The firewall is the security defender of Windows operating systems. When enabled, the firewall blocks any unwanted websites or advertisements that can harm your computer system in any way. Usually, Windows Firewall has a predefined set of rules according to which it allows or restricts access to certain programs. However, you can also create your ... Read more
No one can send ping requests to your system to know whether it is alive or not when the Firewall is enabled on your Windows 10 computer system. You can enable ping by disabling the Firewall but this can prove to be very disastrous, as your PC will be exposed to external threats and malware. ... Read more
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 the installation of IPTables on Centos 7.x The first step is to stop and mask ... Read more
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 ports. TCP ports 20 - FTP Data 21 - FTP Command 22 - SSH 25 ... Read more
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 main menu and - type Firewall. - Click on Settings on the right pane ... Read more
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 don't get blocked. The following example is for pure-ftpd on Debian or Ubuntu Linux and ISPConfig 3. Set Passive Port Range ... Read more