Today Firewall is depicted as the main component of the security and networks. Firewalls provide a lot of different operations and features. In the old days, the firewall was simply used to block or allow some ports and management of the NAT. In these days there are a lot of different threats where the firewall is used to detect and stop these threats. Firewall Features Today modern firewall’s provides a...
IP addresses are the core mechanism of the Computer networks. The IP address is used to specify the host to communicate and transmit data. There is two type of IP address configuration mechanism. Dynamic and Static. In this tutorial, we will examine the static IP address configuration. Static IP Address Static means stable or not changeable, fixed etc. Static IP addresses set to the host or interface and do not change during...
Google is a huge company which provides paid and free services. It mainly operates in IT and internet area. Internet uses DNS in order to solve domain names into IP addresses. Because internet infrastructure works with IP addresses. Google provides free DNS servers which can be used for fast and free domain resolution. In this tutorial we will learn Google DNS features and how to use in Linux, Ubuntu, Debian,...
DNS is used to translate between a human-readable name like poftut.com and IP address like 45.79.1333.118. DNS can use both UDP and TCP protocols but generally, UDP protocol is preferred. In this tutorial, we will learn how to flush, clear the DNS cache with ipconfig /flushdns command. This tutorial can be applied to the All Windows Operating system versions like Windows XP, Windows 7, Windows 8, Windows 10, Windows Server...
Internet and most of the network infrastructures uses IP Protocol. IP protocol uses IP addresses in order to connect different hosts and networks over globe. Classless Inter Domain Routing or CIDR is hierarchical IP addressing scheme used to set IP addresses to the hosts and network. Here we will learn how to calculate IP address, Network Address, Broadcast Address, Network Mask and provide these as cheat sheet. IP address, Network...
TTL is the short code for Time To Live. TTL is located in IP packets where it is used to hold the count of intermediate hops. TTL is value is set by source host. Windows operating system set it to 64 where Linux operating systems set to 128. Every router or intermediate host the packet pass will decrease the TTL value of the IP packet. TTL generally used with different...
Linux provides different philosophy and use cases from system point of view. socat is very interesting command which provides us the ability to redirect input and outputs from different type of system resources like network, file, command, socket etc. Install For Debian, Ubuntu, Mint and Kali socat can be install dpkg based distributions like below by using apt command.
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$ sudo apt install socat -y |
Install For Fedora, CentOS, RHEL We can install for Fedora,...
Computer networking provides a lot of features for remote usage. But remote access may have some problems. Computer networks provides some basic tools in order to check and detect these problems. In this tutorial we will look some basic ping test in order to check network status. ICMP Internet Control Message Protocol is a network protocol designed to communicate between network hosts about network status. Ping test mostly uses ICMP...
Windows operating system provide ipconfig command for network related administration like show ip address, request IP address from DHCP set IP address etc. In this tutorial we will look how can we release and renew IP address. For more information about ipconfig command read following tutorial. Windows Ipconfig Command Tutorial With Examples To List, Change, Renew IP Configuration Open Command Prompt We can open command prompt in different ways. The easiest way...
Internet started long days ago. But in the first years it was not popular as today. From technical perspective there are some difficulties which prevents the expansion of the internet. There was a lot of protocols those are incompatible each other and the TCP and IP protocols are standardized. TCP/IP Model fits very well with OSI Reference Model. OSI Model has been very influential the design of the TCP/IP Model....
