is there anyone who has luck with no-ip on cisco ? i have followed both below articles but no luck.. debug wont reveal any thing. http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/811-cisco-router-ddns.html http://www.openna.com/doc...

a little typo in R1 configs. interface FastEthernet0/1 ip address 20.1.1.1 255.255.255.0 it should be /30 subnet mask. great article.