nmap command

Identify A Remote Host Apps and OS Using UNIX / Linux Command Line

by Vivek Gite on June 10, 2009 · 0 comments

How do I identify remote server os and apps using UNIX or Linux command line options?

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psad: Linux Detect And Block Port Scan Attacks In Real Time

by Vivek Gite on August 6, 2008 · 27 comments

Q. How do I detect port scan attacks by analyzing Debian Linux firewall log files and block port scans in real time? How do I detect suspicious network traffic under Linux?

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ICMP IP Network Scanning / Probing using a Shell Commands

by Vivek Gite on December 13, 2007 · 0 comments

Q. How do I check security of my network by running ICMP IP Network Scanning under FreeBSD / Linux? How do I subnet broadcast addresses? All I wanted to see if my firewall is working or not. A. Internet Control Message Protocol (ICMP) one of the core protocols of the Internet protocol suite. It is [...]

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Linux port scanning with netcat (nc) command

by Vivek Gite on July 12, 2007 · 0 comments

Q. How do I find out which ports are opened on my own server? How do I run port scanning using nc command? A. It may be useful to know which ports are open and running services on a target machine. You can use nmap command for port scanning. How do I use nc to [...]

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