CIDRe is a CLI tool that fetches daily updated IP allocations from Regional Internet Registries (RIRs), compiles them into country-based CIDR files, and allows easy firewall management.

🔹 Supports AFRINIC, APNIC, ARIN, LACNIC, RIPE NCC
🔹 Daily automatic CIDR updates in the repository
🔹 Merges and optimizes CIDR blocks for efficiency
🔹 Firewall integration (UFW & iptables /w ipset support)
🔹 IPv4 & IPv6 compatible

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⚡ Quick start

1️⃣ Install CIDRE

pip install cidre-cli

2️⃣ Pull & merge CIDR ranges

cidre pull --merge

• Downloads the latest CIDR allocations from RIRs.
• Merges overlapping IP ranges for efficiency.

3️⃣ Block specific countries

# UFW is better suited for small CIDR inputs
cidre deny ir kp --firewall ufw

• Blocks Iran (IR), and North Korea (KP) in UFW.
• Requires ufw installed (sudo apt install ufw).

# iptables is better suited for large CIDR inputs
cidre deny ru ir kp --firewall iptables

• Blocks Russia (RU), Iran (IR), and North Korea (KP) in iptables using ipset.
• Requires ipset and iptables installed (sudo apt install ipset iptables).

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🛠️ Installation

1️⃣ Install via PyPI

pip install cidre-cli

2️⃣ Alternative: clone the repository

git clone https://github.com/vulnebify/cidre.git
cd cidre
python3 -m venv .venv
source .venv/bin/activate
pip install .

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⚡ Usage

1️⃣ Pull and compile CIDR ranges

Fetches the latest IP allocation data from all RIRs and compiles per-country CIDR blocks:

cidre pull --merge

• --merge: Merges overlapping IP ranges for efficiency.
• --proxy <proxy>: Proxies connection to RIRs.
• --cidr-store <path>: Specifies CIDRs' custom storage directory. Default ./output/cidr/{ipv4|ipv6}/{country_code}.cidr.

2️⃣ Action on countries

Allow|deny|reject specific countries' CIDR blocks in specified firewall:

cidre allow|deny|reject ru ir kp

• --firewall ufw|iptables: Firewall to apply rules. Default ufw.
• --cidr-store <path>: Specifies CIDRs' custom storage directory. Default ./output/cidr/{ipv4|ipv6}/{country_code}.cidr.

⚠️ NOTE: iptables firewall DO NOT persist rules by default

To ensure iptables and IPSet rules persist after a reboot, follow these steps:

# 1️⃣ Save rules based on the firewall method:
# - For iptables + IPSet:
sudo ipset save > /etc/ipset.rules
sudo iptables-save > /etc/iptables/rules.v4
sudo ip6tables-save > /etc/iptables/rules.v6

# 2️⃣ Restore firewall rules on boot:
# - For iptables + IPSet:
sudo bash -c 'echo "ipset restore < /etc/ipset.rules" >> /etc/rc.local'
sudo chmod +x /etc/rc.local

# 3️⃣ Reboot and verify:
sudo reboot
sudo ipset list
sudo iptables -L -v -n

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📄 License

This project is licensed under the MIT License.

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🙌 Inspired by

CIDRE was inspired by herrbischoff/country-ip-blocks and aims to provide an automated alternative with firewall integration.

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🤝 Contributions

PRs are welcome! Feel free to fork the repo and submit pull requests.

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📧 Contact

For any questions, open an issue or reach out via GitHub Discussions.