iptables – POFTUT

What Is NAT (Network Address Translation) and How It Works?

Network Address Translation a.k.a. NAT is a process or technique used to change IP address and TCP port numbers by an intermediate device like firewall, router, modem, etc. There are different use cases for NAT but the most popular one is to use a single WAN IP address for multiple servers and clients which is … Read more

How To Save and Restore Iptables Rules Permanently In Ubuntu, CentOS, Fedora, Debian, Kali, Mint?

Iptables is standard and popular firewall provides by Linux distributions like Ubuntu, CentOS, Fedora, Debian etc. Iptables rules are managed in run time where a lot of rules are added, changed and remove. These changes are temporary changes where only running configuration is changed but do not saved temporarily. In this tutorial we will look … Read more

How To Start, Stop and Enable, Disable Iptables or Ufw In Ubuntu, Debian, Kali, Mint

Ubuntu is popular Linux distribution used in different enterprise or personal IT environment. Security is important part of the today IT. We can use firewall services like iptables in order to tighten security of our Ubuntu system. In this tutorial we will look how to install, remove, enable, disable, start and stop Ubuntu iptables. This tutorial … Read more

How To Enable BitTorrent Ports In Linux Firewall?

BitTorrent is a distributed file-sharing protocol. There is a lot of different type of applications using the BitTorrent protocol. There is a lot of advantages to using BitTorrent from different points. It saves and balances global download traffic. Accelerates client-side download speed. But some times there are port-related problems that blocks or slow down the … Read more