DDNS forces update with the same IP

Installing and Using OpenWrt
1

Hello everyone,

I noticed weird behaviour. My IP changes at about 3am, therefore I set check interval to 5 minutes and forced for 4 weeks, just in case ISP decides not to do any IP change. But I noticed the Forced update still being sometimes executed, while IP stays the same.

Why is this happening?

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162515  info : Rerun IP check at 2022-10-28 16:25
162515       : Detect local IP on 'web'
162515       : #> /bin/uclient-fetch -q -O /var/run/ddns/myddns_ipv4.dat -Y off 'http://checkip.dyndns.com' 2>/var/run/ddns/myddns_ipv4.err
162515       : Local IP '111.111.111.111' detected on web at 'http://checkip.dyndns.com'
162515       : Waiting 300 seconds (Check Interval)
163016       : Detect registered/public IP
163016       : #> /usr/bin/nslookup hostname.fakeddns.com  >/var/run/ddns/myddns_ipv4.dat 2>/var/run/ddns/myddns_ipv4.err
163016       : Registered IP '111.111.111.111' detected
163016  info : Rerun IP check at 2022-10-28 16:30
163016       : Detect local IP on 'web'
163016       : #> /bin/uclient-fetch -q -O /var/run/ddns/myddns_ipv4.dat -Y off 'http://checkip.dyndns.com' 2>/var/run/ddns/myddns_ipv4.err
163017       : Local IP '111.111.111.111' detected on web at 'http://checkip.dyndns.com'
163017       : Forced Update - L: 111.111.111.111' == R: '111.111.111.111'
163017       : #> /bin/uclient-fetch -q -O /var/run/ddns/myddns_ipv4.dat -Y off 'https://fakeddns.com/update?token=***PW***&domain=hostname.fakeddns.com' 2>/var/run/ddns/myddns_ipv4.err
163019       : DDNS Provider answered:
OK
163019  info : Forced update successful - IP: '111.111.111.111' send
163019       : Waiting 300 seconds (Check Interval)
163519       : Detect registered/public IP
163519       : #> /usr/bin/nslookup hostname.fakeddns.com  >/var/run/ddns/myddns_ipv4.dat 2>/var/run/ddns/myddns_ipv4.err
163520       : Registered IP '111.111.111.111' detected
163520  info : Rerun IP check at 2022-10-28 16:35
163520       : Detect local IP on 'web'
163520       : #> /bin/uclient-fetch -q -O /var/run/ddns/myddns_ipv4.dat -Y off 'http://checkip.dyndns.com' 2>/var/run/ddns/myddns_ipv4.err
163521       : Local IP '111.111.111.111' detected on web at 'http://checkip.dyndns.com'
163521       : Waiting 300 seconds (Check Interval)
164021       : Detect registered/public IP
164021       : #> /usr/bin/nslookup hostname.fakeddns.com  >/var/run/ddns/myddns_ipv4.dat 2>/var/run/ddns/myddns_ipv4.err
164021       : Registered IP '111.111.111.111' detected
2

If I am not wrong, there is a 72 hour forced interval on this provider.

3

I changed the IP and hostname link for privacy reasons... sorry if it wasn't obvious.

even so. It is forcing in less than 24 hours.

4

Any idea what is the force interval?
Can you try to change the force unit into hours and try 72 force interval?

5

it's to force the update even if IP never changes.

I tried deleting force interval unit, which defaults to 72. Same thing happened:
image

6

No, I meant how often does it do a force renewal.

7

ah, it was quite random, I think. about every 3-6 hours.

so far the problem fixed itself after installing sysupdate 22.03.2, which forced me to reinstall all the packages. Last update was 4 minutes after the IP change.

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8

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