netwyman

Linux Firewall Tools The Linux kernel is part of every Linux distribution. This also includes a Linux firewall called   netfilter . You can control the Linux Firewall with the Command Line Utility   iptables . Debian-based distributions like Ubuntu or Knoppix have no predefined rules during the installation, so everything is allowed by default. With Enterprise Linux distributions such as Fedora, CentOS or RedHat, use ports have to be opened manually. The configuration of the Linux firewall can be adapted to your needs using   iptables . However, the syntax and handling of   iptables   is relatively complex, so there are several tools / scripts to configure   iptables . We will introduce you to a small selection here. Tools for the command line to configure your Linux firewall Arno’s Firewall   – Secure firewall for single and multi-homed systems. Very easy to configure, handy to manage and highly customizable. Ferm   –...

What is netstat? Netstat — derived from the words network and statistics — is a program that’s controlled via commands issued in the command line. It delivers basic statistics on all network activities and informs users on which portsand addresses the corresponding connections (TCP, UDP) are running and which ports are open for tasks. In 1983, netstat was first implemented into the Unix derivative BSD (Berkley Software Distribution), whose version 4.2 supported the first internet protocol family, TCP/IP. netstat has been integrated into Linux since its debut in 1991 and has been present in Windows since the appearance of version 3.11 (1993), which could also communicate via TCP/IP with the help of extensions. While the parameters of netstat’s commands (as well as their outputs) differ from system to system, when it comes to their functions, the various implementations are very similar. netstat is a command line program and for this reason doesn’t feature a graphical use...