Linux, Windows, Security, Programming, Network Tutorials
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
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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
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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
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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
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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
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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.
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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
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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
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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.
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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
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