ISC DHCPv6-BIND9 DDNS update problem
Mirsad Goran Todorovac
mirsad.todorovac at alu.unizg.hr
Thu Jun 9 09:22:53 UTC 2022
P.S.
We are using ISC DHCP 4.4.3 and BIND 9.16.27 on a Debian 10 Buster
system with 4.19.235-1 kernel and libc6:amd64 2.28-10+deb10u1.
root at domac:~# ldd /usr/local/sbin/dhcpd
linux-vdso.so.1 (0x00007ffc7afdb000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f0671607000)
/lib64/ld-linux-x86-64.so.2 (0x00007f0671c05000)
root at domac:~#
We have updated the network configuration on the router to not relay to
DHCPv6 on our domac sever but to advertise DHCPv6 server presence on the
subnet.
Now the log looks like this:
Jun 9 11:04:41 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:41 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:41 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:41 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:41 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:41 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:41 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:41 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:42 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:42 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:42 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:42 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:42 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:42 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:42 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:42 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:44 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:44 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:44 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:44 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:44 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:44 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:44 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:44 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:48 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:48 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:48 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:48 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Jun 9 11:04:48 domac dhcpd: Solicit message from
fe80::cff:4b3a:be79:cec0 port 546, transaction ID 0xA2D9AB00
Jun 9 11:04:48 domac dhcpd: Picking pool address 2001:b68:2:2800::10:1228
Jun 9 11:04:48 domac dhcpd: Advertise NA: address
2001:b68:2:2800::10:1228 to client with duid
00:01:00:01:2a:30:9a:4a:7c:6d:62:89:b4:29 iaid = 0 valid for 3600 seconds
Jun 9 11:04:48 domac dhcpd: Sending Advertise to
fe80::cff:4b3a:be79:cec0 port 546
Apparently, the client fe80::cff:4b3a:be79:cec0 never receives DHCPv6
Advertisement with assigned address from domac server, so it repeats
soliciting for other DHCPv6 server 7 more times:
11:02:37.403227 IP6 (flowlabel 0x9ecff, hlim 1, next-header UDP (17)
payload length: 94) fe80::3d9c:9ecd:42c:b76e.546 > ff02::1:2.547: [udp
sum ok] dhcp6 solicit (xid=9e8166 (elapsed-time 0) (client-ID
hwaddr/time type 1 time 641857482 1ca0b87d1191) (IA_NA IAID:102539448
T1:0 T2:0) (Client-FQDN) (vendor-class) (option-request
vendor-specific-info DNS-server DNS-search-list Client-FQDN))
11:02:37.403352 IP6 (flowlabel 0x52e68, hlim 64, next-header UDP (17)
payload length: 159) fe80::f21f:afff:fef1:420a.547 >
fe80::3d9c:9ecd:42c:b76e.546: *[bad udp cksum 0x78d2 -> 0x8bad!]* dhcp6
advertise (xid=9e8166 (IA_NA IAID:102539448 T1:3600 T2:7200 (IA_ADDR
2001:b68:2:2800::10:10ef pltime:604800 vltime:3600)) (client-ID
hwaddr/time type 1 time 641857482 1ca0b87d1191) (server-ID hwaddr/time
type 1 time 707489786 f01faff1420a) (preference 255) (DNS-server
2001:b68:2:2800::3 2001:b68:c:2::70:0) (DNS-search-list local.alu.hr.
alu.hr.))
There is this problem with "bad udp checksum" in tcpdump-ed packets from
domac's fe80::f21f:afff:fef1:420a interface: I'm new to IPv6, but I
think the receiver party is mandated to discard UDP packets with bad
checksum.
So the DHCPv6 server on domac never sees a Request nor Confirm message
from the client https://datatracker.ietf.org/doc/html/rfc3315#section-5.3
REQUEST (3) A client sends a Request message to request
configuration parameters, including IP
addresses, from a specific server.
CONFIRM (4) A client sends a Confirm message to any
available server to determine whether the
addresses it was assigned are still appropriate
to the link to which the client is connected.
My knowledge of DHCPv6 is very beginning level, but I'm afraid if we do
not make DHCPv6 DDNS work no one will use IPv6 for the addresses like
2001:b68:2:2800::3 are very hard to configure manually, remember and type.
The idea was that the users would be able to log in via VPN and access
their work PC with a symbolic FQDN domain name.
I think I am defeated here: some Googled articles say it is normal for
checksum to be bad if it is generated by NIC, but on the other hand the
client doesn't appear to receive any Advertise messages or send back
Request or Confirm. This way the server never gets confirmation that the
address is acceptable by the client and it never proceeds to DDNS name
update to the zone at all.
The clients worked with the IPv6 SLAAC configuration on the router, but
we wanted dynamic DNS addresses on the subnet for the assigned IPv6
addresses to make it more usable.
Thank you very much for help.
Kind regards,
Mirsad Todorovac
On 8.6.2022. 6:14, Mirsad Goran Todorovac wrote:
> Dear Sirs,
>
> Having compiled ISC DHCPD 4.4.3 with includes/site.h: #define
> DEBUG_DNS_UPDATES
> I get the following output. It appears that the DDNS update code isn't
> even called for IPv6.
>
> Am I doing something terribly wrong?
>
> Thank you.
>
> Jun 8 06:09:02 domac dhcpd: ddns.c(150): Allocating
> ddns_cb=0x5604136c60a0
> Jun 8 06:09:02 domac dhcpd: DDNS: ddns_fwd_srv_connector: ddns_cb:
> 0x5604136c60a0 flags: 50b state: DDNS_STATE_CLEANUP cur_func: <null>
> eresult: 0
> Jun 8 06:09:02 domac dhcpd: DDNS: ddns_modify_fwd
> Jun 8 06:09:02 domac dhcpd: DDNS: build_fwd_add1:
> pname:[R7000P.local.alu.hr] uname:[R7000P.local.alu.hr]
> Jun 8 06:09:02 domac dhcpd: DDNS request: id ptr 0x7fdc349e8010
> DDNS_STATE_ADD_FW_NXDOMAIN 192.168.100.215 for R7000P.local.alu.hr
> zone: local.alu.hr.dhcid:
> [00:01:01:52:62:16:06:17:56:5b:21:58:8f:69:59:ee:4e:bb:79:9d:5e:76:9b:3a:f3:b7:2c:0f:cf:01:db:4c:eb:6b:87
>
> Jun 8 06:09:02 domac dhcpd: ddns.c(1722): Updating lease_ptr for
> ddns_cp=0x5604136c60a0 (addr=192.168.100.215)
> Jun 8 06:09:02 domac dhcpd: DHCPREQUEST for 192.168.100.215 from
> 9c:3d:cf:11:aa:a6 (R7000P) via eth1
> Jun 8 06:09:02 domac dhcpd: DHCPACK on 192.168.100.215 to
> 9c:3d:cf:11:aa:a6 (R7000P) via eth1
> Jun 8 06:09:02 domac dhcpd: DDNS reply: id ptr 0x7fdc349e8010,
> result: YXDOMAIN
> Jun 8 06:09:02 domac dhcpd: DDNS: ddns_fwd_srv_add1: ddns_cb:
> 0x5604136c60a0 flags: 50b state: DDNS_STATE_ADD_FW_NXDOMAIN cur_func:
> ddns_fwd_srv_add1 eresult: 196614
> Jun 8 06:09:02 domac dhcpd: DDNS: ddns_modify_fwd
> Jun 8 06:09:02 domac dhcpd: DDNS: build_fwd_add2:
> pname:[R7000P.local.alu.hr] uname:[R7000P.local.alu.hr]
> Jun 8 06:09:02 domac dhcpd: DDNS request: id ptr 0x7fdc349e8010
> DDNS_STATE_ADD_FW_YXDHCID 192.168.100.215 for R7000P.local.alu.hr
> zone: local.alu.hr.dhcid:
> [00:01:01:52:62:16:06:17:56:5b:21:58:8f:69:59:ee:4e:bb:79:9d:5e:76:9b:3a:f3:b7:2c:0f:cf:01:db:4c:eb:6b:87
>
> Jun 8 06:09:02 domac dhcpd: DDNS reply: id ptr 0x7fdc349e8010,
> result: success
> Jun 8 06:09:02 domac dhcpd: DDNS:ddns_fwd_srv_add2: ddns_cb:
> 0x5604136c60a0 flags: 50b state: DDNS_STATE_ADD_FW_YXDHCID cur_func:
> ddns_fwd_srv_add2 eresult: 0
> Jun 8 06:09:02 domac dhcpd: Added new forward map from
> R7000P.local.alu.hr to 192.168.100.215
> Jun 8 06:09:02 domac dhcpd: DDNS: ddns_modify_ptr
> Jun 8 06:09:02 domac dhcpd: DDNS request: id ptr 0x7fdc349e8010
> DDNS_STATE_ADD_PTR R7000P.local.alu.hr for
> 215.100.168.192.in-addr.arpa. zone: 168.192.in-addr.arpa.dhcid:
> [00:01:01:52:62:16:06:17:56:5b:21:58:8f:69:59:ee:4e:bb:79:9d:5e:76:9b:3a:f3:b7:2c:0f:cf:01:db:4c:eb:6b:87
>
> Jun 8 06:09:02 domac dhcpd: DDNS reply: id ptr 0x7fdc349e8010,
> result: success
> Jun 8 06:09:02 domac dhcpd: Added reverse map from
> 215.100.168.192.in-addr.arpa. to R7000P.local.alu.hr
> Jun 8 06:09:02 domac dhcpd: ddns.c(1325): Updating lease_ptr for
> ddns_cp=0x5604136c60a0 (addr=192.168.100.215)
> Jun 8 06:09:02 domac dhcpd: ddns.c(1325):
> find_lease_by_ip_addr(192.168.100.215) successful:lease=0x7fdc346b4e20
> Jun 8 06:09:02 domac dhcpd: ddns.c(1326): freeing ddns_cb=0x5604136c60a0
> Jun 8 06:09:46 domac dhcpd: Solicit message from
> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
> Jun 8 06:09:46 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:09:46 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:09:46 domac dhcpd: Sending Advertise to
> fe80::8aad:43ff:fefa:3f96 port 546
> Jun 8 06:09:46 domac dhcpd: Solicit message from
> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
> Jun 8 06:09:46 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:09:46 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:09:46 domac dhcpd: Sending Advertise to
> fe80::8aad:43ff:fefa:3f96 port 546
> Jun 8 06:09:46 domac dhcpd: Relay-forward message from
> fe80::babe:bfff:fe26:9542 port 547, link address 2001:b68:2:2800::1,
> peer address fe80::8aad:43ff:fefa:3f96
> Jun 8 06:09:46 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:09:46 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:09:46 domac dhcpd: Sending Relay-reply to
> fe80::babe:bfff:fe26:9542 port 547
> Jun 8 06:11:57 domac dhcpd: Solicit message from
> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
> Jun 8 06:11:57 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:11:57 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:11:57 domac dhcpd: Sending Advertise to
> fe80::8aad:43ff:fefa:3f96 port 546
> Jun 8 06:11:57 domac dhcpd: Solicit message from
> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
> Jun 8 06:11:57 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:11:57 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:11:57 domac dhcpd: Sending Advertise to
> fe80::8aad:43ff:fefa:3f96 port 546
> Jun 8 06:11:57 domac dhcpd: Relay-forward message from
> fe80::babe:bfff:fe26:9542 port 547, link address 2001:b68:2:2800::1,
> peer address fe80::8aad:43ff:fefa:3f96
> Jun 8 06:11:57 domac dhcpd: Picking pool address
> 2001:b68:2:2800::10:1208
> Jun 8 06:11:57 domac dhcpd: Advertise NA: address
> 2001:b68:2:2800::10:1208 to client with duid
> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid for
> 3600 seconds
> Jun 8 06:11:57 domac dhcpd: Sending Relay-reply to
> fe80::babe:bfff:fe26:9542 port 547
>
> On 07. 06. 2022. 19:13, Mirsad Goran Todorovac wrote:
>> Hello all,
>>
>> I have a problem that our DHCPv6 DDNS update which works reliably
>> with IPv4 doesn't work at all when we implemented
>> the dual-stack operation with IPv6. There is not even a warning,
>> notice or error in the log. No syntax errors in the config
>> /etc/dhcp/dhcpd6.conf file.
>>
>> We are running Debian 10 Buster server with BIND 9.16.27 and ISC
>> DHCPd 4.4.1
>>
>> root at domac:# dpkg -l ...
>> Desired=Unknown/Install/Remove/Purge/Hold
>> |
>> Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
>> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
>> ||/ Name Version Architecture Description
>> +++-==============-===========================-============-=================================
>>
>> ii bind9 1:9.16.27-1~deb11u1~bpo10+1 amd64 Internet Domain
>> Name Server
>> ii isc-dhcp-server 4.4.1-2+deb10u1 amd64 ISC DHCP server for
>> automatic IP address assignment
>>
>> Here is a typical example of DHCPv6 transactions found in the log:
>>
>> Jun 7 16:53:27 domac dhcpd[2971]: Solicit message from
>> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
>> Jun 7 16:53:27 domac dhcpd[2971]: Picking pool address
>> 2001:b68:2:2800::10:1208
>> Jun 7 16:53:27 domac dhcpd[2971]: Advertise NA: address
>> 2001:b68:2:2800::10:1208 to client with duid
>> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid
>> for 3600 seconds
>> Jun 7 16:53:27 domac dhcpd[2971]: Sending Advertise to
>> fe80::8aad:43ff:fefa:3f96 port 546
>> Jun 7 16:53:27 domac dhcpd[2971]: Solicit message from
>> fe80::8aad:43ff:fefa:3f96 port 546, transaction ID 0x55E06C00
>> Jun 7 16:53:27 domac dhcpd[2971]: Picking pool address
>> 2001:b68:2:2800::10:1208
>> Jun 7 16:53:27 domac dhcpd[2971]: Advertise NA: address
>> 2001:b68:2:2800::10:1208 to client with duid
>> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid
>> for 3600 seconds
>> Jun 7 16:53:27 domac dhcpd[2971]: Sending Advertise to
>> fe80::8aad:43ff:fefa:3f96 port 546
>> Jun 7 16:53:27 domac dhcpd[2971]: Relay-forward message from
>> fe80::babe:bfff:fe26:9542 port 547, link address 2001:b68:2:2800::1,
>> peer address fe80::8aad:43ff:fefa:3f96
>> Jun 7 16:53:27 domac dhcpd[2971]: Picking pool address
>> 2001:b68:2:2800::10:1208
>> Jun 7 16:53:27 domac dhcpd[2971]: Advertise NA: address
>> 2001:b68:2:2800::10:1208 to client with duid
>> 00:01:00:01:27:7d:dd:63:88:ad:43:fa:3f:96 iaid = -1774192061 valid
>> for 3600 seconds
>> Jun 7 16:53:27 domac dhcpd[2971]: Sending Relay-reply to
>> fe80::babe:bfff:fe26:9542 port 547
>>
>> fe80::babe:bfff:fe26:9542 is local-link address of our router.
>>
>> Our DNS/DHCP server is 161.53.235.3 or 2001:b68:2:2800::3, LLA for
>> eth1 is fe80::f21f:afff:fef1:420a/64
>>
>> Here is our /etc/dhcp/dhcpd6.conf:
>>
>> default-lease-time 3600;
>> preferred-lifetime 604800;
>> option dhcp-renewal-time 3600;
>> option dhcp-rebinding-time 7200;
>> allow leasequery;
>>
>> option dhcp6.name-servers 2001:b68:2:2800::3,2001:b68:c:2::70:0;
>> option dhcp6.domain-search "alu.hr";
>>
>> option dhcp6.info-refresh-time 21600;
>>
>> ddns-update-style standard;
>> ddns-dual-stack-mixed-mode true;
>> update-conflict-detection false;
>> update-optimization false;
>> deny client-updates;
>> ddns-updates on;
>> authoritative;
>> log-facility local7;
>> ddns-domainname "local.alu.hr.";
>> ddns-rev-domainname "ip6.arpa.";
>>
>> include "/etc/bind/ddns.key";
>>
>> shared-network ilica85.alu.hr {
>> subnet6 2001:b68:2:2800::/64 {
>> range6 2001:b68:2:2800::10:1000 2001:b68:2:2800::10:13ff;
>> option dhcp6.domain-search "local.alu.hr","alu.hr";
>> option dhcp6.name-servers 2001:b68:2:2800::3,2001:b68:c:2::70:0;
>> ddns-domainname "local.alu.hr";
>>
>> zone local.alu.hr. {
>> # primary6 2001:b68:2:2800::3;
>> primary 127.0.0.1;
>> key DDNS_UPDATE;
>> }
>> zone 0.0.8.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa. {
>> # primary6 2001:b68:2:2800::3;
>> primary 127.0.0.1;
>> key DDNS_UPDATE;
>> }
>> }
>> }
>>
>> subnet6 2001:b68:2:2a00::/64 {
>> range6 2001:b68:2:2a00::1000 2001:b68:2:2a00::10ff;
>> option dhcp6.domain-search "slava.alu.hr","alu.hr";
>> option dhcp6.name-servers 2001:b68:2:2800::3,2001:b68:c:2::70:0;
>> ddns-domainname "slava.alu.hr";
>>
>> zone slava.alu.hr. {
>> primary6 2001:b68:2:2800::3;
>> key DDNS_UPDATE;
>> }
>>
>> zone 0.0.a.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa. {
>> primary6 2001:b68:2:2800::3;
>> key DDNS_UPDATE;
>> }
>> }
>>
>> The corresponding entries in /etc/bind/named.conf.local are:
>>
>> zone "0.0.8.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa" in {
>> type master;
>> file
>> "/var/cache/bind/0.0.8.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa.db";
>> allow-update { key DDNS_UPDATE; };
>> allow-transfer { 31.147.205.54; 161.53.2.70; };
>> also-notify { 31.147.205.54; 161.53.2.70; };
>> forwarders {};
>> };
>>
>> zone "0.0.a.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa" in {
>> type master;
>> file
>> "/var/cache/bind/0.0.a.2.2.0.0.0.8.6.b.0.1.0.0.2.ip6.arpa.db";
>> allow-update { key DDNS_UPDATE; };
>> allow-transfer { 31.147.205.54; 161.53.2.70; };
>> also-notify { 31.147.205.54; 161.53.2.70; };
>> forwarders {};
>> };
>>
>> zone "local.alu.hr" in {
>> type master;
>> file "/var/cache/bind/local.alu.hr.db";
>> allow-update { key DDNS_UPDATE; };
>> allow-transfer { 31.147.205.54; 161.53.2.70; };
>> also-notify { 31.147.205.54; 161.53.2.70; };
>> forwarders {};
>> };
>>
>> zone "slava.alu.hr" in {
>> type master;
>> file "/var/cache/bind/slava.alu.hr.db";
>> allow-update { key DDNS_UPDATE; };
>> allow-transfer { 31.147.205.54; 161.53.2.70; };
>> also-notify { 31.147.205.54; 161.53.2.70; };
>> dnssec-policy "standard";
>> key-directory "/var/cache/bind/keys";
>> forwarders {};
>> };
>>
>> We are also using views in BIND9, but they work well updating the
>> "internal" and "universe" zones with DHCPv4, i.e.:
>>
>> Jun 7 16:48:21 domac dhcpd[986]: DHCPREQUEST for 192.168.100.215
>> from 9c:3d:cf:11:aa:a6 (R7000P) via eth1
>> Jun 7 16:48:21 domac dhcpd[986]: DHCPACK on 192.168.100.215 to
>> 9c:3d:cf:11:aa:a6 (R7000P) via eth1
>> Jun 7 16:48:21 domac dhcpd[986]: Added new forward map from
>> R7000P.local.alu.hr to 192.168.100.215
>> Jun 7 16:48:21 domac dhcpd[986]: Added reverse map from
>> 215.100.168.192.in-addr.arpa. to R7000P.local.alu.hr
>>
>> As you can see in the options, I tried various combinations, and I
>> seem to be out of options. But we are new to IPv6
>> and DHCPv6, so there may be something obvious to you I cannot see
>> (like DDNS not being enabled in ISC dhcpd binary
>> with option -6)?
>>
>> I am very interested personally in IPv6 adoption for we are expecting
>> a surge in multimedia content provided,
>> possibly broadcasted, additional options with IoT, security,
>> surveillance cameras (requiring public IP we are short of).
>>
>> All of this would be greatly simplified and more adopted if the
>> users, professors, staff and students wouldn't
>> have to remember IPv6 address like 2001:b68:2:2800::3 but used an
>> automatically assigned domain name instead.
>>
>> Manual IPv6 configuration and static tables for this would be an
>> overkill, we are understaffed to maintain it.
>>
>> Thank you very much for your time and help.
>>
>> Kind regards,
>> Mirsad Todorovac
>>
> --
> Mirsad Goran Todorovac
> CARNet sistem inženjer
> Grafički fakultet | Akademija likovnih umjetnosti
> Sveučilište u Zagrebu
--
Mirsad Todorovac
CARNet system engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb
Republic of Croatia, the European Union
--
CARNet sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
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