Ethical Hacking free courses: Episode 03; IP Address Details!

Ethical Hacking free courses: Episode 03; IP Address Details!

Ethical Hacking Free Course episodes are released a little faster, I know everyone's faces brighten happily! And believe me friends, I want to see you so happy and satisfied! I said in episode 2, in the next episode I will appear not only with the basics, but also with some advanced topics, so I appeared. Those who are reading this episode first must have missed two more great episodes from the previous one, which  you can  find here In the last episode I discussed the basics of networking and gave a lot of ideas about IP addresses. I dedicated this episode only to IP addresses, because it is a very important term in the field of networking.

This course contains everything;

1. How do I find my IP address?
2. How do I change the IP address?
3. How do I find any website IP?
4. How do I find the sender's IP address by email?
5. Is it really possible to find geolocation from an IP address?
6. Details about 127.0.0.1 IP address!
7. What is Dynamic Host Configuration Protocol?
8. How do I find a MAC address using an IP address?
9. What is forward and reverse IP and DNS lookup?

So you have to understand, how wonderful and premium Ethical Hacking Free Course Episode 3 has been arranged with all the information! Now just sit back and enjoy the course carefully!

Find your own IP address!

Your computer is connected to the Internet or any external network, which means two IP addresses  come together here  . A public or external IP address, provided by your ISP, and another private IP address or local IP address. As I made clear in the previous episode,  you must be connected to a public IP to get an internet connection, to visit any website or to stream online  videos . You can access file sharing, printing, port forwarding, or your router settings on the local network using a private IP.

So if you say, finding your own IP address there must first mean public IP, which you can call your Internet IPO. On the home network, only your router has a public IP address, while the rest of the connected devices are connected to the router's private IP. However, finding any public IP address is much easier. There are many websites on the Internet that help you find your public IP address. Just open the sites mentioned in the list below, you will see your public IP address as soon as you open the page. The easiest way is to go to Google and search by typing "What is my ip"!

1. WhatIsMyIPAddress.com
2. IP Chicken
3. WhatIsMyIP.com
4. IP-Lookup

But yes, if you are using a VPN, these websites will not be able to display your real internet IP, but the VPN server IP. If you use any proxy server, that IP will be displayed. Now the question is how to find the local IP or private IP?

You see, in all modern versions of Windows, the "ipconfig" utility is already included in the command prompt. Just open your Windows CMD. To open CMD, hold down the Windows key and press "R", this will open the run. Now go to the empty cell of the run and type “cmd” and press enter from the keyboard, the diameter command prompt will open. Now enter the command, "ipconfig", you will see all the IP addresses and network hardware will show the details. If you have connected to the Internet using WiFi, of course your local IP will be shown from the “Wireless LAN adapter Wi-Fi” selection. And if you use Ethernet, then "Ethernet adapter Local Area Connection." Your local IP will be displayed in the section. The local IP view can be anything from 192.168.0.0 to 192.168.255.255.

Change IP address

There are a number of reasons why it may be necessary to change the IP address. Many choose to change their public IP or Internet IP to unblock websites, bypass country restrictions, or watch any video. There are two types of IPs that can be changed, public and private, and they have different advantages. In this episode we will not discuss about changing the IP from the router, here we will discuss how to change your internet IP address. However, I am clearly saying here, refrain from the intention to do any evil by changing the IP. No matter what IP you change, you can be found when you commit a crime. And since we are learning ethical hacking, we must first make our minds honest.

Public IP reveals the identity of your local network and your computer or any device in front of the Internet. If the public IP is changed, your location, country is hidden. You can change the public IP address using a VPN or virtual private network client. No VPN client software needs to be installed on your system that will create a tunnel between your computer and the VPN server. Any Internet request will then become a VPN server without your ISP going through the computer and this transmission is completely encrypted, so your ISP will never be able to tell you what you are doing on the Internet or what website you are visiting. Since you are connected to a VPN server and using the Internet, and that server is located in another country, your public IP address will also be virtually changed to another country.

There are many VPN service providers who offer free and paid services. If you want to test you can try free VPN, but for permanent use, of course I will ask you to take paid service. It is necessary to get service from a VPN provider who does not save the log. However, it is possible to trace VPNO.

It is possible to hide entire computer or entire network traffic using VPN. If you only need to unblock a specific two websites, you can use a web proxy. If you go to Google and just type "web proxy" and search, you will find many websites from which you can visit other sites, so your IP address  will not reach the visited  web server . IP can also be hidden using a manual proxy, but in this case the real IP is leaked, so the best method is to use a VPN. Many ISPs use dynamic IP addresses, meaning your IP will change as soon as you disconnect and connect to the Internet. Mobile operators in particular use dynamic IP.

Website IP Bay out to  be

Any website in the world must have at least 1 IP address. There are many benefits to knowing the IP address of a website, you can bypass if the website is blocked, you can block any website if you are a network admin, you can get an idea of ​​where the website's server is located, and much more.

When entering a domain name into your web browser, of course your browser first finds the IP address, then the website is loaded, but this process is delayed, so the IP information is not displayed in the browser. Again, large websites use multiple IP addresses at once, loading sites from different IPs using the same domain from different parts of the world.

You can easily find the IP address of any site using the ping command. Just enter the command using CMD from Windows computer, “ping sobuzbanglatv.blogspot.com” (you can enter the name of any site) then hit “Pinging sobuzbanglatv.blogspot.com [104.18.41.164] with 32 bytes of data” domain. The IP address will be out. If you want to do this from a mobile device, there are many apps in Google Play and App Store that you can use to ping the website and find the IP . If you don't want to get in trouble, just   go to this link and enter the domain name, you will get the IP address.

IP addresses from email sendarera Bay to  be

In the case of hacking, you may need this many times, the IP address of the person in front may be necessary. In that case, how to find someone's IP? Fortunately, emails are designed in such a way that the IP address of the computer from which the email is sent is associated with the mail message. The sender's IP address is found in its header during mail delivery. Nowadays, no one pays attention to the mail header, because modern mail clients hide the mail header.

If you use Gmail, open the mail whose header you want to check. Now click on the “Down Arrow Key” next to this icon at the top right , a menu will open, click on “ Show original”  from the menu , the mail header will open as below. But Google removes the sender's IP address from the Gmail header, only the Google server IP is added, in which case it is impossible to find the IP address.

Microsoft sends an extended header to the Hotmail service called "X-Originating-IP" to find the sender's real IP, in the Yahoo Mail header IP addresses to be .

IP location

It is not possible to find the exact geographic location from the IP address. Especially if you use mobile internet, you are given a dynamic IP address, which changes every time you disconnect / connect. However, the geo location of your ISP can be found from the IP address, but it is not 100% accurate. In foreign countries, IP addresses are registered in the names of many people, their mobile numbers or more important information in the database,  you can check them  from this site .

However, even if the exact location of the user is not available, this information can be obtained from any user country or connected to an ISP. However, the exact idea of ​​the city is not available, IP Geo location tools can only detect the ISP's server location, now if the ISP is much larger, it is difficult to determine which city the user is. If you use Grameenphone Mobile Internet from Rajshahi, your IP location will show Dhaka. From the iplocation.net  site you can get the information of any IP address ISP or any company registered in the name!

127.0.0.1 Local Host

127.0.0.1 An IP version 4 IP address, called a local host. Each computer claims this address as its home, but this address cannot be used to communicate with other computers. Your computer may have received an IP address of 192.168.1.15 থেকে from the router, using which the computer communicates with everything on the local area network, but the computer still claims 127.0.0.1 as "This Computer".

It can also be called a loopback IP address. Suppose you have made your own computer a web server, in this case you can load the pages in the browser using the local host IP address. When the 127.0.0.1 IP address is entered into the browser, the browser will search the page on your computer without finding the page in the network. Because this is the home address! If a local host request is made from your computer, it will be limited to the computer, and the request will never go to the local area network or the Internet.

DHCP

DHCP's full name is Dynamic Host Configuration Protocol. It is a protocol that manages fast, automated, and central IP address distribution across networks. In fact, your router acts as a DHCP server, which automatically assigns unique IP addresses to all devices, and this process is complete. 

Becomes automatic.

When a device is turned on and requests to connect to the router, it is called a DHCPDISCOVER request. In this case the device requests a new IP address from the router to connect. After the Discover Request Packet reaches the DHCP server, the server generates an IP address that can be connected using the device. After receiving the IP from the server, the device sends the DHCPREQUEST packet again to work on the network. If the server sees that the IP address is correct and the connection can be provided, a yes-based response.

These requests are processed very quickly, so the user does not need to understand anything about them later. DHCP uses dynamic IP style, so no two devices of the same IP will ever be created on the same local network, and it is completely automatic.

Find MAC address

In TCP / IP computer networks, IP address and MAC address are used together. Where IP addresses are virtual addresses that may change frequently on the network, but MAC addresses become permanent addresses, which never change. MAC addresses usually vary according to the network interface. For example, if your laptop has Bluetooth, WiFi, and Ethernet, then your laptop will have 3 MAC addresses. If you use two WiFi adapters together, there will be separate MAC addresses for the two WiFi.

There are many important reasons why you may need to know the device MAC address. Suppose if you filter the MAC address on the network, then only certain devices can be connected to the router, there is no benefit in knowing the password, the router will not allow other devices. Moreover, you can find out about the device manufacturer from the MAC address.

For now, if a device cannot be physically accessible, it will not be possible to get its MAC address. IP address and MAC address are two different things. However, if your computer is connected to the same local network, then you can get the MAC address of the local network device. You need to open the command prompt and give the command “ping 192.168.45.15” Here you have to enter the IP of the device you want to see on Mac. If the device receives a ping, you will see the following response.

Pinging 192.168.86.45 with 32 bytes of data:
Reply from 192.168.45.15: bytes = 32 time = 290ms TTL = 128
Reply from 192.168.45.15: bytes = 32 time = 3ms TTL = 128
Reply from 192.168.45.15: bytes = 32 time = 176ms TTL = 128
Reply from 192.168.45.15: bytes = 32 time = 3ms TTL = 128

Now enter the “arp -a” command in the same command session, you will see the MAC address of the pinged device. The response will be received as below!

 Interface: 192.168.45.15 --- 0x3
 Internet Address Physical Address Type
 192.168.45.1 70-3a-cb-14-11-7a dynamic
 192.168.45.15 98-90-96-B9-9D-61 dynamic
 192.168.45.255 ff-ff-ff-ff-ff-ff static
 224.0.0.22 01-00-5e-00-00-16 static
 224.0.0.251 01-00-5e-00-00-fb static

However, using this method, it will not be possible to view the device Mac through the Internet, only it will work on the local network. This MAC address actually shows up from the cache and you see it using the address resolution protocol. I will discuss MAC addresses in more detail in the next episode, the way I am covering the IP address in this episode!

IP address forward and reverse lookup

IP lookup refers to the process by which an IP address is translated from an Internet domain name. Forward IP lookup refers to the process of converting a domain name to an IP address and reverse IP lookup refers to the process of backing up a domain from an IP address. These are the terms you must keep in mind in the next advanced course but I will not repeat them.

There are many internet services that support both IP lookup and reverse lookup. Data is taken from the DNS server for IP lookup, there is also a database for reverse lookup. Of course, every domain name needs a forward lookup to connect to that web server. But if you want to know how many websites there are in that IP address, then you have to check the reverse IP lookup. You  can check how many more websites are hosted on that server IP using this  online reverse lookup tool.

In this episode, along with the basic things, I have also taught you many advanced terms. There may be another episode about IP addresses, where I will discuss different ranges of IPs in detail, but for now I am not publishing such a post to bore you! In the next episode, I will definitely go to the more technical side. Don't worry, I'll give you everything I know. So stay tuned, and the next episode is coming soon. Be sure to comment below on any question, if you want to multiply, please comment first !! But don't forget to let us know what the third episode looked like! So many thanks so far today for reading this post to the end.

Hope everybody on this site also had a great day.  Stay  well, stay healthy, stay safe with Sobuz  Bangla  TV . Thanks. God bless you.  

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