Sourced from dnspython's changelog.

2.4.2

• Async queries could wait forever instead of respecting the timeout if the timeout was 0 and a packet was lost. The timeout is now respected.

• Restore HTTP/2 support which was accidentally broken during the https refactoring done as part of 2.4.0.

• When an inception time and lifetime are specified, the signer now sets the expiration to the inception time plus lifetime, instead of the current time plus the lifetime.

2.4.1

• Importing dns.dnssecalgs without the cryptography module installed no longer causes an ImportError.

• A number of timeout bugs with the asyncio backend have been fixed.

• DNS-over-QUIC for the asyncio backend now works for IPv6.

• Dnspython now enforces that the candidate DNSKEYs for DNSSEC signatures have protocol 3 and have the ZONE flag set. This is a standards compliance issue more than a security issue as the legitimate authority would have to have published the non-compliant keys as well as updated their DS record in order for the records to validate (the DS digest includes both flags and protocol). Dnspython will not make invalid keys by default, but does allow them to be created and used for testing purposes.

• Dependency specifications for optional features in the package metadata have been improved.

2.4.0

• Python 3.8 or newer is required.

• The stub resolver now uses instances of dns.nameserver.Nameserver to represent remote recursive resolvers, and can communicate using DNS over UDP/TCP, HTTPS, TLS, and QUIC. In additional to being able to specify an IPv4, IPv6, or HTTPS URL as a nameserver, instances of dns.nameserver.Nameserver are now permitted.

• The DNS-over-HTTPS bootstrap address no longer causes URL rewriting.

• DNS-over-HTTPS now only uses httpx; support for requests has been dropped. A source port may now be supplied when using httpx.

• DNSSEC zone signing with NSEC records is now supported. Thank you

... (truncated)

• 5278eb3 update whatsnew for 2.4.2
• ef4fab1 Ensure async https() requests are bounded in total time
• 60df484 test inception, expiration, and lifetime when signing
• 6c79315 DNSSEC rrsig_expiration calculation (#977)
• b79e30e 2.4.2 prep
• 52c2dc1 Fix unintended "wait forever" behavior with zero timeouts #976.
• 1d9651c Use HTTP2 when possible in https() #973.
• 5486533 revert dependabot sphinx change as it is too recent for RTD
• 80b3a2c Bump sphinx from 4.3.2 to 7.1.0 (#967)
• ed822ee 2.4.1 versioning
• Additional commits viewable in compare view

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