Source : https://www.isc.org/downloads/dhcp/
All IP devices need addresses, and ISC DHCP is the easiest and most efficient way to provide them. ISC DHCP is open source software that implements the Dynamic Host Configuration Protocol for connection to an IP network. It is production-grade software that offers a complete solution for implementing DHCP servers, relay agents, and clients for small local networks to large enterprises. ISC DHCP solution supports both IPv4 and IPv6, and is suitable for use in high-volume and high-reliability applications.
Le protocole DHCP (Dynamic Host Configuration Protocol (en) : « Protocole de configuration dynamique des hôtes » (fr)) est un service réseau TCP/IP. Il permet aux ordinateurs clients l'obtention automatique d'une configuration réseau. Il évite la configuration de chaque ordinateur manuellement. Les ordinateurs configurés pour utiliser DHCP n'ont pas le contrôle de leur configuration réseau qu'ils reçoivent du serveur DHCP. La configuration est totalement transparente pour l'utilisateur.
[/opt/ISCDHCP/bin] # ./dhcpd --help Internet Systems Consortium DHCP Server 4.3.3-P1 Copyright 2004-2016 Internet Systems Consortium. All rights reserved. Usage: dhcpd [-p <UDP port #>] [-f] [-d] [-q] [-t|-T] [-4|-6] [-cf config-file] [-lf lease-file] [-tf trace-output-file] [-play trace-input-file] [-pf pid-file] [--no-pid] [-s server] [if0 [...ifN]] If you think you have received this message due to a bug rather than a configuration issue please read the section on submitting bugs on either our web page at www.isc.org or in the README file before submitting a bug. These pages explain the proper process and the information we find helpful for debugging.. exiting.
Internet Systems Consortium DHCP Client 4.2.7 Copyright 2004-2014 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Usage: dhclient [-4|-6] [-SNTP1dvrx] [-nw] [-p <port>] [-D LL|LLT] [-s server-addr] [-cf config-file] [-lf lease-file] [-pf pid-file] [--no-pid] [-e VAR=val] [-sf script-file] [interface] If you did not get this software from ftp.isc.org, please get the latest from ftp.isc.org and install that before requesting help. If you did get this software from ftp.isc.org and have not yet read the README, please read it before requesting help. If you intend to request help from the dhcp-bugs at isc.org mailing list, please read the section on the README about submitting bug reports and requests for help. Please do not under any circumstances send requests for help directly to the authors of this software - please send them to the appropriate mailing list as described in the README file. exiting.
Usage: dhcrelay [-4] [-d] [-q] [-a] [-D] [-A <length>] [-c <hops>] [-p <port>] [-pf <pid-file>] [--no-pid] [-m append|replace|forward|discard] [-i interface0 [ ... -i interfaceN] server0 [ ... serverN] dhcrelay -6 [-d] [-q] [-I] [-c <hops>] [-p <port>] [-pf <pid-file>] [--no-pid] -l lower0 [ ... -l lowerN] -u upper0 [ ... -u upperN] lower (client link): [address%]interface[#index] upper (server link): [address%]interface
Fichier de conf administrable à travers l'interface Web du plugin
Sequence de démarrage et d'arrêt du plugin configurable à travers l'interface Web
The major "theme" for ISC DHCP 4.3.x was to update the support for DHCPv6 to include several of the features that have been available for DHCPv4. These include: - Support the use of classes - Support for on_commit, on_expiry and on_release statements - Better logging of address assignments - Support for using DHCPv6 relay options in expressions This release also adds suppport for the standard DDNS as described in the current RFCs as well as enhancing support for dynamically adding and removing subclasses via OMAPI. There are a number of DHCPv6 limitations and features missing in this release, which will be addressed in the future: - Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported. - DHCPv6 includes human-readable text in status code messages, in English. A method to reconfigure or support other languages would be preferable. - The "host-identifier" option is limited to a simple token. - The client and server can only operate DHCPv4 or DHCPv6 at a time, not both. To use both protocols simultaneously, two instances of the relevant daemon are required, one with the '-6' command line option. For information on how to install, configure and run this software, as well as how to find documentation and report bugs, please consult the README file. ISC DHCP uses standard GNU configure for installation. Please review the output of "./configure --help" to see what options are available. The system has only been tested on Linux, FreeBSD, and Solaris, and may not work on other platforms. Please report any problems and suggested fixes to <email@example.com>. ISC DHCP is open source software maintained by Internet Systems Consortium. This product includes cryptographic software written by Eric Young (firstname.lastname@example.org). Changes since 4.3.1rc1 - None Changes since 4.3.1b1 - Modify the linux and openwrt dhclient scripts to process information from a stateless request. Thanks to Jiri Popelka at Red Hat for the bug report and patch. [ISC-Bugs 36102] - Remove more unused RCSID tags. These weren't noticed in 4.3 as the code isn't used anymore but we remove them here to keep the code consistent across versions. [ISC-Bugs #36451] Changes since 4.3.0 - Tidy up several small tickets. Correct parsing of DUID from config file, previously the LL type was put in the wrong place in the DUID string. [ISC-Bugs #20962] Add code to parse "do-forward-updates" as well as "do-forward-update" Thanks to Jiri Popelka at Red Hat. [ISC-Bugs #31328] Remove log_priority as it isn't currently used. [ISC-Bugs #33397] Increase the size of the buffer used for reading interface information. [ISC-Bugs #34858] - Remove an extra set of the msg_controllen variable. [ISC-Bugs #21035] - Add a more understandable error message if a configuration attempts to add multiple keys for a single zone. Thanks to a patch from Jiri Popelka at Red Hat. [ISC-Bugs #31892] - Fix some minor issues in the dst code. [ISC-Bugs #34172] - Properly #ifdef functions so that the code can compile without NSUPDATE. [ISC-Bugs #35058] - Update the partner's stos (start time of state, basically when we last heard from this partner) field when updating the state in failover. [ISC-Bugs #35549] - Modify the overload processing to allow space for the remote agent ID. [ISC-Bugs #35569] Handle the ordering of the SUBNET_MASK option even if it is the last option in the list. [ISC-Bugs #24580] - Remove the code that allows a server to follow RFC3315 instead of the subsequent errata from August 2010 when determining which IAs to include if no addresses will be assigned. [ISC-Bugs #28938] - Remove unused RCSID tags. [ISC-Bugs #35846] - Correct the v6 client timing code. When doing the timing backoff for MRT limit it to MRD. Thanks to Jiri Popelka at Red Hat for the bug report and fix. [ISC-Bugs #21238 - Add a log entry when killing a client and remove the PID files when a server, relay or client are killed. [ISC-Bugs #16970] [ISC-Bugs #17258] - Some minor cleanups in the client code. In addition to checking for dhcpc check for bootpc in the services list. [ISC-Bugs #18933] Correct the client code to only try to get a lease once when the given the "-1" argument. Thanks to Jiri Popelka at Red Hat for the bug report and fix. [ISC-Bugs #26735] When asked for the version don't send the output to syslog. [ISC-Bugs #29772] Add the next server information to the environment variables for use by the client script. In order to avoid changing the client lease file the next server information isn't written to it. Thanks to Tomas Hozza at Red Hat for the suggestion and a prototype fix. [ISC-Bugs #33098] - Several updates to the dhcp server code. When not in quiet mode print out the files being used. [ISC-Bugs #17551] As accessing some pid files may require privileges move the dropping of permission bits due to the paranoia patch to be after the pid code. Thanks to Jiri Popelka at Red Hat for the bug report and fix. [ISC-Bugs #25806] When processing a "--version" request don't output the version information to syslog. - Add the "enable-log-pid" build option to the configure script. When enabled this causes the client, server and relay programs to include the PID number in syslog messages. Thanks to Marius Tomaschewski for the suggestion and proto-patch. [ISC-Bugs #29713] - Add a #define to specify the prefix length used when a client attempts to configure an address. This can be modified by editing includes/site.h. By default it is set to 64. While 128 might be a better choice it would also be a change for currently running systems, so we have left it at 64. [ISC-Bugs #DHCP-2] - Add a run time option to the client "-df" to allow the administrator to point to a second lease file the client can search for a DUID. This can be used to allow a v4 and a v6 instance of the client to share a DUID. The second file will only be searched if there isn't a DUID in the main lease file and the DUID will be written out to the main lease file. [ISC-Bugs #34886] - Have the client fsync the lease file to avoid lease corruption if the client hibernates or otherwise shuts down. [ISC-Bugs #35894] - Add a check for L2VLAN in bpf.c to help support VLAN interfaces Thanks to Steinar Haug for the suggestion. [ISC-Bugs #36033] - Modify the handling of the resolv.conf file to allow the DHCP process to start up even if the resolv.conf file has problems. [ISC-Bugs #35989] - Add threshold logging functionality. Two new options, log-threshold-low and log-threshold-high, indicate to the server if and when it should log an error message as addresses in a pool are used. [ISC-Bugs #34487] - Add code to properly dereference a pointer in the dhclient code on an error condition. [ISC-Bugs #36194] - Add code to help clean up soft leases. [ISC-Bugs #36304] - Disable the gentle shutdown functionality until we can determine the best way to present it to remove or reduce the side effects. [ISC-Bugs #36066] Changes since 4.3.0rc1 - None Changes since 4.3.0b1 - Tidy up receive packet processing. Thanks to Brad Plank of GTA for reporting the issue and suggesting a possible patch. [ISC-Bugs #34447] Changes since 4.3.0a1 - Modify the message displayed when a process hits a fatal error. The new message is much shorter and simply points to the README and our website for directions on bug submissions. [ISC-Bugs #24789] - Handle an absent resolv.conf file better. [ISC-Bugs #35194] Changes since 4.2.0 (new features) - If a client renews before 'dhcp-cache-threshold' percent of its lease has elapsed (default 25%), the server will reuse the allocated lease (provide a lease within the currently allocated lease-time) rather than extend or renew the lease. This absolves the server of needing to perform an fsync() operation on the lease database before reply, which improves performance. [ISC-Bugs #22228] Updated this patch to support asynchronous DDNS. If the server is attempting to do DDNS on a lease it should be udpated and written to disk even if that wouldn't be necessary due to the thresholding. [ISC-Bugs #26311] - The 'no available billing' log line now also logs the name of the last matching billing class tried before failing to provide a billing. [ISC-Bugs #21759] - A problem with missing get_hw_addr function when --enable-use-sockets was used is now solved on GNU/Linux, BSD and GNU/Hurd systems. Note that use-sockets feature was not tested on those systems. Client and server code no longer use MAX_PATH constant that is not defined on GNU/Hurd systems. [ISC-Bugs #25979] - Add a perl script in the contrib directory, dhcp-lease-list.pl, which can parse v4 lease files and output the lease information in a more human friendly manner. This was written by Christian Hammers with some updates by vom and ISC. This is contributed code and is not supported by ISC; however it may be useful to some users. [ISC-Bugs #20680] - Add support in v6 for on-commit, on-expire and on-release. [ISC-Bugs #27912] - Add support for using classes with v6. [ISC-Bugs #26510] - Update the DDNS code to current standards and allow for sharing of DDNS entries between v4 and v6 clients. The new code is used if the ddns-update-style is set to "standard", the older code is still available if ddns-update-style is set to "interim". The oldest DDNS code "ad-hoc" has been removed. Thanks to Thomas Pegeot who submitted a patch for this issue. This patch is based on that work with some modifications. [ISC-Bugs #21139] - Add a configuration option to the server to suppress using fsync(). Enabling this option will mean that fsync() is never called. This may provide better performance but there is also a risk that a lease will not be properly written to the disk after it has been issued to a client and before the server stops. Using this option is not recommended. [ISC-Bugs #34810] - Add some logging statements to indicate when the server is ready to serve. One statement is emitted after the server has finished reading its files and is about to enter the dispatch loop. This is "Server starting service.". The second is emitted when a server determines that both it and its failover peer are in the normal state. This is "failover peer <name>: Both servers normal." [ISC-Bugs #33208] - Add support for accessing options from v6 relays. The v6relay statement allows the administrator to choose which relay to use when searching for an option, see the dhcp-options man page for a description. The host-identifier option has also been updated to support the use of relay options, see the dhcpd.conf man page for a description. [ISC-Bugs #19598] - When doing DDNS if there isn't an appropriate zone statement attempt to find a reasonable nameserver via a DNS resolver. This restores some functionality that was lost in the transition to asynchronous DDNS. Due to the lack of security and increase in fragility of the system when using this feature we strongly recommend the use of appropriate zone statements rather than using this functionality. [ISC-Bugs #30461] - Add support for specifying the address from which to send DDNS updates on the DHCP server. There are two new options "ddns-local-address4" and "ddns-local-address6" that each take one instance of their respective address types. [ISC-Bugs #34779] - Add ignore-client-uids option in the server. This option causes the server to not record a client's uid in its lease. This violates the specification but may also be useful when a client can dual boot using different client ids but the same mac address. Thank you to Brian De Wolf at Cal Poly Pomona for the patch. [ISC-Bugs #32427] [ISC-Bugs #35066] - Extend the DHCPINFORM processing to honor the subnet selection option and take host declarations into account. Thanks to Christof Chen for testing and submitting the patch. [ISC-Bugs #35015] - Extend the hardware expression to look into the lease structure for a hardware address if there is no packet. This allows the server to find the hardware address during on-expiry processing. [ISC-Bugs #24584] - Add definitions for some options that have been specified by the IETF. [ISC-Bugs #29268] [ISC-Bugs #35198]