Linux15 dynamic dns-2


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Dynamic DNS-2

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Linux15 dynamic dns-2

  1. 1. Dynamic DNS
  2. 2. DDNS (Dynamic Domain Name System) • DDNS (Dynamic DNS) is a service that maps Internet domain names to IP addresses. • Unlike DNS that only works with static IP addresses, DDNS is designed to also support dynamic IP addresses, such as those assigned by a DHCP server. [2]
  3. 3. • That makes DDNS a good fit for home networks, which often receive dynamic public IP addresses from their Internet provider that occasionally change. • Dynamic DNS (DDNS) is the ability for a host to update its own DNS A record. [3] DDNS (Dynamic Domain Name System)
  4. 4. • A host's IP address (or what appears to be its IP address) can change when you use a home broadband service such as cable or DSL. • If you have a broadband connection, DDNS allows you to have a full-time Internet server even though you don't have a static IP address. [4] DDNS (Dynamic Domain Name System)
  5. 5. •To use DDNS, one simply signs up with a DDNS provider and installs network software on their host to monitor its IP address. –For example, provides a free dynamic DDNS service via software that can run on Windows, Mac or Linux computers. [5] DDNS (Dynamic Domain Name System)
  6. 6. • In cases if a website is hosted on a server with dynamic IP, each time you connect to the internet, a temporary IP address is assigned to the server by the Internet Service Provider. So when the IP address of the server changes you will not be able to access the website using Domain name. [6] DDNS (Dynamic Domain Name System)
  7. 7. • In such cases the Dynamic DNS will take care of this issue by changing the IP address of your website correspondingly. [7] DDNS (Dynamic Domain Name System)
  8. 8. [8] DDNS (Dynamic Domain Name System)
  9. 9. • All DDNS service providers require that you use a DDNS client on your web server that will periodically update the IP address information in your provider's DDNS record. • One of the most commonly used clients is DDclient. [9] Install a DDNS Client On Your Server
  10. 10. • Like most RedHat and Fedora Linux software products, DDclient is available in the RPM format. • You can usually download the software from your DDNS provider, or you can find it at [10] Install a DDNS Client On Your Server
  11. 11. • The RPM name usually starts with ddclient followed by a version number, as in ddclient-3.6.3- 1.noarch.rpm • Its configuration file is /etc/ddclient.conf file [11] Install a DDNS Client On Your Server
  12. 12. • Username: Your DDNS account's login name • Password: Your DDNS account's password • Use: The method used to determine the IP address to advertise to the DDNS server [12] The most important general parameters to configure are:
  13. 13. • Server: The name of the DDNS provider's main DNS server • Protocol: The methodology the DDNS client should use to communicate with the DDNS server • Your domain: The domain to which your web server will belong [13] Some important DDNS provider parameters are
  14. 14. 1) You can configure DDclient to start at boot time using the chkconfig command: [root@bigboy tmp]# chkconfig ddclient on [14] How to Get DDclient Started
  15. 15. 2) You can start, stop, and restart DDclient after boot time using the DDclient initialization script as in: [root@bigboy tmp]# service ddclient start [root@bigboy tmp]# service ddclient stop [root@bigboy tmp]# service ddclient restart [15] How to Get DDclient Started
  16. 16. 3) Testing Your Dynamic DNS [root@bigboy tmp]# host Server: Address: ** server can't find NXDOMAIN [16] How to Get DDclient Started
  17. 17. 3) Testing Your Dynamic DNS [root@bigboy tmp]# host Server: Address: ** server can't find NXDOMAIN [root@bigboy tmp]# host has address [17] How to Get DDclient Started
  18. 18. Dynamic DNS Thank You….!!! [18]