Linux Server Vulnerability Scan Tool: Check Your System Security

Linux server vulnerability scanning tool: check your system security

Introduction:
In the Internet era, servers have become an indispensable part of enterprises and individuals . However, as the number of servers increases and their complexity increases, server security becomes an increasingly important concern. To protect servers from malicious attacks and unauthorized access, timely detection of vulnerabilities becomes critical. This article will introduce a Linux-based server vulnerability scanning tool and provide code samples for readers' reference.

1. Install necessary software packages
   In order to build an effective vulnerability scanning mechanism, we need to install some necessary software packages. These packages include:
2. Nmap: A tool for network discovery and vulnerability scanning.
3. Nikto: An open source web server scanner for discovering potential security vulnerabilities.
4. OpenVAS: A set of open source vulnerability assessment and scanning tools.

On Ubuntu systems, you can use the following command to install these packages:

sudo apt-get update
sudo apt-get install nmap nikto openvas

2. Scan the server using Nmap
   Nmap is a powerful The network scanning tool can help us detect the open ports and services of the target server. By detecting open ports on the server, we can discover possible vulnerabilities. The following is a sample code for scanning using Nmap:

   import nmap
   
   def scan_server(ip_address):
    nm = nmap.PortScanner()
    nm.scan(ip_address, arguments='-p 1-65535 -sV')
   
    for host in nm.all_hosts():
        print('Host : %s (%s)' % (host, nm[host].hostname()))
        print('State : %s' % nm[host].state())
        for protocol in nm[host].all_protocols():
            print('Protocol : %s' % protocol)
   
            ports = nm[host][protocol].keys()
            for port in ports:
                print('Port : %s    State : %s' % (port, nm[host][protocol][port]['state']))

In the above code, we create an Nmap scanner object by calling nmap.PortScanner() . Then, use the nm.scan() method to scan by specifying the IP address and the port range to scan. Finally, by traversing the scan results, we can obtain the open ports on the server and their corresponding status.

3. Scan Web servers using Nikto
   Nikto is a vulnerability scanning tool used to scan Web servers. It is able to detect common web vulnerabilities on the server and provide detailed reports. The following is a sample code that uses Nikto to scan a web server:

   import subprocess
   
   def scan_web_server(url):
    command = f'nikto -host {url}'
   
    try:
        output = subprocess.check_output(command, shell=True)
        print(output.decode())
    except Exception as e:
        print(f'Error: {e}')

In the above code, we use the subprocess.check_output() method to execute the Nikto command and capture output. Then, print the output results by calling the print() method.

4. Using OpenVAS for vulnerability assessment
   OpenVAS is a set of open source vulnerability assessment and scanning tools that can help us identify security vulnerabilities on the server and provide repair recommendations. After installing OpenVAS, you can start OpenVAS scanning in the following ways:

   sudo openvas-start
   sudo openvas-setup

   After waiting for the initialization process to be completed, we can use the openvas-cli command line tool or the OpenVAS web interface to perform vulnerability scanning.

Summary:
Server security is crucial, especially for those servers hosting sensitive information. In order to ensure the security of the server, we can use some powerful Linux vulnerability scanning tools and make repairs through the scanning results. This article introduces three commonly used vulnerability scanning tools, Nmap, Nikto and OpenVAS, and provides corresponding code examples for readers' reference. By using these tools, we can discover vulnerabilities on the server in time and take appropriate measures to strengthen the security of the server.

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