Tagged: udp

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What Is A Firewall and How Its Work?

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...

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How To Flush DNS and Reset TCP/IP with ipconfig /flushdns Command In Windows

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...

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What Is Linux, Unix Socket?

Socket is a mechanism which provides connection between two process or system by using network stacks. In a more clear way we can use sockets communicate and transfer data between two system. As we know Unix and Linux systems works on file logic. Everything in operating system is file where network...

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How To Scan All TCP and UDP Ports with Nmap?

Nmap is very useful and popular tool used to scan ports. Nmap by default scans most popular 1000 ports. We may need to change the port range and protocol type to all while scanning with nmap. Scan All TCP Ports with Range We can specify the port range with the...

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How To Solve “Dns Server not responding”

DNS is the one of the most importnt protocol for internet and network usage. If DNS woluldn’t be exist you will have to type https://45.79.133.118 to your browser in order to access this web site. But some times evenwe have internet connection we may have some access errors related to DNS....

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How To Check and List Listening Ports with Netstat In Linux

netstat is very useful tool which provides a lot of information about the network of operating system. netstat command can list ip addreass, route, port, connections etc. More detailed information about the netstat command can be found in the following tutorial. Linux Netstat Command With Examples List All Listening Ports We can use...

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How To Scan TCP and UDP Ports With Nmap?

Nmap is very popular tool among pentester and system/network administrators. We have all ready provided different nmap tutorials and cheat sheet but TCP and UDP port scan is important part of the scan. We will dive in detail in this tutorial. Start Port Scan The most simple usage without any...

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Nmap Commands Cheat Sheet

Nmap is the most popular tools used in penetrations test or assessments for network scanning. Nmap have another features like listing some basic vulnerabilities and protocol related details. We will look Nmap features in fast way. For more detailed information read following tutorial. Nmap Tutorial Target Selection Target is the...

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