Whenever Firewall is enabled on your computer system, no one can send ping requests to your system to know whether it is alive or not. You can stop this from happening by disabling the Firewall but this can prove to
Centos 7 replaced the traditional IPTables Linux Kernel Firewall with the Firewalld service. There are still a lot of scripts available that require the use of IPTables. A common example is the software Fail2ban. In this guide, I will explain
Here is a list of ports that are used commonly on ISPConfig 3 servers. If you don't have all services installed or if you e.g. don't want to connect to MySQL from external servers, then close the unused or unwanted
If you have some peculiar program installed that you need to have but want all its internet communication blocked you can do that easily with Windows' built in firewall. On Windows 8 just hit the Windows key to get to
The Windows 7 Firewall allows separate configurations by network. This feature makes it possible to configure different firewall rules for the home network , the networkwork or a public network and Windows will apply these rules automatically when the computer
If you run a firewall on your Linux server and want to use passive FTP connections, you have to define the passive port range in pure-ftpd and your firewall to ensure that the connections dont get blocked. The following example