#CYBERSECURITY #LEARN360 #LEARNCYBERSECURITY
LEARN OSI MODEL AND IMPORTANCE OF OSI MODEL IN NETWORKING
If you want to Read More In Detail About it :- https://www.jewkoiyie.com/learn360-osi-model/
-> OSI stands for Open System Interconnection, which was published in 1984 by ISO (International Organization for Standardization).
-> It is a reference model that describes how information from software applications in a computer travels from one physical medium to software applications in another computer. OSI has seven layers, and each layer performs a specific network function.
It Contain 7 Layer in OSI Model :-
7. Physical Layer
6. Data Link Layer
5. Network Layer
4. Transport Layer
3. Session Layer
2. Presentation Layer
1. Application Layer

COMPUTER NETWORKING | LEARN360
What is TCP/IP And UDP and Why TCP/IP and UDP
TCP stands for Transmission Control Protocol which works in the transport layer of both the models. TCP protocol is used in transferring data or packet from source to destination and this protocol is connection oriented.

Three way Handshake :-
Three way handshake is nothing but the process of establish a connection between two devices before transmitting the data. So, now let’s see the process.

UDP Protocol :-
UDP stands for User Datagram Protocol , it is a connectionless protocol , this protocol doesn’t care whether packet is reached or not to the destination but TCP protocol does.
Read my Full Article to read about it in detail :-
https://www.jewkoiyie.com/learn360-computer-network-tcp.../

COMPUTER NETWORKING | LEARN360

Computer Networking – What is Network Security and Devices used in iT.

Network Security :-
Network security is basically used to protect our computer from Unsecure IPs or from Attacker that wants to take over our access, and In Todays world Network Security is very important for all of us. You should know what services is running on your machine so that you will get to aware from remote access shells, trojans, viruses and etc...

Firewall :-
So, Firewall is nothing but a software or you can say hardware networking device which monitors the traffic and block the suspicious or malicious traffic between internal private network and the outside internet.
Types of Firewall :-
1. Host Based Firewall.
2. Network Based Firewall.
3. Next Generation Firewall.

If you really like this post So, please go threw my full post link here:-
https://www.jewkoiyie.com/learn360-what-is-network.../

Critical Samba flaw presents code execution threat
Urgent patching of file-sharing technology urged

A newly discovered critical vulnerability in Samba could allow remote attackers to execute arbitrary code as root on affected installations.Face with monocleFace with monocleFace with monocleFace with monocle

COMPUTER NETWORKING | LEARN360
Computer Network – What is Domain Name System ( DNS ).
Domain Name Server :-

DNS stands for Domain Name System, as it is basically used to access resources from the server. As we know every devices is connected to the internet and every device has IPv4 or IPv6 address, similarly server also has IP address again n again, as IP addresses are numbers and numbers are not easy to remember, that's why Domain Name System is introduced which is readable and easy to remember for humans.

Working of DNS :-

1. When we enter any web address like example.com in our browser then our computer firsts checks its local cache if we have visited that particular website recently, if visited then fine if not then a request to the Recursive DNS Server or DNS Resolver is made.

2. ipconfig /displaydns will show you DNS details in windows.

3. The recursive server then queries a DNS root server (.).

4. If we find result at root server then process ends up here.
If we don’t get results here then root server send that particular request to the TLD server who is handing that particular TLD, in
this case it is .com.

5. The TLD server then responds with the IP address of the domain’s name server, example.com .

6. Lastly recursive DNS server sends request to the authoritative nameserver of example.com.

7. Then IP address is returned to recursive DNS server from the authoritative name server.

8. Recursive DNS Server then responds to the web browser with the IP address of the domain requested initially.

Read my full Article By Given Link :-

https://www.jewkoiyie.com/computer-network-what-is-domain-name-system-dns/

COMPUTER NETWORKING | LEARN360
Computer Networking – Internet Security Controls

All about internet Security ??
Network security controls are used to ensure the confidentiality, integrity and availability of network services.

Content Encoding ??
DNS Encoding is the process of converting the data or a given sequence of characters, symbols, alphabets etc., into a specified format, for the secured transmission of data.

Why Padding ?
In Base64 encoding, the length of an input String must be a multiple of three. If not then encoder adds one or two padding characters 😊) at the end of the output as needed in order to meet this requirement. Upon decoding, the decoder discards these extra padding characters.

Check Out
Please check out my full detailed Article on this topic by given below link :-
https://www.jewkoiyie.com/learn360-internet-security-controls/

INFORMATION GATHERING | PENETRATION TESTING
Penetration Testing : Setting Up BurpSuite Proxy Environment For Penetration testing

What Penteration Testing Is ?
Penetration Testing is the process of finding vulnerabilities or weakness in the web application or the computer system with permission of owner or in other words we can say , finding vulnerabilities ethically not unethically. It basically means we should have prior permission of resource person to test any web application or system.

Setting up proxy ??
we’ll set up proxy with firefox. Here question will come in mind ,

What is Proxy ?
Proxy is nothing but a software or program that sits between client and server , similar to VPN. All the traffic from client to server goes through proxy and from server to client goes through proxy.

We’ll use BURP Proxy to intercept the request and response and we’ll do setup for it :

1. First install foxy proxy extension in your firefox in linux

2. FoxyProxy : options page will open then click on add on top left.
Now enter the following details as shown below in fig.
Now click on save.

3. Now to open burpsuite , click on top left icon of kali linux and then search for burpsuite.

4. Burpsuite: Burpsuite is very powerful automated tool and also it can be used manually , mostly for web application testing. It comes in two versions one is community version and other is paid version. We get community version as pre installed in linux. To use paid version you’ll need to buy it.

5. Now we have configured firefox , now we’ll set up burp.

6. After clicking on Burp Suite, click Next, then Start Burp. You should see a window as shown in below fig.

This Post becoming so lengthy in Reading here ->
Check Out Complete Article ( with Pictures by Step By Step ) if Are Really Setting Proxy with your Burp Suiteite :
https://www.jewkoiyie.com/penetration-testing-setting-up-burpsuite-proxy-environment-for-penetration-testing/

INFORMATION GATHERING | PENETRATION TESTING
Web Reconnaissance Or Information Gathering – Part 1

WHAT'S INFORMATION GATHERING IS ?
Information gathering is the first phase of penetration testing in which we collect publicly available information or internal information about target while performing active reconnaissance as well as passive reconnaissance which we can use it our further testing phases.

Target: Our target is nothing but web application on which we’ll perform testing.

Active Reconnaissance: It means whenever we engage with target to get information is called active reconnaissance.

Passive Reconnaissance: It means when we collect publicly available information about target without engaging with target is known as passive reconnaissance.

Vulnerability: Vulnerability is nothing but the weakness or lack of security which we found in the target.

In this blog we have talked about How to gather information about your target like - Active Reconnaissance, Passive Reconnaissance and about Google Dork

To Read Full Article And take Practical Knowledge From Given Link Below :
https://www.jewkoiyie.com/web-reconnaissance-or-information-gathering-part-1/

INFORMATION GATHERING | PENETRATION TESTING
Web Reconnaissance Or Information Gathering — Part 2 ( Whois Lookup, tools, site)

SSL Certificate Parsing
SSL Certificate Parsing is another way to find different domain names related to the target. But before that what SSL certificate is, SSL stands for Secure Socket Layer, it is used to encrypt web traffic, because of SSL we see HTTPS in the url field instead of HTTP in maximum websites.

Subdomain Enumeration
Subdomain enumeration is the process of finding subdomains of a target.

What is Whois Lookup?
Whois is a widely used Internet record listing that identifies who owns a domain and how to get in contact with them. The Internet Corporation for Assigned Names and Numbers (ICANN) regulates domain name registration and ownership.

Take a look To my Article on This :-
https://jewkoiyie.com/web-reconnaissance-or-information-gathering-part-2-whois-lookup-tools-site/

Each OSI layers and
Which type of attack can perform on that layer