Dynv6 DDNS script "successfully" sending IP, but not shown on Dynv6 server

KingCZE · May 1, 2023, 11:41am

Hi, does anyone have a similar issue or a solution to mine?

I have set up a Dynamic DNS for Dynv6 service on my 192.168.1.2 OpenWrt dumb AP / switch (so I had to use URL for obtaining the IP, as the dumb AP does not have a wan interface and a public IP). I manage to set it up the way that the system log does not show any error message and the DDNS service looks like it "successfully" sends and verifies the IP and info to Dynv6. However, Dynv6 does not get the updates.

I don't know if the problem is on the OpenWrt side or the Dynv6 side. However, taken that the forum on Dynv6 is pretty much dead and I have never had a problem with their service (from a main router), I assume the OpenWrt forum is more suitable for this question.

The /etc/config/ddns file:

config ddns 'global'
	option ddns_dateformat '%F %R'
	option ddns_loglines '250'
	option ddns_rundir '/var/run/ddns'
	option ddns_logdir '/var/log/ddns'

config service 'dynv6'
	option service_name 'dynv6.com'
	option use_ipv6 '0'
	option enabled '1'
	option lookup_host 'DOMAIN.dynv6.net'
	option domain 'DOMAIN.dynv6.net'
	option username 'none'
	option password 'PASS/API'
	option ip_source 'web'
	option ip_url 'http://checkip.amazonaws.com'
	option interface 'wan'
	option use_syslog '2'
	option check_unit 'minutes'
	option force_unit 'minutes'
	option retry_unit 'seconds'

Again, it seems to get a verification (so the API and login info seems to be correct... when not set up properly, there is an error in system log), but it does not really gets it through to the dynv6 server.

AndrewZ · May 1, 2023, 12:11pm

I don't think you really have wan on dumb AP.
Anyway, check what is in your DynDNS client log.

lleachii · May 1, 2023, 12:25pm

I don't see an actual URL that communicates the update to your DDNS service - just an IP check.

KingCZE · May 1, 2023, 12:38pm

You are probably correct, I missed this – I changed it to br-lan, but still the same – it seems to verify everything right, but no update on the dynv6 server.

The dynv6 log is following:

 233921       : ************ ************** ************** **************
 233921  note : PID '3505' started at 2023-05-01 23:39
 233921       : ddns version  : 2.8.2-37
 233921       : uci configuration:
ddns.dynv6.check_unit='minutes'
ddns.dynv6.domain='DOMAIN.dynv6.net'
ddns.dynv6.enabled='1'
ddns.dynv6.force_unit='minutes'
ddns.dynv6.interface='br-lan'
ddns.dynv6.ip_source='web'
ddns.dynv6.ip_url='http://checkip.amazonaws.com'
ddns.dynv6.lookup_host='DOMAIN.dynv6.net'
ddns.dynv6.password='***PW***'
ddns.dynv6.retry_unit='seconds'
ddns.dynv6.service_name='dynv6.com'
ddns.dynv6.use_ipv6='0'
ddns.dynv6.use_syslog='2'
ddns.dynv6.username='none'
ddns.dynv6=service
 233921       : verbose mode  : 0 - run normal, NO console output
 233921       : check interval: 600 seconds
 233921       : force interval: 4320 seconds
 233921       : retry interval: 60 seconds
 233921       : retry max count : 0 times
 233921       : No old process
 233921       : last update: never
 233921       : Detect registered/public IP
 233921       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv6.dat 2>/var/run/ddns/dynv6.err
 233922       : Registered IP 'IP-ADDRESS' detected
 233922  info : Starting main loop at 2023-05-01 23:39
 233922       : Detect current IP on 'web'
 233922       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://checkip.amazonaws.com'
 233922       : Current IP 'IP-ADDRESS' detected on web at 'http://checkip.amazonaws.com'
 233922       : Forced Update - L: 'IP-ADDRESS' == R: 'IP-ADDRESS'
 233922       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://dynv6.com/api/update?hostname=DOMAIN.dynv6.net&token=***PW***&ipv4=IP-ADDRESS'
 233924       : DDNS Provider answered:
addresses unchanged
 233924  info : Forced update successful - IP: 'IP-ADDRESS' send
 233924       : Waiting 600 seconds (Check Interval)
 234924       : Detect registered/public IP
 234924       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv6.dat 2>/var/run/ddns/dynv6.err
 234924       : Registered IP 'IP-ADDRESS' detected
 234924  info : Rerun IP check at 2023-05-01 23:49
 234924       : Detect current IP on 'web'
 234924       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://checkip.amazonaws.com'
 234924       : Current IP 'IP-ADDRESS' detected on web at 'http://checkip.amazonaws.com'
 234924       : Waiting 600 seconds (Check Interval)
 235924       : Detect registered/public IP
 235924       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv6.dat 2>/var/run/ddns/dynv6.err
 235925       : Registered IP 'IP-ADDRESS' detected
 235925  info : Rerun IP check at 2023-05-01 23:59
 235925       : Detect current IP on 'web'
 235925       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://checkip.amazonaws.com'
 235925       : Current IP 'IP-ADDRESS' detected on web at 'http://checkip.amazonaws.com'
 235925       : Waiting 600 seconds (Check Interval)
 000925       : Detect registered/public IP
 000925       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv6.dat 2>/var/run/ddns/dynv6.err
 000926       : Registered IP 'IP-ADDRESS' detected
 000926  info : Rerun IP check at 2023-05-02 00:09
 000926       : Detect current IP on 'web'
 000926       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://checkip.amazonaws.com'
 000926       : Current IP 'IP-ADDRESS' detected on web at 'http://checkip.amazonaws.com'
 000926       : Waiting 600 seconds (Check Interval)
 001926       : Detect registered/public IP
 001926       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv6.dat 2>/var/run/ddns/dynv6.err
 001926       : Registered IP 'IP-ADDRESS' detected
 001926  info : Rerun IP check at 2023-05-02 00:19
 001926       : Detect current IP on 'web'
 001926       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv6.dat -o /var/run/ddns/dynv6.err --no-proxy 'http://checkip.amazonaws.com'
 001927       : Current IP 'IP-ADDRESS' detected on web at 'http://checkip.amazonaws.com'
 001927       : Waiting 600 seconds (Check Interval)

Interesting. It seems that it does communicate with dynv6. Does it mean that if it detects the same IP on the web interface (e.g. the Amazon URL IP check) and the DDNS server, then it does not update it and does not send the instruction to the dynv6 server? From what I remember, it always used to send the instruction, even if the IP still matched the one on the DDNS server.

KingCZE · May 1, 2023, 12:41pm

This is not an issue (and it would end up as an error message in the system log). The DDNS has scripts for specific DDNS services. option service_name 'dynv6.com' is one of them and it contains the http link for the DDNS message. There is no difference between this script and if I specify it straight in the DDNS config file without specifying the service_name.

AndrewZ · May 1, 2023, 12:42pm

Put a dummy address in dynv6 control panel manually then re-test the update.
BTW, I suppose the interface name is optional.

KingCZE · May 1, 2023, 1:00pm

The DDNS config file now:


config ddns 'global'
	option ddns_dateformat '%F %R'
	option ddns_loglines '250'
	option ddns_rundir '/var/run/ddns'
	option ddns_logdir '/var/log/ddns'

config service 'dynv6'
	option service_name 'dynv6.com'
	option use_ipv6 '0'
	option enabled '1'
	option lookup_host 'DOMAIN.dynv6.net'
	option domain 'DOMAIN.dynv6.net'
	option username 'none'
	option password 'PASS-API'
	option ip_source 'web'
	option ip_url 'http://checkip.amazonaws.com'
	option interface 'br-lan'
	option use_syslog '2'
	option check_unit 'minutes'
	option force_unit 'minutes'
	option retry_unit 'seconds'

config service 'dynv62'
#	option service_name 'dynv6.com'
	option use_ipv6 '0'
	option enabled '1'
	option lookup_host 'DOMAIN.dynv6.net'
	option domain 'DOMAIN.dynv6.net'
	option username 'none'
	option password 'PASS-API'
	option ip_source 'web'
	option ip_url 'http://checkip.amazonaws.com'
#	option interface 'br-lan'
	option use_syslog '2'
	option check_unit 'minutes'
	option force_unit 'minutes'
	option retry_unit 'seconds'
	option update_url 'http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv4=[IP]'

The log file from the DDNS settings with the direct link:

 004931       : ************ ************** ************** **************
 004931  note : PID '9178' started at 2023-05-02 00:49
 004931       : ddns version  : 2.8.2-37
 004931       : uci configuration:
ddns.dynv62.check_unit='minutes'
ddns.dynv62.domain='DOMAIN.dynv6.net'
ddns.dynv62.enabled='1'
ddns.dynv62.force_unit='minutes'
ddns.dynv62.ip_source='web'
ddns.dynv62.ip_url='http://checkip.amazonaws.com'
ddns.dynv62.lookup_host='DOMAIN.dynv6.net'
ddns.dynv62.password='***PW***'
ddns.dynv62.retry_unit='seconds'
ddns.dynv62.update_url='http://dynv6.com/api/update?hostname=[DOMAIN]&token=[PASSWORD]&ipv4=[IP]'
ddns.dynv62.use_ipv6='0'
ddns.dynv62.use_syslog='2'
ddns.dynv62.username='none'
ddns.dynv62=service
 004931       : verbose mode  : 0 - run normal, NO console output
 004931       : check interval: 600 seconds
 004931       : force interval: 4320 seconds
 004931       : retry interval: 60 seconds
 004931       : retry max count : 0 times
 004931       : No old process
 004931       : last update: never
 004931       : Detect registered/public IP
 004931       : #> /usr/bin/host -t A DOMAIN.dynv6.net  >/var/run/ddns/dynv62.dat 2>/var/run/ddns/dynv62.err
 004931       : Registered IP 'IP' detected
 004931  info : Starting main loop at 2023-05-02 00:49
 004931       : Detect current IP on 'web'
 004931       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv62.dat -o /var/run/ddns/dynv62.err --no-proxy 'http://checkip.amazonaws.com'
 004932       : Current IP 'IP' detected on web at 'http://checkip.amazonaws.com'
 004932       : Forced Update - L: 'IP' == R: 'IP'
 004932       : #> /usr/bin/wget --hsts-file=/tmp/.wget-hsts -nv -t 1 -O /var/run/ddns/dynv62.dat -o /var/run/ddns/dynv62.err --no-proxy 'http://dynv6.com/api/update?hostname=DOMAIN.dynv6.net&token=***PW***&ipv4=IP'
 004932       : DDNS Provider answered:
addresses unchanged
 004932  info : Forced update successful - IP: 'IP' send
 004933       : Waiting 600 seconds (Check Interval)

It indeed seems to work on the OpenWrt side and the verification – both of them, through the service_name and the direct link. Yet I still don't see an update on dynv6.

Any thoughts? I will try to contact the support on dynv6 if there is any apart from the dead forum.

AndrewZ · May 1, 2023, 1:08pm

Put a dummy address in dynv6 control panel manually, make sure you see it with nslookup on the AP then re-test the update.

KingCZE · May 1, 2023, 1:35pm

I just put the address to my web browser and got a reply "address unchanged". I guess the indicator "last update" on dynv6 changes only when the address changes. I guess it is alright now.

system · May 11, 2023, 1:35pm

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