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Free Tool

nftables DDoS Protection Rule Generator

Generate modern nftables rulesets for Linux DDoS protection. nftables replaces iptables with better performance, atomic rule updates, and a cleaner syntax.

Protections

SYN Flood Protection
Rate limit new TCP connections with meters
Limit:/sec per IP
UDP Flood Protection
Rate limit UDP traffic per source
Limit:/sec per IP
ICMP Limiting
Prevent ping floods and ICMP abuse
Limit:/sec
Connection Tracking
Drop invalid states, accept established
Global Rate Limiting
Overall new connection rate limit
Limit:/sec total
Blackhole Set
Named set for dynamically blocking IPs
Port Filtering
Only allow specific service ports
nftables-ddos.conf
Select your protections and click Generate Rules to create your nftables ruleset.
Warning: Always test nftables rules before applying to production. Use nft -c -f nftables.conf to check syntax without applying. Keep out-of-band access available. On systemd systems, rules persist via /etc/nftables.conf and systemctl enable nftables.

nftables vs iptables - Why Migrate?

Featureiptablesnftables
Atomic rule replacementNo (rule-by-rule)Yes (entire ruleset)
Performance at scaleLinear matchingOptimized set lookups
IPv4 + IPv6 unifiedSeparate commandsinet family handles both
Named sets/mapsRequires ipsetBuilt-in
Kernel APILegacy xtablesModern nf_tables
SyntaxFlat CLI flagsStructured, readable
Tracing/debuggingLimitedBuilt-in trace support
Distro default (2024+)Being deprecatedDefault in most distros

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