Exil IPFilter Updater vs Alternatives — Which IP blocklist tool to Choose?

How to Configure Exil IPFilter Updater for Automatic Blocklists

Overview

Exil IPFilter Updater automates downloading and applying IP blocklists to the IPFilter firewall. The goal is to keep blocklists current without manual steps so unwanted IPs are blocked promptly.

Prerequisites

• A system with IPFilter installed and running (e.g., FreeBSD, NetBSD, Solaris, some Linux setups).
• Exil IPFilter Updater package or script installed (assume updater is placed at /usr/local/sbin/exil-updater).
• Network connectivity to fetch blocklists.
• Sufficient privileges (root) to update firewall rules and reload IPFilter.

Typical configuration steps

1. Install updater and dependencies

   • Place the updater executable/script in a standard location: /usr/local/sbin/exil-updater
   • Ensure required utilities exist: curl or wget, tar/gzip, sha256sum (if checksums used), and ipf command.
   • Make it executable:

     Code
     Copy CodeCopied
     chmod +x /usr/local/sbin/exil-updater 

2. Create a configuration file

   • Common path: /etc/exil-updater.conf
   • Key settings:
     • List URLs (one per source) — blocklist download endpoints.
     • Local cache directory (e.g., /var/cache/exil-updater).
     • Combined output path where the final IPFilter ruleset will be written (e.g., /etc/ipf/exil-blocklist.ipf).
     • Backup directory for previous lists.
     • Checksum or signature verification options.
     • Logging level and log file path.

   Example minimal config (adjust paths and URLs):

   Code
   Copy CodeCopied
   sources=( “https://example.com/blocklists/ipblock1.txt”
     “https://another.example/blocklist2.gz”
   ) cache_dir=“/var/cache/exil-updater” output=“/etc/ipf/exil-blocklist.ipf” backupdir=“/var/backups/exil-updater” 

3. Fetch and process lists

   • The updater should download each source, decompress if needed, normalize formats (CIDR or single IP), remove duplicates, and optionally filter out private/reserved ranges.
   • Ensure the script validates files (size and checksum) to avoid corrupted inputs.

4. Convert to IPFilter rules

   • Typical rule format examples:
     • block in quick from 1.2.3.⁄₃₂ to any
     • block in quick from 203.0.113.0/24 to any
   • The updater should generate rules wrapped with comments and timestamps, e.g.:

     Code
      ffON2NH02oMAcqyoh2UU MQCbz04ET5EljRmK3YpQ CPXAhl7VTkj2dHDyAYAf” data-copycode=“true” role=“button” aria-label=“Copy Code”>Copy CodeCopied
     # Exil IPFilter Updater — generated 2026-03-04 block in quick from 1.2.3.4 to any … 

5. Install/update rules atomically

   • Write the generated rules to a temporary file, validate syntax with ipf -Fa -f (or a safe test command), then move into place and reload:

     Code
     Copy CodeCopied
     ipf -Fa -f /etc/ipf/exil-blocklist.ipf service ipfilter reload   # or ipfctl commands per system 

   • Backup previous rules before replacing.

6. Scheduling automatic updates

   • Use cron (or systemd timer) to run regularly. Example daily cron:

     Code
     Copy CodeCopied
     0 3 * * * /usr/local/sbin/exil-updater –config /etc/exil-updater.conf >> /var/log/exil-updater.log 2>&1 

   • For frequent updates, consider every hour; balance update frequency against system load and rule size.

7. Monitoring and maintenance

   • Log successes/failures and alert on repeated failures.
   • Rotate logs and prune old cached lists.
   • Periodically review list sources for reliability or false positives.
   • Test on a staging host before deploying wide changes.