Linuxteaching
Port
How to List Open Ports on Linux?
How do I see open ports in Linux? How do I check if port 3306 is open Linux? How do I check if port 22 is open on Linux? How do I check if port 443 is...
How to Check If a Port Is in Use in Linux
How to check if port is in use in Open a terminal application i.e. shell prompt. Run any one of the following command on Linux to see open ports sudo ...
Ufw Firewall Allow SSH
To allow all incoming SSH connections run this command sudo ufw allow ssh. How do I enable SSH in Ubuntu firewall? How do I allow UFW port range? How ...
How to Secure SSH Connections with Port Knocking on Linux CentOS
How secure is port knocking? What is SSH knocking? What is port knocking in Linux? What is Knockd? Is Port knocking still used? Why is port knocking i...
How to List Open Ports in Firewalld
How can I see what ports are open Firewalld? How do you check which ports are open in firewall Linux? How do I check if port 3306 is open Linux? How d...
How To Create an SSH tunnel on Linux using Mole
How do I create a SSH tunnel in Linux? How do I tunnel using SSH? What is SSH tunneling Linux? How do I create a SSH tunnel in PuTTY? How do I connect...
Ubuntu Allow Port Through Firewall
Ubuntu and Debian Issue the following command to open port 1191 for TCP traffic. sudo ufw allow 1191/tcp. Issue the following command to open a range ...
Scanning UDP with Nmap
Fortunately, Nmap can help inventory UDP ports. UDP scan is activated with the -sU option. It can be combined with a TCP scan type such as SYN scan ( ...
Telnet to a Specific Port for Testing Purposes
How do I use Telnet to test a port? How do I test a specific port? Can I use Telnet to test UDP port? How do I connect to a specific port? What are th...
How to Allow HTTP and HTTPS Services in FirewallD
How do I enable HTTP in Firewalld? How do I add https to Firewalld? How do I enable 443 port on Linux? How do I enable a HTTP port? What is a rich rul...
5 ways to check if a Port is open on a remote Linux PC
Best ways to check if a Port is open on a Linux PC nc netcat command. nmap network mapper tool. telnet telnet command. echo > /dev/tcp/.. netstat –...
How to Open Firewall for NFS Share in Linux
How do I allow NFS through firewall? How do I access NFS share on Linux? Which ports do I need to open in the firewall to use NFS? What port does NFS ...