Well I’m posting this after a long gap. I was busy with my work and also I have joined college for post graduation. But I don’t want to keep this blog outdated and I will try to update it whenever I find interesting sites. Today I saw a site called Nmap Online. I hope everyone know about Nmap, a multipurpose port scanner and extensively used network tool by hackers as well as security professional. Nmap online is a site where we can perform port scans online but there are some limitations.

They offer three types of scan; they are Quick Scan, Full Nmap Scan and Custom Scan. Let me explain you about each type in detail

Quick Scan --> -F -T5 -sS

F – Fast option, which scans all the ports registered in your /etc/services
T5 - the ping timeout value
sS - Launches a stealth SYN scan

Full Nmap Scan -->
-p (from port)-(to port) T4 -sS

p - Here you can specify the port range to scan
T4 - the ping timeout value
sS - Launches a stealth SYN scan

Custom Scan -->
Here you can specify your custom parameters and options to scan

Total scans performed so far when I checked that site is 264922! Actually we can use this online scan to check our firewall settings and also we can use it to test our network security. You have the option to send the scan results to your mail. They should implement some mechanism to restrict number of scans performed per IP to avoid abuse of this service.

This site displays the IP of the current system accessing the site at the top right corner of the page. Another easy way to find our external IP address in a single click! They also accept donation via PayPal and Moneybookers. I feel we can donate some amount for this great valuable service!


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