Updated: 28 September 2026 · Applies to: Cloudflare (Railgun discontinued 31 January 2024)

Railgun was a Cloudflare service that compressed traffic between Cloudflare and your server using a listener installed on the server. Cloudflare discontinued it on 31 January 2024; existing Railgun listeners no longer work and should be removed.

Remove an old Railgun listener

systemctl disable --now railgun      # or: service railgun stop
dnf remove railgun-stable             # AlmaLinux / Rocky (yum on CentOS)
apt remove railgun-stable             # Ubuntu / Debian

Also remove the Railgun repository file from /etc/yum.repos.d/ or /etc/apt/sources.list.d/, and close its port (2408) in the firewall.

What to use instead

  • Caching: Cloudflare's cache rules and Cache Reserve for static and cacheable pages, plus a page cache on your server.
  • Faster connections to your server: Cloudflare Argo Smart Routing (paid), or Cloudflare Tunnel, which also hides your server's IP.
  • Compression: enable Brotli/gzip on your server; Cloudflare compresses responses to visitors automatically.

Check that nothing is left running

ps aux | grep [r]g-listener
ss -tlnp | grep 2408

Both commands should print nothing. Remove the old configuration file /etc/railgun/railgun.conf if it is still there.

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