How to set up network proxy and firewall on Kirin operating system?

How to set up network proxy and firewall on Kirin operating system?

Kirin operating system is a Linux-based operating system that is widely used in government agencies, enterprises and institutions. For those users who need to set up network proxies and firewalls, Kirin OS provides a series of powerful tools and functions to meet their needs. This article will introduce how to set up network proxy and firewall on Kirin operating system, and provide corresponding code examples for readers' reference.

1. Network proxy settings

1. Installing proxy software

On the Kirin operating system, you can use Squid to build a proxy server. First, use the following command to install Squid:

sudo apt-get install squid

2. Configure proxy server

Edit Squid's configuration file and use the following command to open the configuration file:

sudo vim /etc/squid/squid.conf

In the configuration file, you can set the proxy server port, access control rules, etc. Here is an example:

http_port 8080
acl localnet src 192.168.0.0/16
http_access allow localnet

You can modify the configuration file according to your needs, save and exit.

3. Start the proxy server

After the configuration is completed, use the following command to start the proxy server:

sudo systemctl start squid

At this point, the network proxy settings have been completed.

2. Firewall settings

1. Install firewall software

On the Kirin operating system, you can use iptables to configure the firewall. First, install iptables using the following command:

sudo apt-get install iptables

2. Configure firewall rules

Enter the following command in the command line to configure the firewall rules:

sudo iptables -P INPUT ACCEPT
sudo iptables -P FORWARD ACCEPT
sudo iptables -P OUTPUT ACCEPT
sudo iptables -F

Above The command will allow all incoming, forwarding, and outgoing traffic and clear all firewall rules.

3. Add firewall rules

The following is an example firewall rule to allow HTTP and SSH traffic to pass:

sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 443 -j ACCEPT
sudo iptables -A INPUT -p tcp --dport 22 -j ACCEPT
sudo iptables -A INPUT -j DROP

In the above command, # The ##--dport parameter specifies the port that is allowed to pass, -j ACCEPT means to accept the passing traffic, and -j DROP means to deny other traffic.

Save and apply firewall rules

Use the following command to save and apply firewall rules:

sudo iptables-save > /etc/iptables/rules.v4

At this point, the firewall settings have been completed.

Summary:

Kirin operating system provides a series of powerful tools and functions for network proxy and firewall settings. By installing and configuring the proxy software Squid, you can build a powerful proxy server; by installing and configuring the firewall software iptables, you can achieve effective network security protection. I hope the introduction and examples in this article can help readers set up network proxy and firewall on Kirin operating system.

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