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Today's Topics:
1. Reverse DNS update (tach yon)
----------------------------------------------------------------------
Message: 1
Date: Thu, 26 May 2016 11:22:15 +0100
From: tach yon <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [kea-dev] Reverse DNS update
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
I've set up Kea 1.0.0 to serve DHCP requests and store lease information in a
PgSQL database. There's also a separate bind 9.10 server that I'm trying to
push dynamic DNS updates to, but unfortunately this isn't working. I'm trying
to find out why, but I've come across something I don't quite understand.
This suggests to me that the entry has been successfully added to the database
with the fqdn_rev boolean marked as true:
address | hwaddr | client_id | valid_lifetime |
expire | subnet_id | fqdn_fwd | fqdn_rev | hostname |
state-----------+----------------+------------------+----------------+------------------------+-----------+----------+----------+---------------------------+-------
168566422 | \x0050569d0f1f | \x010050569d0f1f | 4000 | 2016-05-26
11:04:35+01 | 1 | f | t | windhcp.example.net. | 0
Showing fqdn_rev marked as true seems strange because in kea.conf I have it set
to update forward DNS, not reverse DNS.
"DhcpDdns": { "tsig-keys": [ {
"name": "dynkey", "algorithm": "HMAC-MD5",
"secret": "xxx" }, ], "forward-ddns": {
"ddns-domains": [ {
"name": "dynamic.example.net.", "key-name": "dynkey",
"dns-servers": [ { "ip-address": "10.12.30.7" } ]
}, ] }, "reverse-ddns": {
"ddns-domains": [ ] }},
I also see this in the ddns log:
2016-05-26 09:57:55.347 DEBUG [kea-dhcp-ddns.dhcp-to-d2/94515]
DHCP_DDNS_REV_REQUEST_IGNORED Request ID: Reverse updates are disabled, the
reverse portion of request will be ignored: Type: 0 (CHG_ADD)Forward Change:
noReverse Change: noFQDN: [windhcp.dynamic.example.net.]IP Address:
[10.12.30.150]Lease Expires On: 20160526100435Lease Length: 4000
2016-05-26 09:57:55.348 DEBUG [kea-dhcp-ddns.dhcp-to-d2/94515]
DHCP_DDNS_REQUEST_DROPPED Request ID : Request contains no enabled update
requests and will be dropped: Type: 0 (CHG_ADD)Forward Change: noReverse
Change: noFQDN: [windhcp.dynamic.example.net.]IP Address: [10.12.30.150]Lease
Expires On: 20160526100435Lease Length: 4000
This feels like it's trying to update a reverse request despite having
configured it to create forward entries, unless I configured it wrong :\
If someone could please help make sense of this it would be very much
appreciated. Thank you in advance for your time and consideration.
Kind regards,Lewis
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