IP Scanning

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IP Scanning

What is an IP Address?

An IP address is a series of 4 nodes. Each node is a number ranging between 1 & 254 separated with a dot "." Each server or box connected to the internet is assigned a wide area network, WAN IP address that identifies that system. Some IP addresses are static, which means they never change, while most change every few days or every time the user connects to the internet.
Example: 22.185.241.67

What is an IP Scanner?

An IP Scanner is a program that attempts to get a response from every WAN IP address between a range you designate by sending out tiny packets. When the program returns the results, it will have compiled a list of all the active servers between that range.

When to IP Scan

An IP Scan is usually one of the first things you do unless you already know your target remote server WAN IP address. If all you have is a server name then it would be more useful to run a whois scan.

Using the IP scanner

  1. Install an IP scanner
  2. Connect to the Internet
  3. Know your Search Range
    Pick a starting and ending WAN IP address to be entered as parameters for the scan. Two examples of WAN IP addresses are 24.131.102.175 & 26.12.250.65. Make sure that the ending address is greater than the starting. In addition, do not separate the first nodes greatly, otherwise it will take the scanner longer to process.
  4. Issuing the Command
    You will be able to utilize the program via your console terminal. The instructional command to run the IP scanner is ipscan:[StartingIP],[Ending IP] or ipscan:24.131.102.175,26.12.250.65
  5. Waiting for Scan Results
    Depending on what type of internet connection your notebook supports, you may have to wait longer for scan results. It will also take longer if you increase the separation of the starting and ending address parameters.
  6. Selecting a Target & Using the Port Scanner
    After the IP scan has completed, with any luck there will be a listing of active systems and their IP addresses. Choose one of the WAN IP addresses and then continue with a Port Scan.