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
🐧 Get the latest tutorials on Linux, Open Source & DevOps via RSS feed or Weekly email newsletter.
🐧 0 comments... add one ↓
🐧 0 comments... add one ↓
Related Tutorials
| Category | List of Unix and Linux commands |
|---|---|
| Disk space analyzers | df • duf • ncdu • pydf |
| File Management | cat • cp • mkdir • tree |
| Firewall | Alpine Awall • CentOS 8 • OpenSUSE • RHEL 8 • Ubuntu 16.04 • Ubuntu 18.04 • Ubuntu 20.04 |
| Modern utilities | bat • exa |
| Network Utilities | NetHogs • dig • host • ip • nmap |
| OpenVPN | CentOS 7 • CentOS 8 • Debian 10 • Debian 8/9 • Ubuntu 18.04 • Ubuntu 20.04 |
| Package Manager | apk • apt |
| Processes Management | bg • chroot • cron • disown • fg • glances • gtop • jobs • killall • kill • pidof • pstree • pwdx • time • vtop |
| Searching | ag • grep • whereis • which |
| User Information | groups • id • lastcomm • last • lid/libuser-lid • logname • members • users • whoami • who • w |
| WireGuard VPN | Alpine • CentOS 8 • Debian 10 • Firewall • Ubuntu 20.04 |
