tcp – POFTUT

Tagged: tcp

What Is Packet Sniffing with List Of Packet Sniffers? 0

Blog / CCNA / CCNP / Linux / Linux / Linux / Network / Network / Pentest / Routing / Security / Security / Switching / System / Virtualization / Windows / Windows / Wireless

What Is Packet Sniffing with List Of Packet Sniffers?

Packet Sniffing is the process to capture packets. Generally, computer network packets are sniffed. Packet sniffing may seem very simple but in reality, it provides a lot of complexity related to the protocols, network mediums, etc. Packet Capture or Packet Sniffing Before starting to learn what is packet sniffing we have to learn the difference between packet capture or packet sniffing. Well, actually there is no difference between packet capture...

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27001 / Application / Blog / CCNA / CCNP / CISSP / Linux / Management / Network / Network / Pentest / Routing / Security / Security / Switching / System

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 different threats where the firewall is used to detect and stop these threats. Firewall Features Today modern firewall’s provides a...

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Blog / CCNA / CCNP / Linux / Linux / Network / Routing / Windows / Windows

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 client which is located LAN. Topology NAT has the following topology in general. NAT will occur on the...

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Blog / CCNA / CCNP / Linux / Linux / Management / Network / Windows / Windows

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 protocols TCP and UDP. But general usage is over UDP protocol because of its simplicity and speed. TCP Port 53 One of the used DNS port is TCP Port 53. TCP provides stability over DNS...

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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 be applied to the All Windows Operating system versions like Windows XP, Windows 7, Windows 8, Windows 10, Windows Server...

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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 connections are files too. Use Cases Sockets can be used in different cases. We can use socket to transfer data...

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Blog / CentOS / Debian / Fedora / Kali / Linux / Linux / Mint / RedHat / Security / Ubuntu

Linux Ssh Tunneling or Port Forwarding Local and Remote Ports with Examples?

Ssh protocol secure remote connections which is shell or terminal based to the remote systems. Ssh protocol and tool provides more than that. We can use ssh to create tunnels over local and remote systems or connect remote system X server. In this tutorial we will look how to tunnel and port forward locally and remotely. Local Port Forwarding – Forward or Tunnel Local System Port To Remote System Port Local...

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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 -p option. As we know TCP port numbers are between 0 and 65535  . We will use -p0-65535 as option in order to...

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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. In this tutorial we will look different causes and solutions about Dns Server not responding . We have all ready  provided...

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Blog / CCNA / CCNP / Network / Routing

What is IP Address (Internet Protocol Address)?

In computer networks we need to give each host or system a unique number and/or name. This is the only way to make communication possible. In other ways there will be a lot of problems like collusion or miss interpretation. Most of the system uses IP addresses to communication over computer or IT networks. In this tutorial we will try to answer the question “What is IP address?” and details...

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