Hi,
I've recently setup KEA to handle DHCP, which is does already. It was a fun
experience to go through the documentation and testing it out.
I also have a knot dns server that manages my local zones. I've followed the
documentation for knot for creating my TSIG key, tested it using knsupdate (it
worked) and then added it to my kea-dhcp-ddns.conf according to the d2
documentation (also adding forward- and reverse-dns configuration). I've then
set dhcp_ddns=yes in keactrl.conf as well.
But I don't get any DDNS updates. I'm running Armbian (on a ASUS Tinkerboard
if it matters) but it's basically just Debian. I've unmasked, enabled and
started dhcp4/d2.
I've attached a log/config file so this mail won't get overly long here. I
think I've configured kea dhcp4/ddns correctly but I'm obviously missing
something that prevents this from working like expected. I've only included a
limited config but everything is the same for all subnets/zones.
Any pointers?
Regards,
Oscar
# systemctl status kea-ctrl-agent.service
● kea-ctrl-agent.service - Kea Control Agent
Loaded: loaded (/lib/systemd/system/kea-ctrl-agent.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-12-30 21:11:09 UTC; 20min ago
Docs: man:kea-ctrl-agent(8)
Main PID: 3724 (kea-ctrl-agent)
Tasks: 1 (limit: 4740)
Memory: 644.0K
CGroup: /system.slice/kea-ctrl-agent.service
└─3724 /usr/sbin/kea-ctrl-agent -c /etc/kea/kea-ctrl-agent.conf
# systemctl status kea-dhcp4-server.service
● kea-dhcp4-server.service - Kea IPv4 DHCP daemon
Loaded: loaded (/lib/systemd/system/kea-dhcp4-server.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-12-30 21:11:09 UTC; 12min ago
Docs: man:kea-dhcp4(8)
Main PID: 3721 (kea-dhcp4)
Tasks: 1 (limit: 4740)
Memory: 1.7M
CGroup: /system.slice/kea-dhcp4-server.service
└─3721 /usr/sbin/kea-dhcp4 -c /etc/kea/kea-dhcp4.conf
# systemctl status kea-dhcp-ddns-server.service
● kea-dhcp-ddns-server.service - Kea DDNS Service
Loaded: loaded (/etc/systemd/system/kea-dhcp-ddns-server.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2020-12-30 21:11:09 UTC; 13min ago
Docs: man:kea-dhcp-ddns(8)
Main PID: 3718 (kea-dhcp-ddns)
Tasks: 1 (limit: 4740)
Memory: 736.0K
CGroup: /system.slice/kea-dhcp-ddns-server.service
└─3718 /usr/sbin/kea-dhcp-ddns -c /etc/kea/kea-dhcp-ddns.conf
# cat /etc/kea/kea-dhcp4.conf
// Just parts of it, the config passes it's config test
{
"Dhcp4": {
"interfaces-config": {
"interfaces": [
"eth0.10/172.19.10.2",
"eth0.3/192.168.0.2"
]
},
// One subnet
"subnet4": [
{
// eth0.3
"subnet": "192.168.0.0/24",
"pools": [ { "pool": "192.168.0.100 - 192.168.0.200" } ],
"option-data": [
{ "name": "routers",
"data": "192.168.0.1"
},
{ "name": "domain-name-servers",
"data": "192.168.0.2"
},
{ "name": "domain-name",
"data": "management.home.arpa"
},
{ "name": "domain-search",
"data": "management.home.arpa, services.home.arpa"
}
],
}
]
// kea-dhcp-ddns.conf
{
"DhcpDdns":
{
"ip-address": "127.0.0.1",
"port": 53001,
"control-socket": {
"socket-type": "unix",
"socket-name": "/tmp/kea-dhcp-ddns-ctrl.sock"
},
"tsig-keys": [{ "name": "ddns", "algorithm": "HMAC-SHA256",
"secret": "no-this-is-not-my-secret-key" }],
// Just one local zone here, more in actual config but only the name differs
"forward-ddns": {
"ddns-domains": [
{ "name": "management.home.arpa.",
"key-name": "ddns",
"dns-servers": [
{
"hostname": "",
"ip-address": "127.0.0.1",
"port": 1053
}
]
}
]
},
"reverse-ddns": {
"ddns-domains": [
{ "name": "0.168.192.in-addr.arpa.",
"key-name": "ddns",
"dns-servers": [
{
"hostname": "",
"ip-address": "127.0.0.1",
"port": 1053
}
]
}
]
},
}
}
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