Tag: tcp

What Is DNS Server Or Protocol Port Number?

Posted on 20/12/201817/12/2018 by İsmail Baydan

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

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

Posted on 24/10/201824/10/2018 by İsmail Baydan

DNS is used to translate between 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

What Is Linux, Unix Socket?

Posted on 01/04/201801/04/2018 by İsmail Baydan

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

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

Posted on 17/09/201712/08/2018 by İsmail Baydan

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

How To Scan All TCP and UDP Ports with Nmap?

Posted on 06/09/201706/09/2017 by İsmail Baydan

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

How To Solve “Dns Server not responding”

Posted on 20/08/2017 by İsmail Baydan

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

What is IP Address (Internet Protocol Address)?

Posted on 18/08/201718/08/2017 by İsmail Baydan

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

How To Check and List Listening Ports with Netstat In Linux

Posted on 18/08/2017 by İsmail Baydan

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

How To Scan TCP and UDP Ports With Nmap?

Posted on 10/08/201710/08/2017 by İsmail Baydan

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

Nmap Commands Cheat Sheet