Q. How do I find out if I Linux box is under DoS attack or not form a shell prompt?
A. You can simply use netstat command to print out a list of all open connection to your Linux box. The list will be sorted out using sort command including total number of connections from a specific IP address.
Task: Looking at open connections (DoS)
Login as the root user
Type the following command
# netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
You should follow me on twitter here or grab rss feed to keep track of new changes.
Featured Articles:
- 30 Handy Bash Shell Aliases For Linux / Unix / Mac OS X
- Top 30 Nmap Command Examples For Sys/Network Admins
- 25 PHP Security Best Practices For Sys Admins
- 20 Linux System Monitoring Tools Every SysAdmin Should Know
- 20 Linux Server Hardening Security Tips
- Linux: 20 Iptables Examples For New SysAdmins
- Top 20 OpenSSH Server Best Security Practices
- Top 20 Nginx WebServer Best Security Practices
- 20 Examples: Make Sure Unix / Linux Configuration Files Are Free From Syntax Errors
- 15 Greatest Open Source Terminal Applications Of 2012
- My 10 UNIX Command Line Mistakes
- Top 10 Open Source Web-Based Project Management Software
- Top 5 Email Client For Linux, Mac OS X, and Windows Users
- The Novice Guide To Buying A Linux Laptop
{ 0 comments… add one now }