DDNS(Inadyn)

bluepoint

Very Senior Member
Since my ISP enabled IPV6 a week ago, DDNS updates every hour. Does it means my IPv6 address changes every hour cause my ipv4 IP doesn't? Is this how ddns should work?
Code:
Sep 19 18:09:27 rc_service: dhcp6c 19430:notify_rc restart_ddns
Sep 19 18:09:27 custom_script: Running /jffs/scripts/service-event (args: restart ddns)
Sep 19 18:09:27 ddns: update WWW.ASUS.COM [email protected], wan_unit 0
Sep 19 18:09:27 ddns: Clear ddns cache.
Sep 19 18:09:27 ddns: Start Inadyn(10).
Sep 19 18:09:27 inadyn[19440]: In-a-dyn version 2.9.1 -- Dynamic DNS update client.
Sep 19 18:09:27 inadyn[19440]: Update forced for alias xxxxxxxxx.asuscomm.com, new IP# 68.132.x.xxx
Sep 19 18:09:28 inadyn[19440]: alias address=<68.132.x.xxx>
Sep 19 18:09:28 inadyn[19440]: request<GET /ddns/update.jsp?hostname=xxxxxxxxx.asuscomm.com&myip=68.132.x.xxx&model=RT-AX88U&fw_ver=3.0.0.4.386.8_0 HTTP/1.0^M Authorization: Basic MDRENEM0NEZGRUUwOjU3REYxNTVCRDcxRkFENkI0RDE2QURCNEVDMDAwQjZC^M Host: ns1.asuscomm.com^M User-Agent: inadyn/2.9.1 https://github.com/troglobit/inadyn/issues^M ^M >
Sep 19 18:09:28 inadyn[19440]: [response_update]HTTP/1.1 200 OK^M Date: Mon, 19 Sep 2022 22:09:28 GMT^M Server: Apache^M Content-Length: 0^M Connection: close^M Content-Type: text/html; charset=UTF-8^M ^M
Sep 19 18:09:28 inadyn[19440]: Updating cache for xxxxxxxxx.asuscomm.com
 
Last edited:

archiel

Senior Member
AFAIK the DDNS service will check 30 minutes before and on the lease renewal, so as I have 1 hour leases from my ISP the system checks every 30 minutes. Again, AFAIK this happens for both IPv4 and IPv6, the difference being that if the system is IPv4 only, the check only reports to SYSLOG when there is a change whereas once you add IPv6 it always reports, change or no change.
 

bluepoint

Very Senior Member
AFAIK the DDNS service will check 30 minutes before and on the lease renewal, so as I have 1 hour leases from my ISP the system checks every 30 minutes. Again, AFAIK this happens for both IPv4 and IPv6, the difference being that if the system is IPv4 only, the check only reports to SYSLOG when there is a change whereas once you add IPv6 it always reports, change or no change.
Not a problem at all I'm just curious why DDNS suddenly checks every hour when IPv6 was added in the mix. When I had IPv4 only I have never seen DDNS update not unless it's the 21st day or when the router was rebooted. If this is how it will be with dual stack, then I'm happy it's working as it should be.
 

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