udp – Page 2 – POFTUT

How To Solve “DNS Server not responding”

DNS is one of the most important protocols for internet and network usage. If DNS wouldn’t exist you will have to type to your browser in order to access this web site. But some times even have an internet connection we may have some access errors related to DNS. In this tutorial, we will look … Read more

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 netstat -l options in order to list … Read more

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 parameter for a port scan … Read more

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 remote system nmap will scan. … Read more

TCP and UDP Port List, Names and Usage Frequency

TCP and UDP Port List, Names and Usage Frequency

Nmap tool provides a popular ports list as a database where this list is also used in network and service scans. Here is the list but before we will look at the command which will list ports according to the popularity. Nmap Top Ports Listing We can use sort command in order to list ports according … Read more

Nmap Port Scan (TCP , UDP , ACK, SYNC,…)

[rps-include post=6632] This chapter is real part of the scanning. In this chapter we will look how to define port scanning parameters. The techniques described in this chapter generally requires privileged user which means root or Administrator user. Tcp Syn Scan This scan is default and most popular scan. This scan is also referred half … Read more

Linux Lsof Command Tutorial With Examples

Lsof is linux command used for output files and processes related information. lsof support different type of file formats like regular file, directory, block special file etc. lsof provides given command output parsable format where other tools like cut can be used to filter output. In this tutorial we will look different use cases of lsof command. In order … Read more

Introduction To Nmap Network Scanning

[rps-include post=6632] Nmap is very popular tool among network and system administrators and pen-testers. As a pentester I generally start a penetration test with nmap. Nmap simply uses network protocols to scan given network range with given options. We will look all of the common options in next tutorials. Info Nmap is shorthand of the … Read more

Windows Netstat Command Tutorial

Windows Netstat Command Tutorial with Examples To List Network Ports and Connections

Netstat is used to display active TCP connections and related listening ports in the computer or system. Actually, there are more features provided by netstat like display statistics about network stack protocols, IPv4, IPv6, TCP, UDP, etc. netstat Command Syntax The syntax of the netstat command is like below. Simply we can use the following … Read more