🔗 Squid 6

Jul 2025	Squid-6 series became DEPRECATED with the release of Squid-7 series
JUl 2023	Released for production use.

No more changes or releases will be done for the Squid-6 series.

🔗 Basic new features in 6.0:

• Major UI changes:
  • Remove 8K limit for single access.log line
  • Add tls_key_log to report TLS communication secrets
• Minor UI changes:
  • Add %transport::>connection_id logformat code
  • Add paranoid_hit_validation directive
  • Report SMP store queues state (mgr:store_queues)
  • Addcache_log_message directive
• Developer Interest changes:
  • Replaced X-Cache and X-Cache-Lookup headers with Cache-Status
  • Reject HTTP/1.0 requests with unusual framing
  • codespell check added to source maintenance enforcement
  • Streamlined ./configure handling of optional libraries
  • Add –progress option to test-builds.sh
  • Remove layer-00-bootstrap from test script
  • Convert LRU map into a CLP map
  • Remove legacy context-based debugging in favor of CodeContext
• Removed features:
  • Remove unused cache_diff binary
  • Remove obsolete membanger test
  • Remove deprecated leakfinder (–enable-leakfinder)

Packages of Squid source code are available at https://www.squid-cache.org/Versions/

🔗 Security Advisories

See our Advisories list.

🔗 Open Bugs

• Major or higher bugs currently affecting this version.

  • Bugs against any older version can be closed if found fixed in 6.x

• Bugs new in this version

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