Add nftables support with config generator and IP checker (#22)

* Add nftables support with config generator and IP checker

- Add generate_nft_blacklist.py for generating nftables configurations
- Add check_nft_blacklist.py for verifying IPs against blacklist
- Add blacklists_updater_nftables.sh for automated updates
- Add blacklists_nftables/ directory with generated configs
- Add GitHub Actions workflow for daily nftables updates
- Update README.md with nftables usage instructions

nftables is a modern replacement for iptables with better performance
and lower memory usage, especially for large rulesets. This addition
complements the existing iptables and nginx blacklist formats.

* Added nftables scripts help

.github/workflows/update_nftables.yml

@@ -0,0 +1,33 @@
+name: Update nftables Blacklists
+
+on:
+  schedule:
+    - cron: '30 2 * * *'  # Daily at 02:30 UTC
+  workflow_dispatch:
+
+jobs:
+  update-nftables:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.x'
+        
+    - name: Generate nftables blacklists
+      run: |
+        chmod +x blacklists_updater_nftables.sh
+        ./blacklists_updater_nftables.sh
+        
+    - name: Commit and push if changed
+      run: |
+        git config --local user.email "github-actions[bot]@users.noreply.github.com"
+        git config --local user.name "github-actions[bot]"
+        git add blacklists_nftables/
+        git diff --quiet && git diff --staged --quiet || \
+          (git commit -m "Auto-update nftables blacklists [skip ci]" && git push)
+

README.md

@@ -50,6 +50,14 @@ This repository contains Python scripts that allow you to retrieve network lists
 - `blacklist-v6.ipset`: IPSet configuration for IPv6 only (**daily generated**)
 - `README.md`: Complete usage documentation for iptables integration
 
+**nftables Format** (`blacklists_nftables/` folder):
+
+* `blacklist.nft`: nftables configuration for mixed IPv4/IPv6 (**daily generated**)
+* `blacklist-v4.nft`: nftables configuration for IPv4 only (**daily generated**)
+* `blacklist-v6.nft`: nftables configuration for IPv6 only (**daily generated**)
+* `README.md`: Complete usage documentation for nftables integration
+
+
 ### Reference Lists
 
 **Contributors are welcome!**
@@ -90,6 +98,15 @@ iptables -I INPUT -m set --match-set blacklist-v4 src -j DROP
 ip6tables -I INPUT -m set --match-set blacklist-v6 src -j DROP
 ```
 
+**For nftables:**
+````bash
+# Download and load into nftables
+wget https://raw.githubusercontent.com/C24Be/AS_Network_List/main/blacklists_nftables/blacklist.nft
+sudo nft -f blacklist.nft
+# View the loaded rules
+sudo nft list ruleset
+````
+
 **For Custom Applications:**
 
 ```bash
@@ -183,6 +200,20 @@ See the README files in each folder for detailed usage instructions.
     ./network_list_from_netname.py --help
     ```
 
+### `generate_nft_blacklist.py`
+1. Generate nftables config from blacklist:
+
+    ```bash
+    ./generate_nft_blacklist.py blacklists/blacklist.txt blacklist.nft
+    ```
+
+### `check_nft_blacklist.py`
+1. Check IP address against generated config:
+
+    ```bash
+    ./check_nft_blacklist.py blacklist.nft 77.37.166.239
+    ```
+
 ## Screenshots
 
 <img width="320" alt="image" src="https://github.com/C24Be/AS_Network_List/assets/153936414/71bd0ed4-0e9b-42f0-8e91-01964ea9b8e1">

blacklists_nftables/README.md

@@ -0,0 +1,185 @@
+# nftables Blacklist Configuration
+
+This folder contains nftables blacklist configurations generated from Russian government agency network lists.
+
+## Available Files
+
+- `blacklist.nft` - Mixed IPv4/IPv6 blacklist (**daily generated**)
+- `blacklist-v4.nft` - IPv4-only blacklist (**daily generated**)
+- `blacklist-v6.nft` - IPv6-only blacklist (**daily generated**)
+
+## Quick Start
+
+### Download and Load
+````bash
+# Download the blacklist
+wget https://raw.githubusercontent.com/C24Be/AS_Network_List/main/blacklists_nftables/blacklist.nft
+
+# Load the configuration
+sudo nft -f blacklist.nft
+
+# Verify it's loaded
+sudo nft list ruleset
+````
+
+### Automatic Updates
+
+Add to crontab for daily updates:
+````bash
+0 2 * * * wget -O /etc/nftables.d/blacklist.nft https://raw.githubusercontent.com/C24Be/AS_Network_List/main/blacklists_nftables/blacklist.nft && nft -f /etc/nftables.d/blacklist.nft
+````
+
+## Configuration Details
+
+The generated nftables configuration uses:
+- **Sets with interval flag** for efficient CIDR matching
+- **Named sets** (`blacklist_v4` and `blacklist_v6`) for easy management
+- **Counter** directive to track dropped packets
+- **Stateful filtering** to allow established connections
+
+### Configuration Structure
+table inet filter {
+set blacklist_v4 {
+type ipv4_addr
+flags interval
+elements = { 1.2.3.0/24, 5.6.7.0/24, ... }
+}
+set blacklist_v6 {
+    type ipv6_addr
+    flags interval
+    elements = { 2001:db8::/32, ... }
+}
+
+chain input {
+    type filter hook input priority 0;
+    policy accept;
+    
+    ct state { established, related } accept
+    
+    ip saddr @blacklist_v4 counter drop
+    ip6 saddr @blacklist_v6 counter drop
+}
+}
+
+## Integration Options
+
+### Option 1: Standalone Configuration
+
+Load the blacklist as a complete ruleset:
+````bash
+sudo nft -f blacklist.nft
+````
+
+### Option 2: Include in Existing Configuration
+
+If you have an existing nftables configuration:
+
+1. Copy only the set definitions from the generated file
+2. Add set lookups to your existing input chain:
+````bash
+ip saddr @blacklist_v4 counter drop
+ip6 saddr @blacklist_v6 counter drop
+````
+
+### Option 3: Persistent Configuration
+
+For systemd-based systems:
+````bash
+# Copy to nftables config directory
+sudo cp blacklist.nft /etc/nftables.d/
+
+# Edit /etc/nftables.conf to include:
+# include "/etc/nftables.d/blacklist.nft"
+
+# Enable and restart
+sudo systemctl enable nftables
+sudo systemctl restart nftables
+````
+
+## Checking IPs Against the Blacklist
+
+Use the `check_nft_blacklist.py` script to verify if an IP is blocked:
+````bash
+# Check an IPv4 address
+python3 check_nft_blacklist.py blacklist.nft 192.168.1.1
+
+# Check an IPv6 address
+python3 check_nft_blacklist.py blacklist.nft 2001:db8::1
+````
+
+## Monitoring
+
+### View Dropped Packets
+````bash
+# View all rules with counters
+sudo nft list chain inet filter input -a
+
+# Monitor in real-time
+sudo nft monitor
+````
+
+### Check Set Contents
+````bash
+# View IPv4 blacklist
+sudo nft list set inet filter blacklist_v4
+
+# View IPv6 blacklist
+sudo nft list set inet filter blacklist_v6
+````
+
+## Advantages of nftables
+
+- **Better Performance**: O(1) lookup time with sets vs O(n) for sequential rules
+- **Lower Memory Usage**: More efficient than iptables for large rulesets
+- **Atomic Updates**: All rules updated in a single transaction
+- **Modern Syntax**: Cleaner, more readable configuration
+- **Unified Tool**: Single tool for IPv4, IPv6, and ARP filtering
+
+## File Format Comparison
+
+| Format | Use Case | Performance | Memory |
+|--------|----------|-------------|--------|
+| **nftables** | Modern firewalls | Excellent | Low |
+| **iptables** | Legacy systems | Good | Medium |
+| **nginx** | Web layer | Good | Low |
+
+## Troubleshooting
+
+### Configuration Won't Load
+````bash
+# Check syntax
+sudo nft -c -f blacklist.nft
+
+# View detailed errors
+sudo nft -f blacklist.nft 2>&1 | less
+````
+
+### Rules Not Blocking Traffic
+````bash
+# Verify sets are populated
+sudo nft list set inet filter blacklist_v4 | wc -l
+
+# Check rule priority
+sudo nft list chain inet filter input
+
+# Test with logging temporarily
+sudo nft add rule inet filter input ip saddr @blacklist_v4 log prefix "BLOCKED: "
+````
+
+### Performance Issues
+
+If experiencing performance problems with very large sets:
+
+1. Consider splitting into multiple smaller sets
+2. Use `blacklist-v4.nft` or `blacklist-v6.nft` if only one protocol is needed
+3. Ensure kernel supports nftables fully (Linux 4.0+)
+
+## Additional Resources
+
+- [nftables Wiki](https://wiki.nftables.org/)
+- [nftables Quick Reference](https://wiki.nftables.org/wiki-nftables/index.php/Quick_reference-nftables_in_10_minutes)
+- [Netfilter Documentation](https://www.netfilter.org/documentation/)
+
+## Contributing
+
+Found an issue or have suggestions? Please open an issue or submit a pull request!

blacklists_nftables/blacklist-v4.nft

@@ -0,0 +1,844 @@
+# Autogenerated nftables blacklist
+# Generated: 2026-01-12T09:09:01.967693Z
+# Source: /tmp/blacklist-v4.txt
+# IPv4: 816, IPv6: 0
+
+table inet filter {
+
+    set blacklist_v4 {
+        type ipv4_addr
+        flags interval
+        elements = {
+            5.61.16.0/21,
+            5.61.232.0/21,
+            5.101.40.0/22,
+            5.181.60.0/22,
+            5.188.140.0/22,
+            31.44.63.64/29,
+            31.177.95.0/24,
+            31.177.104.0/22,
+            37.28.161.48/30,
+            37.29.53.16/30,
+            37.29.57.52/30,
+            37.29.57.64/30,
+            37.29.59.56/30,
+            37.139.32.0/22,
+            37.139.40.0/22,
+            45.84.128.0/22,
+            45.136.20.0/22,
+            46.20.70.160/28,
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+            94.25.90.240/29,
+            94.25.95.136/30,
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+            94.100.176.0/20,
+            94.124.192.192/29,
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+            95.53.248.0/29,
+            95.54.193.80/28,
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+            95.163.216.0/22,
+            95.163.248.0/21,
+            95.167.2.4/30,
+            95.167.4.168/29,
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+            95.167.76.160/27,
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+            95.167.113.48/30,
+            95.167.114.48/30,
+            95.167.121.68/30,
+            95.167.122.128/28,
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+            95.167.157.156/30,
+            95.167.162.76/30,
+            95.167.162.236/30,
+            95.167.176.0/23,
+            95.167.213.0/24,
+            95.173.128.0/19,
+            95.213.0.0/17,
+            109.73.4.224/27,
+            109.120.180.0/22,
+            109.120.188.0/22,
+            109.124.66.128/30,
+            109.124.66.160/28,
+            109.124.71.64/29,
+            109.124.78.108/30,
+            109.124.80.132/30,
+            109.124.83.20/30,
+            109.124.87.96/29,
+            109.124.89.36/30,
+            109.124.89.140/30,
+            109.124.89.212/30,
+            109.124.90.32/30,
+            109.124.90.128/30,
+            109.124.97.4/30,
+            109.124.99.16/30,
+            109.124.99.160/28,
+            109.124.119.88/29,
+            109.204.204.232/29,
+            109.207.0.0/20,
+            109.232.187.16/29,
+            109.248.197.0/24,
+            128.140.168.0/21,
+            130.49.224.0/19,
+            145.255.238.240/28,
+            146.185.208.0/22,
+            146.185.240.0/22,
+            149.62.55.240/30,
+            155.212.192.0/20,
+            176.109.0.0/21,
+            176.112.168.0/21,
+            176.116.96.0/20,
+            178.16.156.148/30,
+            178.17.176.0/20,
+            178.20.234.224/29,
+            178.22.88.0/21,
+            178.49.148.176/29,
+            178.237.16.0/20,
+            178.237.206.0/24,
+            178.237.240.0/20,
+            178.248.232.60/32,
+            178.248.232.137/32,
+            178.248.233.26/32,
+            178.248.233.32/32,
+            178.248.233.60/32,
+            178.248.233.136/32,
+            178.248.233.244/31,
+            178.248.234.30/32,
+            178.248.234.33/32,
+            178.248.234.60/32,
+            178.248.234.79/32,
+            178.248.234.83/32,
+            178.248.234.136/32,
+            178.248.234.204/32,
+            178.248.234.228/32,
+            178.248.234.238/32,
+            178.248.235.60/32,
+            178.248.235.75/32,
+            178.248.235.244/32,
+            178.248.236.20/32,
+            178.248.236.83/32,
+            178.248.236.244/32,
+            178.248.237.18/32,
+            178.248.237.98/32,
+            178.248.237.136/32,
+            178.248.237.242/32,
+            178.248.238.55/32,
+            178.248.238.102/32,
+            178.248.238.128/31,
+            178.248.238.136/32,
+            178.248.238.155/32,
+            178.248.238.172/32,
+            178.248.238.205/32,
+            178.248.238.255/32,
+            178.248.239.215/32,
+            185.5.136.0/22,
+            185.6.244.0/22,
+            185.7.234.188/30,
+            185.16.8.0/22,
+            185.16.148.0/22,
+            185.16.244.0/22,
+            185.29.128.0/22,
+            185.32.248.0/22,
+            185.65.149.170/32,
+            185.86.144.0/22,
+            185.100.104.0/22,
+            185.130.112.0/22,
+            185.131.68.0/22,
+            185.149.160.0/22,
+            185.168.60.0/22,
+            185.179.224.0/22,
+            185.180.200.0/22,
+            185.183.172.0/22,
+            185.187.63.0/24,
+            185.224.228.0/22,
+            185.226.52.0/22,
+            185.241.192.0/22,
+            188.93.56.0/21,
+            188.128.8.240/30,
+            188.128.11.196/30,
+            188.128.89.0/30,
+            188.128.92.104/30,
+            188.128.94.204/30,
+            188.128.98.204/30,
+            188.128.101.108/30,
+            188.128.112.216/29,
+            188.128.112.240/29,
+            188.128.113.0/28,
+            188.128.114.128/28,
+            188.128.115.232/29,
+            188.128.118.224/27,
+            188.128.119.104/30,
+            188.128.122.240/30,
+            188.247.36.124/30,
+            188.247.36.128/28,
+            188.247.36.204/30,
+            193.33.230.0/23,
+            193.47.146.0/24,
+            193.203.40.0/22,
+            193.232.70.0/24,
+            194.8.70.0/23,
+            194.8.246.0/23,
+            194.67.63.200/30,
+            194.84.16.12/30,
+            194.140.247.0/24,
+            194.150.202.0/23,
+            194.165.22.0/23,
+            194.186.63.0/24,
+            194.186.112.80/28,
+            194.190.9.0/24,
+            194.215.248.0/24,
+            194.226.80.0/20,
+            194.226.116.0/22,
+            194.226.127.0/24,
+            195.3.240.0/22,
+            195.16.55.224/27,
+            195.42.75.8/29,
+            195.54.20.168/29,
+            195.54.28.72/30,
+            195.54.221.0/24,
+            195.58.5.16/29,
+            195.58.13.120/30,
+            195.58.21.196/30,
+            195.58.29.57/32,
+            195.58.30.164/30,
+            195.58.30.200/29,
+            195.80.224.0/24,
+            195.98.38.16/28,
+            195.98.43.104/29,
+            195.98.73.56/29,
+            195.98.77.100/30,
+            195.128.157.0/24,
+            195.131.7.8/29,
+            195.131.53.248/29,
+            195.131.61.80/29,
+            195.131.63.24/29,
+            195.144.226.224/28,
+            195.144.232.144/30,
+            195.144.240.128/28,
+            195.149.110.0/24,
+            195.151.25.48/29,
+            195.162.36.64/28,
+            195.170.218.24/29,
+            195.170.218.88/29,
+            195.182.142.128/26,
+            195.182.145.64/28,
+            195.182.151.212/30,
+            195.182.151.216/30,
+            195.182.155.164/30,
+            195.182.156.96/30,
+            195.209.120.0/22,
+            195.211.20.0/22,
+            195.218.175.40/29,
+            195.218.190.0/23,
+            195.226.203.0/24,
+            195.239.80.32/29,
+            195.239.113.0/24,
+            195.239.247.0/24,
+            212.13.104.116/30,
+            212.13.113.100/30,
+            212.15.105.64/28,
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+            212.15.115.80/28,
+            212.17.8.176/29,
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+            212.23.85.48/30,
+            212.23.85.56/29,
+            212.32.198.64/29,
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+            212.48.53.76/30,
+            212.48.53.84/30,
+            212.48.53.88/29,
+            212.48.53.100/30,
+            212.48.53.144/30,
+            212.48.53.152/29,
+            212.48.53.160/29,
+            212.48.53.184/29,
+            212.48.53.192/29,
+            212.48.53.200/30,
+            212.48.53.216/30,
+            212.48.53.236/30,
+            212.48.53.240/28,
+            212.48.54.0/30,
+            212.48.54.8/29,
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+            212.48.54.48/28,
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+            212.59.99.96/27,
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+            212.120.189.208/29,
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+            212.192.156.0/22,
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+            213.85.77.64/27,
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+            213.147.55.108/30,
+            213.172.4.192/26,
+            213.172.17.252/30,
+            213.172.18.60/30,
+            213.172.18.124/30,
+            213.172.18.148/30,
+            213.172.18.160/29,
+            213.172.18.252/30,
+            213.172.27.0/30,
+            213.172.27.116/30,
+            213.172.27.160/30,
+            213.172.27.204/30,
+            213.172.27.212/30,
+            213.172.27.224/30,
+            213.172.27.252/30,
+            213.172.30.136/30,
+            213.176.232.0/22,
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+            213.219.237.68/30,
+            213.234.8.8/30,
+            213.234.13.60/30,
+            213.234.15.228/30,
+            213.234.15.248/30,
+            213.234.18.52/30,
+            213.242.204.76/30,
+            213.242.204.236/30,
+            213.242.205.88/30,
+            213.242.215.68/30,
+            213.242.215.192/29,
+            213.243.84.80/28,
+            213.243.106.48/28,
+            213.243.116.0/24,
+            217.16.16.0/20,
+            217.20.86.128/26,
+            217.20.86.232/29,
+            217.20.144.0/20,
+            217.23.88.168/29,
+            217.23.88.248/29,
+            217.27.142.176/30,
+            217.65.214.24/29,
+            217.65.219.160/29,
+            217.67.177.208/29,
+            217.69.128.0/20,
+            217.106.0.0/16,
+            217.107.5.8/29,
+            217.107.5.16/28,
+            217.107.5.40/29,
+            217.107.5.80/28,
+            217.107.5.96/29,
+            217.107.5.112/29,
+            217.107.200.0/21,
+            217.147.23.112/28,
+            217.148.216.156/30,
+            217.148.220.160/29,
+            217.172.18.0/23,
+            217.174.188.0/22,
+            217.195.92.16/28,
+            217.195.93.144/29,
+            217.195.94.200/29
+        }
+    }
+
+    set blacklist_v6 {
+        type ipv6_addr
+        flags interval
+    }
+
+    chain input {
+        type filter hook input priority 0;
+        policy accept;
+
+        ct state { established, related } accept
+
+        ip saddr @blacklist_v4 counter drop
+    }
+}

blacklists_nftables/blacklist-v6.nft

@@ -0,0 +1,45 @@
+# Autogenerated nftables blacklist
+# Generated: 2026-01-12T09:09:02.010763Z
+# Source: /tmp/blacklist-v6.txt
+# IPv4: 0, IPv6: 17
+
+table inet filter {
+
+    set blacklist_v4 {
+        type ipv4_addr
+        flags interval
+    }
+
+    set blacklist_v6 {
+        type ipv6_addr
+        flags interval
+        elements = {
+            2a00:1148::/29,
+            2a00:46e0::/32,
+            2a00:a300::/32,
+            2a00:b4c0::/32,
+            2a00:bdc0::/33,
+            2a00:bdc0:8000::/34,
+            2a00:bdc0:c000::/35,
+            2a00:bdc0:e002::/47,
+            2a00:bdc0:e004::/47,
+            2a00:bdc0:e007::/48,
+            2a00:bdc0:f000::/36,
+            2a00:bdc1::/32,
+            2a00:bdc2::/31,
+            2a00:bdc4::/30,
+            2a14:25c0::/32,
+            2a14:25c5::/32,
+            2a14:25c6::/31
+        }
+    }
+
+    chain input {
+        type filter hook input priority 0;
+        policy accept;
+
+        ct state { established, related } accept
+
+        ip6 saddr @blacklist_v6 counter drop
+    }
+}

blacklists_nftables/blacklist.nft

@@ -0,0 +1,864 @@
+# Autogenerated nftables blacklist
+# Generated: 2026-01-12T09:09:01.912886Z
+# Source: /home/user/AS_Network_List/blacklists/blacklist.txt
+# IPv4: 816, IPv6: 17
+
+table inet filter {
+
+    set blacklist_v4 {
+        type ipv4_addr
+        flags interval
+        elements = {
+            5.61.16.0/21,
+            5.61.232.0/21,
+            5.101.40.0/22,
+            5.181.60.0/22,
+            5.188.140.0/22,
+            31.44.63.64/29,
+            31.177.95.0/24,
+            31.177.104.0/22,
+            37.28.161.48/30,
+            37.29.53.16/30,
+            37.29.57.52/30,
+            37.29.57.64/30,
+            37.29.59.56/30,
+            37.139.32.0/22,
+            37.139.40.0/22,
+            45.84.128.0/22,
+            45.136.20.0/22,
+            46.20.70.160/28,
+            46.29.152.0/22,
+            46.46.142.160/28,
+            46.46.148.40/29,
+            46.47.197.128/30,
+            46.47.199.76/30,
+            46.47.203.52/30,
+            46.47.207.96/30,
+            46.47.208.84/30,
+            46.47.210.76/30,
+            46.47.211.0/24,
+            46.47.212.204/30,
+            46.47.213.0/24,
+            46.47.214.200/30,
+            46.47.219.200/30,
+            46.47.223.196/30,
+            46.47.229.0/28,
+            46.47.238.144/30,
+            46.47.249.176/29,
+            46.61.208.0/24,
+            46.228.0.232/29,
+            62.5.130.104/29,
+            62.5.132.224/29,
+            62.5.189.80/29,
+            62.5.202.60/30,
+            62.5.218.204/30,
+            62.5.224.188/30,
+            62.5.242.80/28,
+            62.28.169.168/30,
+            62.33.34.16/28,
+            62.33.87.128/28,
+            62.33.87.152/29,
+            62.33.199.80/29,
+            62.63.96.32/28,
+            62.63.98.24/29,
+            62.63.100.160/30,
+            62.63.101.80/29,
+            62.76.98.0/24,
+            62.105.158.200/29,
+            62.112.110.64/28,
+            62.118.0.208/28,
+            62.118.15.16/28,
+            62.118.17.152/29,
+            62.118.19.40/30,
+            62.118.19.112/30,
+            62.118.21.160/29,
+            62.118.25.112/28,
+            62.118.37.4/30,
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+            195.182.151.216/30,
+            195.182.155.164/30,
+            195.182.156.96/30,
+            195.209.120.0/22,
+            195.211.20.0/22,
+            195.218.175.40/29,
+            195.218.190.0/23,
+            195.226.203.0/24,
+            195.239.80.32/29,
+            195.239.113.0/24,
+            195.239.247.0/24,
+            212.13.104.116/30,
+            212.13.113.100/30,
+            212.15.105.64/28,
+            212.15.114.156/30,
+            212.15.115.80/28,
+            212.17.8.176/29,
+            212.17.9.144/28,
+            212.17.16.192/27,
+            212.17.17.176/28,
+            212.23.85.48/30,
+            212.23.85.56/29,
+            212.32.198.64/29,
+            212.48.34.176/28,
+            212.48.53.76/30,
+            212.48.53.84/30,
+            212.48.53.88/29,
+            212.48.53.100/30,
+            212.48.53.144/30,
+            212.48.53.152/29,
+            212.48.53.160/29,
+            212.48.53.184/29,
+            212.48.53.192/29,
+            212.48.53.200/30,
+            212.48.53.216/30,
+            212.48.53.236/30,
+            212.48.53.240/28,
+            212.48.54.0/30,
+            212.48.54.8/29,
+            212.48.54.16/28,
+            212.48.54.32/29,
+            212.48.54.44/30,
+            212.48.54.48/28,
+            212.48.54.64/28,
+            212.48.54.80/29,
+            212.48.54.92/30,
+            212.48.54.96/27,
+            212.48.54.128/27,
+            212.48.54.164/30,
+            212.48.54.168/29,
+            212.48.54.176/28,
+            212.48.54.196/30,
+            212.48.54.200/30,
+            212.48.54.208/28,
+            212.48.54.240/28,
+            212.48.134.192/26,
+            212.48.138.240/28,
+            212.48.141.160/27,
+            212.49.107.224/27,
+            212.49.124.0/26,
+            212.57.133.0/24,
+            212.57.159.0/24,
+            212.59.98.48/29,
+            212.59.99.96/27,
+            212.111.84.0/22,
+            212.119.174.0/23,
+            212.120.169.48/29,
+            212.120.174.88/29,
+            212.120.184.48/28,
+            212.120.184.64/29,
+            212.120.189.208/29,
+            212.120.189.224/29,
+            212.120.190.112/29,
+            212.120.190.240/29,
+            212.120.191.120/29,
+            212.120.191.248/29,
+            212.192.156.0/22,
+            212.233.72.0/21,
+            212.233.88.0/21,
+            212.233.96.0/22,
+            212.233.120.0/22,
+            213.24.34.0/24,
+            213.24.75.0/24,
+            213.24.76.0/23,
+            213.24.128.0/22,
+            213.24.143.0/24,
+            213.24.152.0/22,
+            213.24.160.0/28,
+            213.33.171.240/29,
+            213.59.59.16/29,
+            213.59.59.64/29,
+            213.59.59.120/29,
+            213.59.59.128/29,
+            213.59.59.144/29,
+            213.59.59.168/29,
+            213.59.91.48/29,
+            213.59.91.128/27,
+            213.59.91.176/28,
+            213.85.2.64/28,
+            213.85.2.80/29,
+            213.85.20.8/30,
+            213.85.20.32/30,
+            213.85.20.84/30,
+            213.85.77.64/27,
+            213.85.142.176/28,
+            213.147.55.108/30,
+            213.172.4.192/26,
+            213.172.17.252/30,
+            213.172.18.60/30,
+            213.172.18.124/30,
+            213.172.18.148/30,
+            213.172.18.160/29,
+            213.172.18.252/30,
+            213.172.27.0/30,
+            213.172.27.116/30,
+            213.172.27.160/30,
+            213.172.27.204/30,
+            213.172.27.212/30,
+            213.172.27.224/30,
+            213.172.27.252/30,
+            213.172.30.136/30,
+            213.176.232.0/22,
+            213.177.111.0/24,
+            213.183.253.56/29,
+            213.219.212.0/22,
+            213.219.237.68/30,
+            213.234.8.8/30,
+            213.234.13.60/30,
+            213.234.15.228/30,
+            213.234.15.248/30,
+            213.234.18.52/30,
+            213.242.204.76/30,
+            213.242.204.236/30,
+            213.242.205.88/30,
+            213.242.215.68/30,
+            213.242.215.192/29,
+            213.243.84.80/28,
+            213.243.106.48/28,
+            213.243.116.0/24,
+            217.16.16.0/20,
+            217.20.86.128/26,
+            217.20.86.232/29,
+            217.20.144.0/20,
+            217.23.88.168/29,
+            217.23.88.248/29,
+            217.27.142.176/30,
+            217.65.214.24/29,
+            217.65.219.160/29,
+            217.67.177.208/29,
+            217.69.128.0/20,
+            217.106.0.0/16,
+            217.107.5.8/29,
+            217.107.5.16/28,
+            217.107.5.40/29,
+            217.107.5.80/28,
+            217.107.5.96/29,
+            217.107.5.112/29,
+            217.107.200.0/21,
+            217.147.23.112/28,
+            217.148.216.156/30,
+            217.148.220.160/29,
+            217.172.18.0/23,
+            217.174.188.0/22,
+            217.195.92.16/28,
+            217.195.93.144/29,
+            217.195.94.200/29
+        }
+    }
+
+    set blacklist_v6 {
+        type ipv6_addr
+        flags interval
+        elements = {
+            2a00:1148::/29,
+            2a00:46e0::/32,
+            2a00:a300::/32,
+            2a00:b4c0::/32,
+            2a00:bdc0::/33,
+            2a00:bdc0:8000::/34,
+            2a00:bdc0:c000::/35,
+            2a00:bdc0:e002::/47,
+            2a00:bdc0:e004::/47,
+            2a00:bdc0:e007::/48,
+            2a00:bdc0:f000::/36,
+            2a00:bdc1::/32,
+            2a00:bdc2::/31,
+            2a00:bdc4::/30,
+            2a14:25c0::/32,
+            2a14:25c5::/32,
+            2a14:25c6::/31
+        }
+    }
+
+    chain input {
+        type filter hook input priority 0;
+        policy accept;
+
+        ct state { established, related } accept
+
+        ip saddr @blacklist_v4 counter drop
+        ip6 saddr @blacklist_v6 counter drop
+    }
+}

blacklists_updater_nftables.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+# Generates nftables blacklist configurations from the main blacklist
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+INPUT_FILE="$SCRIPT_DIR/blacklists/blacklist.txt"
+OUTPUT_DIR="$SCRIPT_DIR/blacklists_nftables"
+
+# Create output directory if it doesn't exist
+mkdir -p "$OUTPUT_DIR"
+
+echo "Generating nftables blacklists..."
+
+# Generate mixed IPv4/IPv6 blacklist
+python3 "$SCRIPT_DIR/generate_nft_blacklist.py" \
+    "$INPUT_FILE" \
+    "$OUTPUT_DIR/blacklist.nft"
+
+# Generate IPv4-only blacklist
+grep -E '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+' "$INPUT_FILE" > /tmp/blacklist-v4.txt || true
+python3 "$SCRIPT_DIR/generate_nft_blacklist.py" \
+    /tmp/blacklist-v4.txt \
+    "$OUTPUT_DIR/blacklist-v4.nft"
+
+# Generate IPv6-only blacklist
+grep -E '^[0-9a-fA-F:]+:' "$INPUT_FILE" > /tmp/blacklist-v6.txt || true
+python3 "$SCRIPT_DIR/generate_nft_blacklist.py" \
+    /tmp/blacklist-v6.txt \
+    "$OUTPUT_DIR/blacklist-v6.nft"
+
+# Clean up temp files
+rm -f /tmp/blacklist-v4.txt /tmp/blacklist-v6.txt
+
+echo "nftables blacklists generated successfully!"

check_nft_blacklist.py

@@ -0,0 +1,113 @@
+#!/usr/bin/env python3
+"""
+check_nft_blacklist.py
+Checks if an IP address is in the nftables blacklist configuration.
+Usage:
+  check_nft_blacklist.py nft_bl.conf 192.168.1.1
+  check_nft_blacklist.py nft_bl.conf 2001:db8::1
+"""
+
+import sys
+import re
+from ipaddress import ip_address, ip_network, AddressValueError
+from pathlib import Path
+
+def parse_nft_config(config_path):
+    """Extract IPv4 and IPv6 prefixes from nftables config."""
+    p = Path(config_path)
+    if not p.exists():
+        raise FileNotFoundError(f"Config file not found: {config_path}")
+    
+    content = p.read_text(encoding="utf-8")
+    v4_prefixes = []
+    v6_prefixes = []
+    
+    # Parse IPv4 set (blacklist_v4)
+    v4_match = re.search(
+        r'set blacklist_v4\s*\{[^}]*elements\s*=\s*\{([^}]+)\}',
+        content,
+        re.DOTALL
+    )
+    if v4_match:
+        elements = v4_match.group(1)
+        # Extract all CIDR notations
+        for match in re.finditer(r'(\d+\.\d+\.\d+\.\d+(?:/\d+)?)', elements):
+            try:
+                v4_prefixes.append(ip_network(match.group(1), strict=False))
+            except Exception as e:
+                print(f"Warning: Could not parse IPv4 prefix '{match.group(1)}': {e}", file=sys.stderr)
+    
+    # Parse IPv6 set (blacklist_v6)
+    v6_match = re.search(
+        r'set blacklist_v6\s*\{[^}]*elements\s*=\s*\{([^}]+)\}',
+        content,
+        re.DOTALL
+    )
+    if v6_match:
+        elements = v6_match.group(1)
+        # Extract all IPv6 CIDR notations
+        for match in re.finditer(r'([0-9a-fA-F:]+(?:/\d+)?)', elements):
+            try:
+                v6_prefixes.append(ip_network(match.group(1), strict=False))
+            except Exception as e:
+                # Skip false matches from comments or other text
+                pass
+    
+    return v4_prefixes, v6_prefixes
+
+def check_ip_in_blacklist(ip_addr, v4_prefixes, v6_prefixes):
+    """Check if IP address is in any of the blacklist prefixes."""
+    try:
+        addr = ip_address(ip_addr)
+    except AddressValueError as e:
+        raise ValueError(f"Invalid IP address: {ip_addr} ({e})")
+    
+    prefixes = v4_prefixes if addr.version == 4 else v6_prefixes
+    
+    for prefix in prefixes:
+        if addr in prefix:
+            return True, prefix
+    
+    return False, None
+
+def main(argv):
+    if len(argv) < 3:
+        print("Usage: python3 check_nft_blacklist.py <nft_config.conf> <ip_address>")
+        print("Examples:")
+        print("  check_nft_blacklist.py nft_bl.conf 192.168.1.1")
+        print("  check_nft_blacklist.py nft_bl.conf 2001:db8::1")
+        return 2
+    
+    config_file = argv[1]
+    ip_to_check = argv[2]
+    
+    # Parse the nftables config
+    try:
+        print(f"Loading blacklist from: {config_file}")
+        v4_prefixes, v6_prefixes = parse_nft_config(config_file)
+        print(f"Loaded {len(v4_prefixes)} IPv4 prefixes and {len(v6_prefixes)} IPv6 prefixes")
+    except Exception as e:
+        print(f"ERROR: Could not parse config file: {e}", file=sys.stderr)
+        return 3
+    
+    # Check if IP is in blacklist
+    try:
+        is_blocked, matching_prefix = check_ip_in_blacklist(ip_to_check, v4_prefixes, v6_prefixes)
+        
+        print(f"\nChecking IP: {ip_to_check}")
+        print("-" * 50)
+        
+        if is_blocked:
+            print(f"✗ BLOCKED - IP is in blacklist")
+            print(f"  Matching prefix: {matching_prefix}")
+            return 1
+        else:
+            print(f"✓ OK - IP is NOT in blacklist")
+            return 0
+            
+    except ValueError as e:
+        print(f"ERROR: {e}", file=sys.stderr)
+        return 4
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))

generate_nft_blacklist.py

@@ -0,0 +1,155 @@
+#!/usr/bin/env python3
+"""
+generate_nft_blacklist.py
+Reads prefixes from a file or stdin, aggregates them and writes nftables config.
+Uses named sets for efficient blacklist management.
+Usage:
+  git clone https://github.com/C24Be/AS_Network_List.git
+  generate_nft_blacklist.py ./AS_Network_List/blacklists/blacklist.txt nft_bl.conf
+  cp nft_bl.conf /etc/nftables.d/
+  systemctl restart nftables
+"""
+
+import sys
+from ipaddress import ip_network, collapse_addresses
+from pathlib import Path
+from datetime import datetime
+
+def read_lines(path_or_dash):
+    if path_or_dash == "-":
+        print("Reading prefixes from STDIN...")
+        return [ln.rstrip("\n") for ln in sys.stdin]
+    p = Path(path_or_dash)
+    if not p.exists():
+        raise FileNotFoundError(f"Input file not found: {path_or_dash}")
+    text = p.read_text(encoding="utf-8")
+    return text.splitlines()
+
+def aggregate_prefixes(lines):
+    v4, v6, invalid = [], [], []
+    for lineno, ln in enumerate(lines, start=1):
+        s = ln.strip()
+        if not s or s.startswith("#"):
+            continue
+        try:
+            net = ip_network(s, strict=False)
+            if net.version == 4:
+                v4.append(net)
+            else:
+                v6.append(net)
+        except Exception as e:
+            invalid.append((lineno, s, str(e)))
+    agg_v4 = list(collapse_addresses(sorted(v4, key=lambda x: (int(x.network_address), x.prefixlen))))
+    agg_v6 = list(collapse_addresses(sorted(v6, key=lambda x: (int(x.network_address), x.prefixlen))))
+    return agg_v4, agg_v6, invalid
+
+def make_nft_config(agg_v4, agg_v6, comment=None):
+    lines = []
+    lines.append("# Autogenerated nftables blacklist")
+    lines.append(f"# Generated: {datetime.utcnow().isoformat()}Z")
+    if comment:
+        lines.append(f"# {comment}")
+    lines.append(f"# IPv4: {len(agg_v4)}, IPv6: {len(agg_v6)}")
+    lines.append("")
+    lines.append("table inet filter {")
+    lines.append("")
+    
+    # Define IPv4 blacklist set
+    lines.append("    set blacklist_v4 {")
+    lines.append("        type ipv4_addr")
+    lines.append("        flags interval")
+    if agg_v4:
+        lines.append("        elements = {")
+        for i, net in enumerate(agg_v4):
+            comma = "," if i < len(agg_v4) - 1 else ""
+            lines.append(f"            {net.with_prefixlen}{comma}")
+        lines.append("        }")
+    lines.append("    }")
+    lines.append("")
+    
+    # Define IPv6 blacklist set
+    lines.append("    set blacklist_v6 {")
+    lines.append("        type ipv6_addr")
+    lines.append("        flags interval")
+    if agg_v6:
+        lines.append("        elements = {")
+        for i, net in enumerate(agg_v6):
+            comma = "," if i < len(agg_v6) - 1 else ""
+            lines.append(f"            {net.with_prefixlen}{comma}")
+        lines.append("        }")
+    lines.append("    }")
+    lines.append("")
+    
+    # Define input chain with set lookups
+    lines.append("    chain input {")
+    lines.append("        type filter hook input priority 0;")
+    lines.append("        policy accept;")
+    lines.append("")
+    lines.append("        ct state { established, related } accept")
+    lines.append("")
+    if agg_v4:
+        lines.append("        ip saddr @blacklist_v4 counter drop")
+    if agg_v6:
+        lines.append("        ip6 saddr @blacklist_v6 counter drop")
+    lines.append("    }")
+    lines.append("}")
+    return "\n".join(lines)
+
+def write_output(outpath, content):
+    if outpath == "-":
+        print(content)
+        return
+    p = Path(outpath)
+    p.write_text(content, encoding="utf-8")
+    p.chmod(0o644)
+    print(f"Wrote nft config to: {p} (size: {p.stat().st_size} bytes)")
+
+def main(argv):
+    if len(argv) < 3:
+        print("Usage: python3 generate_nft_blacklist.py input.txt output.conf")
+        print("Use '-' as input or output to mean STDIN/STDOUT respectively.")
+        return 2
+
+    infile, outfile = argv[1], argv[2]
+    try:
+        lines = read_lines(infile)
+    except Exception as e:
+        print(f"ERROR reading input: {e}", file=sys.stderr)
+        return 3
+
+    if not any(line.strip() and not line.strip().startswith("#") for line in lines):
+        print("WARNING: input contains no prefixes (empty or only comments). Nothing to aggregate.")
+        nft_conf = make_nft_config([], [], comment="Empty input produced no prefixes")
+        write_output(outfile, nft_conf)
+        return 0
+
+    agg_v4, agg_v6, invalid = aggregate_prefixes(lines)
+
+    if invalid:
+        print("Some lines could not be parsed (line, text, error):")
+        for ln, txt, err in invalid:
+            print(f"  {ln}: '{txt}' --> {err}", file=sys.stderr)
+
+    print(f"Aggregated IPv4 prefixes: {len(agg_v4)}")
+    for n in agg_v4:
+        print("  v4:", n)
+    print(f"Aggregated IPv6 prefixes: {len(agg_v6)}")
+    for n in agg_v6:
+        print("  v6:", n)
+
+    nft_conf = make_nft_config(agg_v4, agg_v6, comment=f"Source: {infile}")
+    try:
+        write_output(outfile, nft_conf)
+    except Exception as e:
+        print(f"ERROR writing output: {e}", file=sys.stderr)
+        return 4
+
+    print("Done.")
+    print("Load with: sudo nft -f <output.conf>")
+    print("View counters: sudo nft list chain inet filter input -a")
+    print("View sets: sudo nft list set inet filter blacklist_v4")
+    print("           sudo nft list set inet filter blacklist_v6")
+    return 0
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))