Whether it is a Windows PC, Cisco router, switches, Linux machine or network enable device, it is recommended to stop unnecessary services that are run by default. Every running, but unused, service on your system maybe a possible means of attack.
Users may not even be aware that many of these services are running.
It is [...]
In my previous post on testing of open port in a server, we have learned that telnet command can be used in confirming if a port is open in a server.
However, even though a port is already opens in a server, it will show as not open in this testing.
In our previous post on How to test if a port is open on a server or PC, we have indicated that in TCP/IP networking, port 25 is used in SMTP (Simple Mail Transfer Protocol), port 110 is for POP3 (Post Office Protocol) and so on.
Anyway, where can a user find the port [...]
Further info to my previous post on How to access web page without using web browser, you may use the same method to confirm if a network service is running on a server or computer.
For example if you like to test if pop3 is running on a computer PC1, you may execute the following [...]
In networking, sometime while performing network trouble shooting, you may like to quickly test if the connection to a website is available. Without using a web browser, you also can use the telnet command that is available in most of the login terminal like Command prompt, unix login shell or Cisco login terminal.
To test a [...]