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...
Tagged: udp
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...
What Is DNS Server Or Protocol Port Number?
Domain Name System aka DNS is used to match domain names to the IP addresses. DNS is provided over intranet and internet servers with different port numbers. TCP or UDP DNS can use both transmission...
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...
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...
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...
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...
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...
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...
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...
