Saturday, January 21, 2012

DDNS configuration on Cisco

1. create DDNS A record from a DDNS provider, e.g. no-ip.org or dnsdynamic.org
2. configure it onto a cisco router:
ip name-server 8.8.8.8
ip name-server 8.8.4.4
ip ddns update method no-ip
 HTTP
  add http://username:password@dynupdate.no-ip.com/nic/update?hostname=ywt.no-ip.org
 interval maximum 0 0 1 0

interface Dialer0
 ip ddns update hostname ywt.no-ip.org
 ip ddns update no-ip

Use "debug ip ddns update" to check the result.

Ref: http://www.cisco.com/en/US/docs/ios/12_3/12_3y/12_3ya8/gt_ddns.html
http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/811-cisco-router-ddns.html
http://www.no-ip.com/support/guides/routers/using_cisco_routers_with_no-ip.html

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