Ports conf apache2 ubuntu

1. Can I use port 587 instead 25?
2. How to check ports on Ubuntu?
3. How do I find my Apache port number?
4. Why is port 4444 used?
5. How do I use port 8080?
6. How do I check if port 8080 is open Ubuntu?
7. Is port 8080 a port 80?

Can I use port 587 instead 25?

Originally, the Simple Mail Transfer Protocol (SMTP) used port 25. Today, SMTP should instead use port 587 — this is the port for encrypted email transmissions using SMTP Secure (SMTPS). Port 465 is also used sometimes for SMTPS. However, this is an outdated implementation and port 587 should be used if possible.

How to check ports on Ubuntu?

Check for open ports using lsof

The lsof (list open files) command, as name suggests, is used to list all the open files in linux. These files may be network sockets, disk files or devices opened by different processes. Use the lsof command along with the -nP options to list all open sockets.

How do I find my Apache port number?

By default, the Apache webserver is instructed to listen and bind on port 80.0 for incoming connections. If you opt for a TLS setup, the server listens on port 443 for stable connections.

Why is port 4444 used?

Port 4444, Transfer Control Protocol: Some rootkits, backdoors, and Trojans open and use port 4444. It uses this port to eavesdrop on traffic and communications, for its communications, and to receive data from the compromised computer.

How do I use port 8080?

What is port number 8080 used for? Port number 8080 is usually used for web servers. When a port number is added to the end of the domain name, it drives traffic to the web server. However, users can not reserve port 8080 for secondary web servers.

How do I check if port 8080 is open Ubuntu?

Type “netstat -a -n -o | find "8080"". A list of processes using port 8080 is displayed.

Is port 8080 a port 80?

Port 80 is the default port. It's what gets used when no port is specified. 8080 is Tomcat's default port so as not to interfere with any other web server that may be running. If you are going to run Tomcat as your web server, the port can be changed to 80 so that visitors do not need to specify it.