freedns.afraid.org help

[jkay18041]

I have a Cisco 1841 router with 12.4 on it. I am trying to set it up to work with freedns.afraid.org dynamic dns. I saw a video on how to do it on a 2600 series router but it has a different command set than my 1800 series. Can anyone shed some light on how to properly set this up?

Thank you

[ghostinthenet]

Josh at blindhog.net has a video showing how to do this exact thing. You can find it here.

He uses an IP SLA process with an HTTP GET mechanism to do the updates, but this should be easily adaptable to an IP DDNS configuration too.

[jkay18041]

I found that article as well. The problem is when I am in config mode and type in ip sla 1 and press enter my only options are exit and icmp-echo. I can't find the http get mechanism to complete this. Any ideas? I am on 124-15.t13b.bin

[ghostinthenet]

Might be able to do it with IP DDNS. What if you try something like this?

ip ddns update method DDNS_FreeDNS
 HTTP
  add http://freedns.afraid.org?SHA_Key
 interval maximum 90 0 0 0
!
interface WAN
 ip ddns update DDNS_FreeDNS

This will update using the provided URL whenever the interface comes up, changes addresses or keeps the same address beyond the specified interval.

Normally, the address and hostname are passed in the URL, but if FreeDNS has the hostname predefined and is assuming the address based on the source of the update request, it should work.

[juliocarossella]

Just in case:

Full URI from Cisco router is different because it replaces the domain with the actual IP. And FreeDns doesn´t like, it says: HTTP/1.1 404 Not Found  (text/html)

The only way I found: 

ip sla 1

 http get http://freedns.afraid.org/dynamic/update.php?dk1UGUVURXXXXXXXXXXXXVVaNTc6MTYwOTY3MTE=

frequency 7200

ip sla schedule 1 life forever start-time now

Thank you.