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################################################################################
# This is a crontab example for DEINE.DNS.org - (uid: ICH)
# Generated 2014-04-14 11:08:21 PST @ https://freedns.afraid.org/
################################################################################
# NOTES:
# * Works on Mac/Linux/*BSD/*NIX type systems
# * Updates automatically each 5 minutes
#
# INSTRUCTIONS:
# 1) To install, goto a system console, then type: 'crontab -e' (without 
#      apostrophe's) then paste the bottom last line/entry from this file (all
#      on 1 line) and then save
# 2) To list installed crontabs (verifying installation), type: 'crontab -l'
# 3) To verify updates are occuring, wait 5 minutes, then 'cat /tmp/freedns_DEINE_DNS_HIER.log'
# 4) To read more about how crontab works, check out 'man -a crontab' or search 
#      the web for 'installing a crontab' or 'cron' (same thing)
# 
# SOME THOUGHTS:
# - This example is for simplicity, and ultra compatibility
# - I urge you to make updates only when a IP change occurs if you know how 
#      (such as on ifup), or by polling your router status/snmp device first.
#      I wrote a client/daemon 'lastip2.phps' listed on the clients page that 
#      can pull a router status page - however it requires some skill and
#      knowledge of your particular network to set it up properly
# - This below generated example avoids updates when seconds is between :55
#      and :05 to prevent a thundering herd of updates at the minute
# - PATH line may optional, or not! Depends on your system, you may need it 
#      somewhere (at the top) of your cron entry if you don't have one already 
#      defined, include in your path where 'wget' and 'sleep' commands live on 
#      your system
# - You can also run this @reboot, which is great for cloud image / instances, 
#      (no 'sleep' needed if @reboot)
# - 'fetch', 'wget' or 'curl' all basically do the same thing, and should 
#      interchangeably work - you may prefer or use one of those.  There is also
#      'lynx -dump', or 'w3m -dump' - I am sure there are many more!
# 
# Have a better method, or directions? Send it to me!

################################################################################
# Things to check if if doesn't work...:
################################################################################
# Do you need to install wget?  As root, try:
# pkg_add -r wget; apt-get install wget; yum install wget
# 
# Run a manual freedns dynamic update right from your console to check for 
# errors, here's some examples (you can use/modify any update line that works
# within your cron):
# 
# Example #1:
# wget --no-check-certificate -O - https://freedns.afraid.org/dynamic/update.php?Vldjhadskasjhdakjbdeskjbskdjsckkjskdjchskcjhcksjhcsk
# 
# Example #2:
# curl https://freedns.afraid.org/dynamic/update.php?Vldjhadskasjhdakjbdeskjbskdjsckkjskdjchskcjhcksjhcsk
# 
# Example #3:
# fetch -o - https://freedns.afraid.org/dynamic/update.php?Vldjhadskasjhdakjbdeskjbskdjsckkjskdjchskcjhcksjhcsk

# You might need to include this path line in crontab, (or specify full paths)
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

1,6,11,16,21,26,31,36,41,46,51,56 * * * * sleep 19 ; wget --no-check-certificate -O - https://freedns.afraid.org/dynamic/update.php?Vldjhadskasjhdakjbdeskjbskdjsckkjskdjchskcjhcksjhcsk >> /tmp/freedns_DEINE_DNS_HIER.log 2>&1 &

1:

https://freedns.afraid.org/dynamic/update.php?<ganz_vieles_wirres_zeugs>==