Skip to content

Instantly share code, notes, and snippets.

@thoward
Created August 8, 2013 00:04
Show Gist options
  • Save thoward/6180165 to your computer and use it in GitHub Desktop.
Save thoward/6180165 to your computer and use it in GitHub Desktop.
Prevent UDP flood
# Outbound UDP Flood protection in a user defined chain.
iptables -N udp-flood
iptables -A OUTPUT -p udp -j udp-flood
iptables -A udp-flood -p udp -m limit --limit 50/s -j RETURN
iptables -A udp-flood -j LOG --log-level 4 --log-prefix 'UDP-flood attempt: '
iptables -A udp-flood -j DROP
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment