Internet Systems Consortium DHCP Distribution
- Version 4.4.2
- 22 January 2020
+ Version 4.4.3
+ 26 January 2022
Release Notes
NEW FEATURES
MPL 2.0. Please see https://www.mozilla.org/en-US/MPL/2.0/ to read the MPL 2.0
license terms.
-While release 4.4.2 is primarily a maintenance release that addresses a number
-of defects, it does introduce a few new features:
+NOTE: The client and relay components are reaching their End-Of-Life cycle.
+4.4.3 is the final release that features them.
-- Keama - Keama is a migration utility that assists in converting ISC DHCP
- server configuration files to Kea configuration files. It is found in the
- keama subdirectory and includes a README.md file with instructions on how
- to build it as well as a manpage on its usage.
+While release 4.4.3 is primarily a maintenance release that addresses a number
+of issues, it does introduce a few of small new features:
-- Two new server parameters related to ping checking were added:
+1. BIND libraries updated to the latest 9.11.36. This fixes a number of compilation
+ issues on various systems, including OpenWRT.
+ [gitlab #218, #171, #180, #192]
-1. ping-cltt-secs which allows the user to specify the number of seconds
- that must elapse since CLTT before a ping check is conducted.
+2. Improve PRNG initialization. There is now a new configure flag --with-randomdev=PATH
+ that specifies the device to read the initial seed from. That is typically
+ /dev/random (the default value) or /dev/urandom, but may be other as preferred on
+ your system. If this option is enabled, dhclient will use the file as a seed. If
+ not, the earlier algorithm (get last 4 bytes of hardware addresses from all network
+ interfaces that have them, use current time and process ID).
-2. ping-timeout-ms which allows the user to specify the amount of time the
- server waits for a ping-check response in milliseconds rather than in
- seconds.
+3. The IPv6-only preferred option, defined in RFC8925, is now supported.
+ [gitlab #132]
-In general, the areas of focus for ISC DHCP 4.4 were:
+4. Compilation fixed for gcc-10.
+ [gitlab #117]
-1. Dynamic DNS additions
-2. dhclient improvements
-3. Support for dynamic shared libraries
+5. Client fix: wrong argument to memcpy()
+ [gitlab #190]
-Dynamic DNS Improvements:
-
-- We added three new server configuration parameters which influence DDNS
- conflict resolution:
-
- 1. ddns-dual-stack-mixed-mode - alters DNS conflict resolution behavior
- to mitigate issues with non-compliant clients in dual stack environments.
-
- 2. ddns-guard-id-must-match - relaxes the DHCID RR client id matching
- requirement of DNS conflict resolution.
-
- 3. ddns-other-guard-is-dynamic - alters dual-stack-mixed-mode behavior to
- allow unguarded DNS entries to be overwritten in certain cases
-
-- The server now honors update-static-leases parameter for static DHCPv6
- hosts.
-
-dhclient Improvements:
-
- - We've added three command line parameters to dhclient:
-
- 1. --prefix-len-hint - directs dhclient to use the given length as
- the prefix length hint when requesting prefixes
-
- 2. --decline-wait-time - instructs the client to wait the given number
- of seconds after declining an IPv4 address before issuing a discover
-
- 3. --address-prefix-len - specifies the prefix length passed by dhclient
- into the client script (via the environment variable ip6_prefixlen) with
- each IPv6 address. We added this parameter because we have changed the
- default value from 64 to 128 in order to be compliant with RFC3315bis
- draft (-09, page 64) and RFC5942, Section 4, point 1.
- **WARNING**: The new default value of 128 may not be backwardly compatible
- with your environment. If you are operating without a router, such as
- between VMs on a host, you may find they cannot see each other with prefix
- length of 128. In such cases, you'll need to either provide routing or use
- the command line parameter to set the value to 64. Alternatively you may
- change the default at compile time by setting DHCLIENT_DEFAULT_PREFIX_LEN
- in includes/site.h.
-
- - dhclient will now generate a DHCPv6 DECLINE message when the client script
- indicates a DAD failure
-
-Dynamic shared library support:
-
- Configure script, configure.ac+lt, which supports libtool is now provided
- with the source tar ball. This script can be used to configure ISC DHCP
- to build with libtool and thus use dynamic shared libraries.
-
-Other Highlights:
-
- - The server now supports dhcp-cache-threshold for DHCPv6 operations
- - The server now supports DHPv6 address allocation based on EUI-64 DUIDs
- - Experimental support for alternate relay port in the both the server
- and relay for IPv4, IPv6 and 4o6 (see: draft-ietf-dhc-relay-port-10.txt)
+6. The server's limit on the size of lease file that can be loaded at start up
+ is now only enforced on 32-bit systems.
+ [gitlab #64]
For information on how to install, configure and run this software, as
well as how to find documentation and report bugs, please consult the
Changes since 4.4.2 (New Features)
+- BIND9 version updated to latest 9.11.36. Thanks to Philip Prindeville
+ for testing on OpenWRT.
+ [Gitlab #218]
+
- Added support of the new DHCPv4 option v6-only-preferred specified
in RFC 8925. A new reason code, V6ONLY, was added to the client script
and the client Linux script sample was updated.
- The limit on the size of lease file that can be loaded at start up
is now only enforced on 32-bit systems.
- [Gitlab #64]
+ [Gitlab #92]
- After a report about predictable seeding of transaction identifier
pseudo-random generation on systems where process identifiers are not
convenient on all systems.
[Gitlab #197]
+- Minor dhclient code fix to remove compilation warnings.
+ [Gitlab #190]
+
+- Removed hard-coded MD5 algorithm name in OMAPI connection logic. Prior
+ to this using any other algorithm via key-algorithm statement would
+ allow OMAPI connections to made but subsequent actions such as updating
+ an object to fail.
+ [Gitlab #148]
+
Changes since 4.4.2b1 (Bug Fixes)
- Added a clarification on DHCPINFORMs and server authority to
projects / thirdparty / dhcp.git / blobdiff