📦 Installation Command
apt install varnish
Varnish Cache Default Port & Configuration
varnish systemctl: varnishHTTP accelerator and reverse proxy cache. Extremely fast, uses VCL for configuration.
🔌 Default Ports
6081
tcp
HTTP (client-facing)
6082
tcp
Management interface
⚙️ Configuration Files
/etc/varnish/default.vcl/etc/default/varnish/lib/systemd/system/varnish.service
📂 Default Directories
- config:
/etc/varnish - data:
N/A (memory cache) - logs:
/var/log/varnish - vcl:
/etc/varnish/default.vcl
🔐 Default Credentials
Username:N/A
Password:N/A
💡 Management interface uses secret file: /etc/varnish/secret
⚠️ Conflicts
✅ Works With
🛡️ Security Notes
Restrict management port to localhost, use secret authentication, purge only from trusted IPs, configure proper cache invalidation
❓ Frequently Asked Questions
What port does Varnish use?
Varnish uses port 6081 for HTTP and 6082 for admin/CLI by default.
What is Varnish used for?
Varnish is an HTTP accelerator that caches content to dramatically speed up websites.
Where is Varnish config?
VCL config at /etc/varnish/default.vcl, daemon config at /etc/default/varnish.