DHCPv6 dynamic dns RFC2136 broken?

[junicast]

Hi,

I'm on 2.5.2 and I just setup a downstream network to use DHCPv6 for the clients plus dynamic DNS update.
As a result every DHCPv6 address was written into my subdomain demo.junicast.de.
A day after I set this up this just stopped working. I tried kind of everything from deleting the dyndns config from my DHCPv6 config and doing it from scratch.

The problem remains. Since then I also spent some time trying to find out what goes wrong here. Actually all the clients in this network (currently 60, all OpenWrt) receive a valid DHCPv6 address and along with it a prefix via Prefix Delegation.

The pfSense just stopped sending out DNS Update queries to the DNS server I can see zero traffic to the destination DNS server ip. I tried manually to connect to the DNS server from command line, which works flawlessly.

Out of desperation I updated to 2.6 testing environment, same situation. I can change back any time though. Anybody got an idea? Can I set the DHCP server to debug output somehow?

Please see those screenshots.

[viktor_g]

Please show the /var/dhcpd/etc/dhcpdv6.conf and /var/dhcpd/var/db/dhcpd6.leases for checking

[junicast]

@viktor_g
This is the config:

option domain-name "demo.junicast.de";
option ldap-server code 95 = text;
option domain-search-list code 119 = text;

default-lease-time 7200;
max-lease-time 86400;
log-facility local7;
one-lease-per-client true;
deny duplicates;
ping-check true;
update-conflict-detection false;
authoritative;
subnet6 2001:470:1f15:bfe::/64 {
	range6 2001:470:1f15:bfe::2000 2001:470:1f15:bfe::3000;
	ddns-domainname "demo.junicast.de";
	allow client-updates;
	#option dhcp6.name-servers --;
	prefix6 2001:470:7e68:4000:: 2001:470:7e68:7f00:: /62;

}
key "junicastgateway" {
	algorithm hmac-sha512;
	secret jfToHAGW16**obfuscated**253ybflSmcasdfasdfasdfasdfsadfazV+A==;
}
zone demo.junicast.de. {
	primary6 2a00:1234:1234:2::121;
	key "junicastgateway";
}
subnet6 2001:470:7e68::/64 {
	range6 2001:470:7e68::1000 2001:470:7e68::4000;
	do-forward-updates false;
	#option dhcp6.name-servers --;
	prefix6 2001:470:7e68:2000:: 2001:470:7e68:2f00:: /56;

}
ddns-update-style interim;
update-static-leases on;

and this is the admittedly quite long leases file:

[2.6.0-DEVELOPMENT][root@gateway.demo.junicast.de]/root: cat /var/dhcpd/var/db/dhcpd6.leases
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.4.2-P1

# authoring-byte-order entry is generated, DO NOT DELETE
authoring-byte-order little-endian;

server-duid "\000\001\000\001(\337\205\230\372\015\273\234\245q";

ia-na "\001\000\000\000\000\003\000\001\316\206\366\015s\265" {
  cltt 5 2021/09/24 06:25:37;
}

ia-na "\001\000\000\000\000\003\000\001\306\325u^)9" {
  cltt 5 2021/09/24 06:20:58;
}

ia-na "\001\000\000\000\000\003\000\001\352\222\2311bU" {
  cltt 5 2021/09/24 06:32:03;
}

ia-na "\001\000\000\000\000\003\000\001\366D\236\362\201p" {
  cltt 5 2021/09/24 06:24:01;
}

ia-na "\001\000\000\000\000\003\000\001\366\243R,\271G" {
  cltt 5 2021/09/24 06:31:38;
}

ia-na "\001\000\000\000\000\003\000\001\256\343\250\355K\356" {
  cltt 5 2021/09/24 06:32:13;
}

ia-na "\001\000\000\000\000\003\000\001\312\330\217e\263\335" {
  cltt 5 2021/09/24 06:33:22;
}

ia-na "\001\000\000\000\000\003\000\001\362w\355~\010\303" {
  cltt 5 2021/09/24 06:33:05;
}

ia-na "\001\000\000\000\000\003\000\001\036\001\244\215H?" {
  cltt 5 2021/09/24 06:31:33;
}

ia-na "\001\000\000\000\000\003\000\001\032\035\267?f\030" {
  cltt 5 2021/09/24 06:46:39;
}

ia-na "\001\000\000\000\000\003\000\001\0020\323c\374\347" {
  cltt 5 2021/09/24 06:33:18;
}

ia-na "\001\000\000\000\000\003\000\001\032I\255\034\036z" {
  cltt 5 2021/09/24 06:31:31;
}

ia-na "\001\000\000\000\000\003\000\001\376\315\355\007|\177" {
  cltt 5 2021/09/24 06:40:40;
}

ia-na "\001\000\000\000\000\003\000\0012\020s_\321\267" {
  cltt 5 2021/09/24 06:18:21;
}

ia-na "\001\000\000\000\000\003\000\001\366\255\356\250\337M" {
  cltt 5 2021/09/24 06:32:54;
}

ia-na "\001\000\000\000\000\003\000\001\016^\305hO\007" {
  cltt 5 2021/09/24 06:32:53;
}

ia-na "\001\000\000\000\000\003\000\001B ^\2458N" {
  cltt 5 2021/09/24 06:32:31;
}

ia-na "\001\000\000\000\000\003\000\001\022\257J`\005h" {
  cltt 5 2021/09/24 06:32:05;
}

ia-na "\001\000\000\000\000\003\000\001\016_\331\216\031\234" {
  cltt 5 2021/09/24 06:32:17;
}

ia-na "\001\000\000\000\000\003\000\001^\011U\021\372T" {
  cltt 5 2021/09/24 06:31:12;
}

ia-na "\001\000\000\000\000\003\000\001b\013M\025\242\260" {
  cltt 5 2021/09/24 06:50:37;
}

ia-na "\001\000\000\000\000\003\000\001RP1\027\222\025" {
  cltt 5 2021/09/24 06:31:59;
}

ia-na "\001\000\000\000\000\003\000\001\022\251,\3655\016" {
  cltt 5 2021/09/24 06:39:39;
}

ia-na "\001\000\000\000\000\003\000\001N-]\332\0217" {
  cltt 5 2021/09/24 06:32:09;
}

ia-na "\001\000\000\000\000\003\000\001z\017:\023Y\316" {
  cltt 5 2021/09/24 06:21:07;
}

ia-na "\001\000\000\000\000\003\000\001RMDU\256!" {
  cltt 5 2021/09/24 06:32:26;
}

ia-na "\001\000\000\000\000\003\000\001\"\365'\012\016L" {
  cltt 5 2021/09/24 06:24:29;
}

ia-na "\001\000\000\000\000\003\000\001.\302\013\231b\002" {
  cltt 5 2021/09/24 06:18:09;
}

ia-na "\001\000\000\000\000\003\000\001V\025\213\272\377A" {
  cltt 5 2021/09/24 06:32:51;
}

ia-na "\001\000\000\000\000\003\000\001r\022S\202\253L" {
  cltt 5 2021/09/24 06:30:54;
}

ia-na "\001\000\000\000\000\003\000\001\036\275\034\347\232\347" {
  cltt 5 2021/09/24 06:23:39;
}

ia-na "\001\000\000\000\000\003\000\001&\3111vi\275" {
  cltt 5 2021/09/24 06:31:27;
}

ia-na "\001\000\000\000\000\003\000\001\036\357\015\301\037%" {
  cltt 5 2021/09/24 06:29:14;
}

ia-na "\001\000\000\000\000\003\000\0016n\236\327E," {
  cltt 5 2021/09/24 06:40:53;
}

ia-na "\001\000\000\000\000\003\000\001\226\005\012\315\230N" {
  cltt 5 2021/09/24 06:31:30;
}

ia-na "\001\000\000\000\000\003\000\001\2069O%\326\001" {
  cltt 5 2021/09/24 06:32:52;
}

ia-na "\001\000\000\000\000\003\000\001\202]\016l\241_" {
  cltt 5 2021/09/24 06:32:53;
}

ia-na "\001\000\000\000\000\003\000\001r\202\001\274'o" {
  cltt 5 2021/09/24 06:22:57;
}

ia-na "\001\000\000\000\000\003\000\001J\214\301(\360^" {
  cltt 5 2021/09/24 06:31:08;
}

ia-na "\001\000\000\000\000\003\000\001\256\013_3A\346" {
  cltt 5 2021/09/24 06:32:01;
}

ia-na "\001\000\000\000\000\003\000\001\312\004=\031o\011" {
  cltt 5 2021/09/24 06:32:33;
}

ia-na "\001\000\000\000\000\003\000\001V_\325\372\243\245" {
  cltt 5 2021/09/24 06:30:01;
}

ia-na "\001\000\000\000\000\003\000\001zt\215\324\012\032" {
  cltt 5 2021/09/24 06:31:23;
}

ia-na "\001\000\000\000\000\003\000\001v\2616[\350," {
  cltt 5 2021/09/24 06:33:15;
}

ia-na "\001\000\000\000\000\003\000\001\226Mq\302\215\000" {
  cltt 5 2021/09/24 06:29:11;
}

ia-na "\001\000\000\000\000\003\000\001F\331\3146\257\267" {
  cltt 5 2021/09/24 06:24:07;
}

ia-na "\001\000\000\000\000\003\000\001\206ca\312\342\274" {
  cltt 5 2021/09/24 06:31:13;
}

ia-na "\001\000\000\000\000\003\000\001J\322o\333\342\261" {
  cltt 5 2021/09/24 06:32:33;
}

ia-na "\001\000\000\000\000\003\000\001\352\022\0021G5" {
  cltt 5 2021/09/24 06:31:48;
}

ia-na "\001\000\000\000\000\003\000\001\212[\322h?t" {
  cltt 5 2021/09/24 06:31:56;
}

ia-na "\001\000\000\000\000\003\000\001\246v\207I\013)" {
  cltt 5 2021/09/24 06:31:16;
}

ia-na "\001\000\000\000\000\003\000\001\216\343\010,Yk" {
  cltt 5 2021/09/24 06:24:03;
}

ia-na "\001\000\000\000\000\003\000\001\262]~\212-\210" {
  cltt 5 2021/09/24 06:24:35;
}

ia-na "\001\000\000\000\000\003\000\001n\273\272\370\227\204" {
  cltt 5 2021/09/24 06:32:52;
}

ia-na "\001\000\000\000\000\003\000\001\242A\347\320\260\344" {
  cltt 5 2021/09/24 06:31:43;
}

ia-na "\001\000\000\000\000\003\000\001\304n\037\352\300\326" {
  cltt 5 2021/09/24 14:03:42;
  iaaddr 2001:470:1f15:bfe::25c4 {
    binding state active;
    preferred-life 4500;
    max-life 7200;
    ends 5 2021/09/24 16:03:42;
  }
}

ia-na "\001\000\000\000\000\003\000\001\262\243\215\014\344\362" {
  cltt 5 2021/09/24 06:32:20;
}

ia-na "\001\000\000\000\000\003\000\001\262\261O\236\362l" {
  cltt 5 2021/09/24 06:30:52;
}

ia-na "\001\000\000\000\000\003\000\001\242\254\230\310\356\270" {
  cltt 5 2021/09/24 06:32:14;
}

ia-na "\001\000\000\000\000\003\000\001\256\310\226\203\035?" {
  cltt 5 2021/09/24 06:31:49;
}

ia-na "\001\000\000\000\000\003\000\001\356\223$l/-" {
  cltt 5 2021/09/24 06:34:02;
}

ia-pd "\001\000\000\000\000\003\000\001\316\206\366\015s\265" {
  cltt 5 2021/09/24 06:25:37;
}

ia-pd "\001\000\000\000\000\003\000\001\306\325u^)9" {
  cltt 5 2021/09/24 06:20:58;
}

ia-pd "\001\000\000\000\000\003\000\001\352\222\2311bU" {
  cltt 5 2021/09/24 06:32:03;
}

ia-pd "\001\000\000\000\000\003\000\001\366D\236\362\201p" {
  cltt 5 2021/09/24 06:24:01;
}

ia-pd "\001\000\000\000\000\003\000\001\366\243R,\271G" {
  cltt 5 2021/09/24 06:31:38;
}

ia-pd "\001\000\000\000\000\003\000\001\256\343\250\355K\356" {
  cltt 5 2021/09/24 06:32:13;
}

ia-pd "\001\000\000\000\000\003\000\001\312\330\217e\263\335" {
  cltt 5 2021/09/24 06:33:22;
}

ia-pd "\001\000\000\000\000\003\000\001\362w\355~\010\303" {
  cltt 5 2021/09/24 06:33:05;
}

ia-pd "\001\000\000\000\000\003\000\001\036\001\244\215H?" {
  cltt 5 2021/09/24 06:31:33;
}

ia-pd "\001\000\000\000\000\003\000\001\032\035\267?f\030" {
  cltt 5 2021/09/24 06:46:39;
}

ia-pd "\001\000\000\000\000\003\000\001\0020\323c\374\347" {
  cltt 5 2021/09/24 06:33:18;
}

ia-pd "\001\000\000\000\000\003\000\001\032I\255\034\036z" {
  cltt 5 2021/09/24 06:31:31;
}

ia-pd "\001\000\000\000\000\003\000\001\376\315\355\007|\177" {
  cltt 5 2021/09/24 06:40:40;
}

ia-pd "\001\000\000\000\000\003\000\0012\020s_\321\267" {
  cltt 5 2021/09/24 06:18:21;
}

ia-pd "\001\000\000\000\000\003\000\001\366\255\356\250\337M" {
  cltt 5 2021/09/24 06:32:54;
}

ia-pd "\001\000\000\000\000\003\000\001\016^\305hO\007" {
  cltt 5 2021/09/24 06:32:53;
}

ia-pd "\001\000\000\000\000\003\000\001B ^\2458N" {
  cltt 5 2021/09/24 06:32:31;
}

ia-pd "\001\000\000\000\000\003\000\001\022\257J`\005h" {
  cltt 5 2021/09/24 06:32:05;
}

ia-pd "\001\000\000\000\000\003\000\001\016_\331\216\031\234" {
  cltt 5 2021/09/24 06:32:17;
}

ia-pd "\001\000\000\000\000\003\000\001^\011U\021\372T" {
  cltt 5 2021/09/24 06:31:12;
}

ia-pd "\001\000\000\000\000\003\000\001b\013M\025\242\260" {
  cltt 5 2021/09/24 06:50:37;
}

ia-pd "\001\000\000\000\000\003\000\001RP1\027\222\025" {
  cltt 5 2021/09/24 06:31:59;
}

ia-pd "\001\000\000\000\000\003\000\001\022\251,\3655\016" {
  cltt 5 2021/09/24 06:39:39;
}

ia-pd "\001\000\000\000\000\003\000\001N-]\332\0217" {
  cltt 5 2021/09/24 06:32:09;
}

ia-pd "\001\000\000\000\000\003\000\001z\017:\023Y\316" {
  cltt 5 2021/09/24 06:21:07;
}

ia-pd "\001\000\000\000\000\003\000\001RMDU\256!" {
  cltt 5 2021/09/24 06:32:26;
}

ia-pd "\001\000\000\000\000\003\000\001\"\365'\012\016L" {
  cltt 5 2021/09/24 06:24:29;
}

ia-pd "\001\000\000\000\000\003\000\001.\302\013\231b\002" {
  cltt 5 2021/09/24 06:18:09;
}

ia-pd "\001\000\000\000\000\003\000\001V\025\213\272\377A" {
  cltt 5 2021/09/24 06:32:51;
}

ia-pd "\001\000\000\000\000\003\000\001r\022S\202\253L" {
  cltt 5 2021/09/24 06:30:54;
}

ia-pd "\001\000\000\000\000\003\000\001\036\275\034\347\232\347" {
  cltt 5 2021/09/24 06:23:39;
}

ia-pd "\001\000\000\000\000\003\000\001&\3111vi\275" {
  cltt 5 2021/09/24 06:31:27;
}

ia-pd "\001\000\000\000\000\003\000\001\036\357\015\301\037%" {
  cltt 5 2021/09/24 06:29:14;
}

ia-pd "\001\000\000\000\000\003\000\0016n\236\327E," {
  cltt 5 2021/09/24 06:40:53;
}

ia-pd "\001\000\000\000\000\003\000\001\226\005\012\315\230N" {
  cltt 5 2021/09/24 06:31:30;
}

ia-pd "\001\000\000\000\000\003\000\001\2069O%\326\001" {
  cltt 5 2021/09/24 06:32:52;
}

ia-pd "\001\000\000\000\000\003\000\001\202]\016l\241_" {
  cltt 5 2021/09/24 06:32:53;
}

ia-pd "\001\000\000\000\000\003\000\001r\202\001\274'o" {
  cltt 5 2021/09/24 06:22:57;
}

ia-pd "\001\000\000\000\000\003\000\001J\214\301(\360^" {
  cltt 5 2021/09/24 06:31:08;
}

ia-pd "\001\000\000\000\000\003\000\001\256\013_3A\346" {
  cltt 5 2021/09/24 06:32:01;
}

ia-pd "\001\000\000\000\000\003\000\001\312\004=\031o\011" {
  cltt 5 2021/09/24 06:32:33;
}

ia-pd "\001\000\000\000\000\003\000\001V_\325\372\243\245" {
  cltt 5 2021/09/24 06:30:01;
}

ia-pd "\001\000\000\000\000\003\000\001zt\215\324\012\032" {
  cltt 5 2021/09/24 06:31:23;
}

ia-pd "\001\000\000\000\000\003\000\001v\2616[\350," {
  cltt 5 2021/09/24 06:33:15;
}

ia-pd "\001\000\000\000\000\003\000\001\226Mq\302\215\000" {
  cltt 5 2021/09/24 06:29:11;
}

ia-pd "\001\000\000\000\000\003\000\001F\331\3146\257\267" {
  cltt 5 2021/09/24 06:24:07;
}

ia-pd "\001\000\000\000\000\003\000\001\206ca\312\342\274" {
  cltt 5 2021/09/24 06:31:13;
}

ia-pd "\001\000\000\000\000\003\000\001J\322o\333\342\261" {
  cltt 5 2021/09/24 06:32:33;
}

ia-pd "\001\000\000\000\000\003\000\001\352\022\0021G5" {
  cltt 5 2021/09/24 06:31:48;
}

ia-pd "\001\000\000\000\000\003\000\001\212[\322h?t" {
  cltt 5 2021/09/24 06:31:56;
}

ia-pd "\001\000\000\000\000\003\000\001\246v\207I\013)" {
  cltt 5 2021/09/24 06:31:16;
}

ia-pd "\001\000\000\000\000\003\000\001\216\343\010,Yk" {
  cltt 5 2021/09/24 06:24:03;
}

ia-pd "\001\000\000\000\000\003\000\001\262]~\212-\210" {
  cltt 5 2021/09/24 06:24:35;
}

ia-pd "\001\000\000\000\000\003\000\001n\273\272\370\227\204" {
  cltt 5 2021/09/24 06:32:52;
}

ia-pd "\001\000\000\000\000\003\000\001\242A\347\320\260\344" {
  cltt 5 2021/09/24 06:31:43;
}

ia-pd "\001\000\000\000\000\003\000\001\304n\037\352\300\326" {
  cltt 5 2021/09/24 14:03:42;
  iaprefix 2001:470:7e68:7efc::/62 {
    binding state active;
    preferred-life 4500;
    max-life 7200;
    ends 5 2021/09/24 16:03:42;
  }
}

ia-pd "\001\000\000\000\000\003\000\001\262\243\215\014\344\362" {
  cltt 5 2021/09/24 06:32:20;
}

ia-pd "\001\000\000\000\000\003\000\001\262\261O\236\362l" {
  cltt 5 2021/09/24 06:30:52;
}

ia-pd "\001\000\000\000\000\003\000\001\242\254\230\310\356\270" {
  cltt 5 2021/09/24 06:32:14;
}

ia-pd "\001\000\000\000\000\003\000\001\256\310\226\203\035?" {
  cltt 5 2021/09/24 06:31:49;
}

ia-pd "\001\000\000\000\000\003\000\001\356\223$l/-" {
  cltt 5 2021/09/24 06:34:02;
}

ia-na "\001\000\000\000\000\003\000\001\304n\037\352\300\326" {
  cltt 5 2021/09/24 14:41:13;
  iaaddr 2001:470:1f15:bfe::25c4 {
    binding state active;
    preferred-life 4500;
    max-life 7200;
    ends 5 2021/09/24 16:41:13;
  }
}

ia-pd "\001\000\000\000\000\003\000\001\304n\037\352\300\326" {
  cltt 5 2021/09/24 14:41:13;
  iaprefix 2001:470:7e68:7efc::/62 {
    binding state active;
    preferred-life 4500;
    max-life 7200;
    ends 5 2021/09/24 16:41:13;
  }
}

[junicast]

I reinstalled 2.5.2 and imported my old 2.5 config but the problem persists.
I'm running out of ideas.

[viktor_g]

Could you provide client log also?

It's better to create a bugreport:
https://docs.netgate.com/pfsense/en/latest/development/bug-reports.html