure your system against unauthorized access.
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