Version 2.4.0

Features:

• New unified LMDB-based zone journal
• Server statistics support
• New statistics module for traffic measuring
• Automatic deletion of retired DNSSEC keys
• New control logging category

Improvements:

• Lower memory consumption with qp-trie
• Zone events and zone timers improvements
• Print all zone names in the FQDN format
• Simplified query module interface
• Shared TCP connection between SOA query and transfer
• Response Rate Limiting as a module with statistics support
• Key filters in keymgr

Bugfixes:

• False positive semantic-check warning about invalid bitmap in NSEC
• Unnecessary SOA queries upon notify with up to date serial
• Timers for expired zones are reset on reload
• Zone doesn't expire when the server is down
• Failed to handle keys with duplicate keytags
• Per zone module and global module insconsistency
• Obsolete online signing module configuration
• Malformed output from kjournalprint
• Redundant SO_REUSEPORT activation on the TCP socket
• Failed to use higher number of background workers

Full Knot DNS 2.4.0 changelog