DYNDNS(1)						  Perl Dynamic DNS Update Client						 DYNDNS(1)

NAME

       dyndns - Update IP address to dynamic DNS (DDNS) provider

SYNOPSIS

	   dyndns --login LOGIN --password PASSWORD 
		  --host yourhost.dyndns.org

DESCRIPTION

       A cross platform Perl client for updating dynamic DNS IP information at supported providers (see "--provider"). By Default this program
       expects www.dyndns.org provider.

       The dynamic DNS services allow mapping a dynamic IP address to a static hostname. This way the host can be refered by name instead of the
       changing IP address from the ISP's pool. Some DDNS providers offer a single account and a single host namefree of charge. Please check the
       information from the Providers' pages.

       Separate files are used for remembering the last IP address to prevent updating the same IP address again. This is necessary in order to
       comply guidelines of the providers where multiple updates of the same IP address could cause your domain to be blocked. You should not
       normally need to touch the files where the IP addresses are stored.

       If you know what you are doing and desperately need a forced update, delete the IP files and start program with apropriate arguments.
       Without the information about previous IP address, program sends a new update request to the provider.

       Program has been designed to work under any version of Windows or Linux, possibly Mac OS included. It may not work under other Unix/BSD
       variants. Please see BUGS section how to provide details to add support for other operating systems.

       Visit the page of the provider and create an account. Write down the login name, password and host name you registered.

       For Windows operating systems, you need to install Perl. There are two Perl incarnatons: Native Windows version (Activestate Perl) and
       Cygwin version. The "http://www.cygwin.com/" is recommended as it more closely follows the original Perl environment.

OPTIONS

   Gneneral options
       --config=FILE [--config=FILE ...]
	   List of configuration files to read. No command line options other than --verbose, --debug or --test should be appended or results are
	   undefined. Each file must contain complete DDNS account configuration.

	   The FILE part will go through Perl's "glob()" function, meaning that the filenames are expanded. Series of configuration files can be
	   run at once e.g. within directory "/etc/dyndns/" by using a single option. The order of the files processed is alphabetical:

	       --config=/etc/dyndns/*

	   See section CONFIGURATION FILE for more information how to write the files.

       --host=host1 [--host=host2 ...]
	   Use registered HOST(s).

       --group GROUP
	   This option is only for --provider noip

	   Assign IP to GROUP. Do you have many hosts that all update to the same IP address? Update a group instead of a many hosts.

       --login LOGIN
	   DDNS account's LOGIN name.

       --mxhost MX-HOST-NAME
	   This option is only for --provider dyndns

	   Update account information with MX hostname. Specifies a Mail eXchanger for use with the host being modified. Must resolve to an static
	   IP address, or it will be ignored. If you don't know DNS, don't touch this option.

	   The servers you list need to be correctly configured to accept mail for your hostname, or this will do no good. Setting up a server as
	   an MX without permission of the administrator may get them angry at you. If someone is contacted about such an infraction, your MX
	   record will be removed and possibly further action taken to prevent it from happening again. Any mail sent to a misconfigured server
	   listed as an MX may bounce, and may be lost.

       --mx-option
	   This option is only for --provider dyndns

	   Turn on MX option. Request that the MX in the previous parameter be set up as a backup. This means that mail will first attempt to
	   deliver to your host directly, and will be delivered to the MX listed as a backup.

	   Note regarding provider "noip":

	   Update clients cannot change this value. Clients can only submit requests to the php script to update the A record. Changes such as MX
	   records must be done through website.

       --offline
	   If given, set the host to offline mode.

	   "Note:" [dyndns] This feature is only available to donators. The "!donator" return message will appear if this is set on a non-donator
	   host.

	   This is useful if you will be going offline for an extended period of time. If someone else gets your old IP your users will not go to
	   your old IP address.

       --password PASSWORD
	   DDNS account's PASSWORD.

       --system {dyndns|statdns|custom}
	   This option is only for --provider dyndns

	   The system you wish to use for this update. "dyndns" will update a dynamic host, "custom" will update a MyDynDNS Custom DNS host and
	   "statdns" will update a static host. The default value is "dyndns" and you cannot use other options (statdns|custom) unless you donate
	   and gain access to the more advanced features.

	   See the DDNS provider's pages for more information.

       --wildcard
	   Turn on wildcard option. The wildcard aliases "*.yourhost.ourdomain.ext" to the same address as "yourhost.ourdomain.ext"

   Additional options
       -D, --daemon [WAIT-MINUTES]
	   Enter daemon mode. The term "daemon" refers to a standalone processes which keep serving until killed. In daemon mode program enters
	   into infinite loop where IP address changes are checked periodically. For each new ip address check, program waits for WAIT-MINUTES.
	   Messages in this mode are reported using syslog(3); if available.

	   This option is designed to be used in systems that do not provide Unix-like cron capabilities (e.g under Windows OS). It is better to
	   use cron(8) and define an entry using crontab(5) notation to run the update in periodic intervals. This will use less memory when Perl
	   is not permanently kept in memory like it would with option --daemon.

	   The update to DDNS provider happens only if

	       1) IP address changes
	       2) or it has taken 30 days since last update.
		  (See DDNS providers' account expiration time documentation)

	   The minimum sleep time is 5 minutes. Program will not allow faster wake up times(*). The value can be expressed in formats:

	       15      Plain number, minutes
	       15m     (m)inutes. Same sa above
	       1h      (h)ours
	       1d      (d)days

	   This options is primarily for permanent Internet connection. If you have a dial-up connection, it is better to arrange the IP update at
	   the same time as when the connection is started. In Linux this would happen during ifup(1).

	   (*) Perl language is CPU intensive so any faster check would put considerable strain on system resources. Normally a value of 30 or 60
	   minutes will work fine in most cases. Monitor the ISP's IP rotation time to adjust the time in to use sufficiently long wake up times.

       --ethernet [CARD]
	   In Linux system, the automatic IP detection uses program ifconfig(1). If you have multiple network cards, select the correct card with
	   this option. The default device used for query is "eth0".

       --file PREFIX
	   Prefix where to save IP information. This can be a) a absolute path name to a file b) directory where to save or c) directory + prefix
	   where to save.  Make sure that files in this location do not get deleted. If they are deleted and you happen to update SAME ip twice
	   within a short period - according to www.dyndns.org FAQ - your address may be blocked.

	   On Windows platform all filenames must use forward slashs like "C:/somedir/to/", not "C:somedir	o".

	   The PREFIX is only used as a basename for supported DDNS accounts (see --provider). The saved filename is constructed like this:

	      PREFIX<ethernet-card>-<update-system>-<host>-<provider>.log
				     |
				     See option --system

	   A sample filename in Linux could be something like this if PREFIX were set to "/var/log/dyndns/":

	       /var/log/dyndns/eth0-statdns-my.dyndns.org-dyndns.log

       -f, --file-default
	   Use reasonable default for saved IP file PREFIX (see --file). Under Windows, %WINDIR% is used. Under Linux the PREFIXes searched are

	       /var/log/dyndns/     (if directory exists)
	       /var/log/	    (system's standard)
	       $HOME/tmp or $HOME   If process is not running under root

	   This options is by default activated if --file is not in use.

       --proxy HOST
	   Use HOST as outgoing HTTP proxy.

       -P, --provider TYPE
	   By default, program connects to "dyndns.org" to update the dynamic IP address. There are many free dynamic DNS providers are reported.
	   Supported list of TYPES in alphabetical order:

	       hnorg	   No domain name limists
			   Basic DDNS service is free (as of 2003-10-02)
			   http://hn.org/

	       dyndns	   No domain name limits.
			   Basic DDNS service is free (as of 2003-10-02)
			   http://www.dyndns.org/
			   See also http://members.dyndns.org/

	       noip	   No domain name limits.
			   Basic DDNS service is free (as of 2003-10-02)
			   http://www.no-ip.com/

	   NOTE: as of 2010, the support for sites of hnorg, noip is probably non-working due to changes in the interfaces. Please use only dyndns
	   at this time.

       --query
	   Query current IP address and quit. Note: if you use router, you may need --urlping* options, otherwise the IP address returned is your
	   subnet's DHCP IP and not the ISP's Internet IP.

	   Output of the command is at least two string. The second string is "last-ip-info-not-available" if the saved ip file name is not
	   specified.  In order to program to know where to look for saved IP files you need to give some --file* or --config option. The second
	   string can also be "nochange" if current IP address is same as what was found from saved file. Examples:

	       100.197.1.6 last-ip-info-not-available
	       100.197.1.6 100.197.1.7
	       100.197.1.6 nochange 18
				    |
				    How many days since last saved IP

	   Note for tool developers: additional information may be provided in future. Don't rely on the count of the output words, but instead
	   parse output from left to right.

       --query-ipchanged ['exitcode']
	   Print message if IP has changed or not. This option can take an optional string argument "exitcode" which causes program to indicate
	   changed ip address with standard shell status code (in bash shell that would available at variable $?):

	       $ dyndns --query-ipchange exitcode --file-default 
		 --provider dyndns --host xxx.dyndns.org
	       $ echo $?

	       ... the status code of shell ($?) would be:

	       0   true value, changed
	       1   false value, error code, i.e. not changed

	   Without the "exitcode" argument, the returned strings are:

			   Current IP address
			   |
	       changed	35 111.222.333.444
	       nochange 18
			|
			Days since last IP update. Based on saved IP file's
			time stamp.

	   If the last saved IP file's time stamp is too old, then even if the IP were not really changed, the situation is reported with word
	   "changed". This is due to time limits the DDNS providers have. The account would expire unless it is updated in NN days.

	   Note for tool developers: additional information may be provided in future. Don't rely on the count of the output words, but instead
	   parse output from left to right.

       --query-ipfile
	   Print the name of the IP file and quit.

	   Note: In order for this option to work, you must supply all other options would be normally pass to update the DDNS account, because
	   the Ip filename depends on these options. Alternatively provide option --config FILE from where all relevant information if read.

	       --ethernet      [optional, defaults to eth0]
	       --provider      [optional, defaults to dyndns]
	       --system        [optional, defaults to dyndns]
	       --host	       required.

	   Here is an example which supposed that directory "/var/log/dyndns/" already exists:

	       $ dyndns --file-default --query-ipfile 
		 --provider dyndns --host xxx.dyndns.org
	       /var/log/dyndns/eth0-dyndns-dyndns-xxx-dyndns.org.log

       --regexp REGEXP
	   In host, which has multiple netword cards, the response can include multiple IP addresses. The default is to pick always the first
	   choice, but that may not be what is wanted. The regexp MUST not contain capturing parentheses: if you need one, use non-capturing
	   choice (?:). Refer to Perl manual page "perlre" for more information about non-cpaturing regular expression parentheses.

	   Here is an example from Windows:

	       Ethernet adapter {3C317757-AEE8-4DA7-9B68-C67B4D344103}:

		   Connection-specific DNS Suffix  . :
		   Autoconfiguration IP Address. . . : 169.254.241.150
		   Subnet Mask . . . . . . . . . . . : 255.255.0.0
		   Default Gateway . . . . . . . . . :

	       Ethernet adapter Local Area Connection 3:

		   Connection-specific DNS Suffix  . : somewhere.net
		   IP Address. . . . . . . . . . . . : 193.10.221.45
		   Subnet Mask . . . . . . . . . . . : 255.255.0.0
		   Default Gateway . . . . . . . . . : 10.10.0.101

	   The 193.10.221.45 is the intended dynamic IP address, not the first one.  To instruct searching from somewhere else in the listing,
	   supply a regular expressions that can match a portion in the listing after which the IP address appears. In the above case, the regexp
	   could be:

	       --regexp "Connection 3:"

	   In Windows, the words that follow "IP Address" are automatically expected, so you should not add them to the regexp.

	   In FreeBSD 4.5, you may get following response:

	       tun0: flags <UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492
		   inet6 fe80::250:4ff:feef:7998%tun0 prefixlen 64 scopeid 0x7
		   inet 62.214.33.49 --> 255.255.255.255 netmask 0xffffffff
		   inet 62.214.32.12 --> 255.255.255.255 netmask 0xffffffff
		   inet 62.214.35.49 --> 255.255.255.255 netmask 0xffffffff
		   inet 62.214.33.163 --> 62.214.32.1 netmask 0xff000000
		   Opened by PID 64

	   The correct IP address to pick from the listing is the one, which does not contain netmask 0xffffffff. The picked address for above is
	   therefore 62.214.33.163. The regexp that finds that line is:

	       --regexp ".*0xffffffff.*?inet"
			  |	       |
			  |	       Search minimum match until word "inet"
			  search maximum match

	   This will match all the way until the the last line with netmask 0xffffffff, after which shortest match ".*?" to "inet" is reached to
	   read the number following it. The regexp must make sure that the next word after its match point is the wanted address.

   Cable, DSL and router options
       If you do not have direct access to world known "real" IP address, but to a subnet IP address, then you cannot determine your outside world
       IP address from your machine directly. See picture below:

			       router/subnet			Internet
			      +-------------+		     +-----------+
	  Your PC:	      | 	    | maps address   |		 |
	  connect to ISP -->  | ROUTER	    | -------------> |		 |
			      | 192.168.... |		     | 80.1.1.1  |
	  local ip says:      +-------------+		     +-----------+
	  192.168.xxx.xxx				     THE REAL IP

       ASDL and cable modem and other connections may not be directly connected to Internet, but to a router to allow subnnetting internal hosts.
       This makes several computers to access the Internet while the ISP has offered only one visible IP address to you. The router makes the
       mapping of the local subnet IP to the world known IP address, provided by the ISP when the connection was established.

       You need some way to find out what is the real IP is. The simplest way is to connect to a some web page, which runs a reverse lookup
       service which can show the connecting IP address.

       Note: the following web web page does not exists. To find a service that is able to display your IP address, do a google search. Let's say,
       that you found a fictional service "http://www.example.com/showip" and somewhere in the web page it reads:

	       Your IP address is: 212.111.11.10

       This is what you need. To automate the lookup from web page, you need to instruct the program to connect to URL page and tell how to read
       the ip from page by using a regular expression. Consult Perl's manual page "perlre" if you are unfamiliar with the regular expressions. For
       the above fictional service, the options needed would be:

	   --urlping	     "http://showip.org/?showit.pl"
	   --urlping-regexp  "address is:s+([d.]+)"
					 |  ||
					 |  |+- Read all digits and periods
					 |  |
					 |  +- capturing parentheses
					 |
					 +- expect any number of whitespaces

       NOTE: The text to match from web page is not text/plain, but text/html, so you must look at the HTML page's sources to match the IP address
       correctly without the bold <b> tags etc.

       --urlping URL
	   Web page where world known IP address can be read. If you find a Web server that is running some program, which can show your IP
	   addres, use it. The example below connects to site and calls CGI program to make show the connector's IP address. Be polite. Making
	   calls like this too often may cause putting blocks to your site.

	       http://www.dyndns.org/cgi-bin/check_ip.cgi

	   Be sure to use period of 60 minutes or more with --daemon option to not increase the load in the "ping" site and cause admin's to shut
	   down the service.

       --urlping-dyndns
	   Contact http://www.dyndns.org service to obtain IP address information. This is shorthand to more general optiopn --urlping.

       --urlping-linksys [TYPE]
	   Specialized router option for Linksys products.

	   This option connects to Linksys Wireless LAN 4-point router, whose page is by default at local network address
	   -<http://192.168.1.1/Status.htm>. The world known IP address (which is provided by ISP) is parsed from that page. The product is
	   typically connected to the cable or DSL modem. Refer to routing picture presented previously.

	   If the default login and password has been changed, options --urlping-login and --urlping-password must be supplied

	   For TYPE information, See <http://www.linksys.com/>. Products codes currently supported include:

	    - BEFW11S4, Wireless Access Point Router with 4-Port Switch.
	      Page: http://192.168.1.1/Status.htm
	    - WRT54GL, Wireless WRT54GL Wireless-G Broadband Router.
	      Page: http://192.168.1.1/Status_Router.asp

       --urlping-login LOGIN
	   If "--urlping" web page requires authentication, supply user name for a secured web page.

       --urlping-password LOGIN
	   If "--urlping" web page requires authentication, supply password for a secured web page.

       --urlping-regexp REGEXP
	   After connecting to page with --urlping URL, the web page is examined for REGEXP. The regexp must catch the IP to perl match $1. Use
	   non-capturing parenthesis to control the match as needed. For example this is incorrect:

	       --urlping-regexp "(Address|addr:)s+([0-9.]+)"
				 |		   |
				 $1		   $2

	   The match MUST be in "$1", so you must use non-capturing perl paentheses for the first one:

	       --urlping-regexp "(?:Address|addr:) +([0-9.]+)"
				  |		    |
				  non-capturing     $1

	   If this option is not given, the default value is to find first word that matches:

	       ([0-9]+.[0-9]+.[0-9]+.[0-9]+)

   Miscellaneous options
       --debug [LEVEL]
	   Turn on debug with optional positive LEVEL. Use this if you want to know details how the program initiates connection or if you
	   experience trouble contacting DDNS provider.

       --help
	   Print help

       --help-html
	   Print help in HTML format.

       --help-man
	   Print help page in Unix manual page format. You want to feed this output to nroff -man in order to read it.

       --test [LEVEL]
	   Run in test mode, do not actually update anything. LEVEL 1 allows sending HTTP ping options and getting answers.

       --test-driver
	   This is for developer only. Run internal integrity tests.

       --test-account
	   This is for developer only. Uses DYNDNS test account options. All command line values that set host information or provider are
	   ignored. Refer to client page at http://clients.dyndns.org/devel

       --verbose
	   Print informational messages.

       --version
	   Print version and contact information.

EXAMPLES

       To update IP address periodically, use crontab(5) entry. The update will happen only if IP has changed since last time:

	   0 0-23 * * * perl <absolute path>/dyndns <options>

       To check current IP address:

	 dyndns --query [--urlping...]
			|
			Select correct option to do the "ping" for IP

       Show where the ip file is/would be stored with given connect options.  The option --file-default uses OS's default directory structure.

	 dyndns --file-default --query-ipfile --provider dyndns 
		 --host xxx.dyndns.org

       To upate account information to DDNS provider:

	 dyndns --provider dyndns --login <login> --password <pass> --host your.dyndns.org

       If your router can display a web page containing the world known IP address, you can instruct to "ping" it. Suppose that router is at
       address 192.168.1.1 and page that displays the world known IP is "status.html", and you have to log in to the router using username "foo"
       and password "bar":

	 dyndns --urlping http://192.168.1.1/Status.html 
		--urlping-login foo			 
		--urlping-pass	bar			 

       If the default regexp does not find IP address from the page, supply your own match with option --urlping-regexp. In case of doubt, add
       option --debug 1 and examine the responses. In serious doubt, contact the maintainer (see option --version) and send the full debug output.

       Tip: if you run a local web server, provider "www.dyndns.org" can direct calls to it. See option "--wildcard" to enable `*.your.dyndns.org'
       domain delegation, like if it we accessed using `www.your.dyndns.org'.

CONFIGURATION FILE

       Instead of supplying options at command line, they can be stored to a configuration file. For each DDNS account and different domains, a
       separate configuration file must be created. The configuration files are read with option --config.

       The syntax of the configuration file includes comments that start with (#).  Anything after hash-sign is interpreted as comment. Values are
       set in KEY = VALUE fashion, where spaces are non-significant. Keys are not case sensitive, but values are.

       Below, lines marked with [default] need only be set if the default value needs to be changed. Lines marked with [noip] or [dyndns] apply to
       only those providers' DDNS accounts. Notice that some keys, like "host", can take multple values seprated by colons. On/Off options take
       values [1/0] respectively. All host name values below are fictional.

	   # /etc/dyndns/dyndns.conf

	   #  Set to "yes" to make this configuration file excluded
	   #  from updates.

	   disable  = no       # [default]

	   ethernet = eth0     # [default]
	   group    = mygourp  # Provider [noip] only.
	   host     = host1.dyndns.org, host1.dyndns.org

	   #   If you route mail. See dyndns.org documentation for details
	   #   how to set up MX records. If you know nothing about DNS/BIND
	   #   Don't even consider using this option. Misuse or broken
	   #   DNS at your end will probably terminate your 'free' dyndns contract.

	   mxhost   = mxhost.dyndns.org

	   #   Details how to get the world known IP address, in case the standard
	   #   Linux 'ifconfig' or Windows 'ipconfig' programs cannot be used. This
	   #   interests mainly Cable, DSL and router owners. NOTE: You may
	   #   not use all these options. E.g. [urlping-linksys4] is alternate
	   #   to [urlping] etc. See documentation.

	   urlping-linksys  = BEFW11S4
	   urlping-login    = joe
	   urlping-password = mypass

	   urlping	    = fictional.showip.org
	   urlping-regexp   = (?:Address|addr:)s+([0-9.]+)

	   #   Where IPs are stored. Directory name or Directory name with
	   #   additional file prefix. The directory part must exist. You could
	   #   say 'file = /var/log/dyndns/' but that's the default.

	   file     = default		   # Use OS's default location

	   #   The DDNS account details

	   login    = mylogin
	   password = mypass
	   provider = dyndns		   # [default]
	   proxy    = myproxy.myisp.net    # set only if needed for HTTP calls

	   #   Hou need this option only if you have multiple ethernet cards.
	   #   After which regexp the IP number appers in ifconfig(1) listing?

	   regexp   = .*0xffffffff.*?inet

	   #   What account are you using? Select 'dyndns|statdns|custom'

	   system   = dyndns		   # Provider [dyndns] only

	   #   Yes, delegate all *.mydomain.dyndns.org calls

	   wildcard = 1

	   # End of cnfiguration file

       See the details of all of these options from the corresponding command line option descriptions. E.g. option 'ethernet' in configuration
       file corresponds to --ethernet command line option. The normal configuration file for average user would only include few lines:

	   # /etc/dyndns/myhost.dyndns.org.conf

	   host 	    = myhost.dyndns.org
	   file 	    = default	   # Use OS's default location
	   login	    = mylogin
	   password	    = mypassword
	   provider	    = dyndns
	   system	    = dyndns	   # or 'statdns'
	   wildcard	    = 1 	   # Delegate *.mydomain.dyndns.org

	   # End of cnfiguration file

       TODO (write Debian daemon scripts) FIXME:

	   update-rc.d dyndns start 3 4 5 6    # Debian

SUPPORT REQUESTS

       For new Operating System, provide all relevant commands, their options, examples and their output which answer to following questions. The
       items in parentheses are examples from Linux:

	   - How is the OS detected? Send result of 'id -a', or if file/dir
	     structure can be used to detect the system. In Lunux the
	     existence of /boot/vmlinuz could indicate that "this is a Linux
	     OS".
	   - What is the command to get network information (commandlike 'ifconfig')
	   - Where are the system configuration files stored (in directory /etc?)
	   - Where are the log files stored (under /var/log?)

       To add support for routers that can be connected through HTTP protocol or with some other commands, please provide connection details and
       full HTTP response:

	 wget -O <route-model>-dump.html http://192.168.1.0/your-network/router/page.html

TROUBLESHOOTING

       1. Turn on --debug to see exact details how the program runs and what HTTP requests are sent and received.

       2. Most of the <--query> options can't be used standalone. Please see documentation what additional options you need to supply with them.

ENVIRONMENT

       TMPDIR
	   Directory of temporary files. Defaults to system temporary dir.

FILES

       Daemon startup file

	   /etc/default/dyndns

       In Linux the syslog message files are:

	   /etc/syslog.conf	    daemon.err daemon.warning
	   /var/log/daemon.log

       There is no default location where program would search for configuration files. Configuration files may be found in directory
       "/etc/dyndns/examples". It is recommended that the examples are modified and copied one directorory up in order to use option --config
       /etc/dyndns/*.

       If program is run with Windows Activestate Perl, the log file is stored to file "C:/syslog.txt".

EXIT STATUS

       Not defined.

DEPENDENCIES

       Uses standard Perl modules.

       HTTP::Headers HTTP::Request::Common LWP::UserAgent LWP::Simple Sys::Syslog

STANDARDS

       The dyndns provider's client specification is at https://www.dyndns.com/developers/specs/

BUGS AND LIMITATIONS

   Cygwin syslog
       There is no syslog daemon in Cygwin. The Cygwin POSIX emulation layer takes care about syslog requests. On NT and above systems it logs to
       the Windows's event manager, on Win9x and ME a file is created in the root of drive "C:". See message
       <http://cygwin.com/ml/cygwin/2002-10/msg00219.html> for more details.

       You can see the entries in W2K Start => Settings => Administrative Tools => Computer Management: [ System Tools / Event Viewer /
       Application ]

   Debugging errors
       Please use option --debug 2 and save the result. Contact maintainer if you find bugs or need new features.

   About providers hnorg and noip
       The program is primarily developed and maintained to support dyndns.org.  The other providers haven't been tested since 2003.

SEE ALSO

       syslog(3), Debian package ddclient(1)

       See other client software at http://clients.dyndns.org

AVAILABILITY

       http://freecode.com/projects/perl-dyndns

AUTHOR

       This program is free software; you can redistribute and/or modify program under the terms of GNU General Public license either version 2 of
       the License, or (at your option) any later version.

       The documentation may be distributed subject to the terms and conditions set forth in GNU General Public License v2 or later (GNU GPL); or,
       at your option, distributed under the terms of GNU Free Documentation License version 1.2 or later (GNU FDL).

perl v5.14.2							    2012-01-12								 DYNDNS(1)