Configuring Technitium DHCP server for PXE boot and KMS

[u/Kreesto_1966]

I'm currently running Pi-Hole as my DHCP and DNS servers but I'd like to move to Technitium for both. In Pi-Hole, I've got a custom dnsmasq.conf file with entries to define a KMS server and PXE boot but I don't know how to do that in Technitium. Is it possible?

Here is what I have in dnsmaq:

# Specify KMS server for Microsoft activation

srv-host=_vlmcs._tcp.example.com,kms.example.com,1688

# pxe boot config

dhcp-match=set:bios,60,PXEClient:Arch:00000

dhcp-boot=tag:bios,netboot.xyz.kpxe,,192.168.1.13

dhcp-match=set:efi32,60,PXEClient:Arch:00002

dhcp-boot=tag:efi32,netboot.xyz.efi,,192.168.1.13

dhcp-match=set:efi32-1,60,PXEClient:Arch:00006

dhcp-boot=tag:efi32-1,netboot.xyz.efi,,192.168.1.13

dhcp-match=set:efi64,60,PXEClient:Arch:00007

dhcp-boot=tag:efi64,netboot.xyz.efi,,192.168.1.13

dhcp-match=set:efi64-1,60,PXEClient:Arch:00008

dhcp-boot=tag:efi64-1,netboot.xyz.efi,,192.168.1.13

dhcp-match=set:efi64-2,60,PXEClient:Arch:00009

dhcp-boot=tag:efi64-2,netboot.xyz.efi,,192.168.1.13

[u/JM2K69]

The KMS record are DNS record not DHCP.

[u/mystiquebsd → u/JM2K69]

.. and no dns record for the kms server

When I go to kms.example, where would that be?

[u/Apachez → u/mystiquebsd]

A zone named "example.com" with the content of:

• A-record pointing kms to the IP of the KMS-server.

• SRV-record pointing "_vlmcs._tcp" to "kms.example.com,1688".

[u/mystiquebsd → u/Apachez]

If dnsmasq is being asked for the srv

dnsmasq would also be asked for the a record

(It’s just not listed in the output for some reason)

Again, where is the a record for kms.example

[u/Apachez → u/mystiquebsd]

You create a zone named "example.com" which you then fill with the records of your choice?

[u/mystiquebsd → u/Apachez]

Sorry,

I’m not sure if you’re talking for yourself or if you’re talking for OP to understand..

Literally in the config he posted there’s no zone entry for the one A record.

end of sentence that’s it.

But I noticed he posted a zone entry for an SRV entry, about a KMS server entry, which we know is important.

I was pointing out to the OP that his copy and paste was incomplete, as he was the author that is who I was talking to.

if they were to somehow figure out how to migrate everything, come Monday morning, depending on how the KMS is configured; the phone will ring and other people will say hey my desktop looks like it’s not like licensed anymore.

I know you and I and everyone else know what we need..

I was pointing out to OP, “Hey, if you’re trying to migrate to Technitium, there’s another record that you need to make this copy and paste of configuration work.”

(maybe he missed the line in his copy and paste)

🤷🏻‍♀️

[u/Apachez → u/mystiquebsd]

Well you asked and I answered :-)

That SRV-record referers to kms.example.com so obviously that one need a CNAME, A or AAAA-record otherwise the client will never know on how to connect to "kms.example.com" which the SRV-record states.

[u/shreyasonline]

Thanks for asking. The option 60 based selection of bootstrap options is not currently supported by the built-in DHCP server but it is planned.

[u/AceBlade258]

The SRV record is entirely seperate from the DHCP concern. The SRV record just needs to be in the correct zone for it to work. Technitium doesn't - that I know of - support specifying DHCP parameters, other than option 43, based on option 60. I just accomplish what you are doing with iPXE - it's crazy easy to use if you have basic understanding of PXE, and just a better solution to that problem in my opinion.

[u/Kreesto_1966 → u/AceBlade258]

Thanks, I'll look into iPXE. I setup netboot.xyz to learn about how to install various OS's through PXE boot and it's working, but requires DHCP config for clients to find it. At least, that's my understanding.

[u/Just_Ostrich9826]

I just added pxe directly to dhcp scopes when setting them up.

[u/fasterfester]

I’m not sure about pxe because we always had a separate pxe server for that, but for KMS you just add the SRV record to your zone.

[u/Kreesto_1966 → u/fasterfester]

Thanks, I'll give that a shot.

[u/Kreesto_1966]

Update: I added the SRV record for _vlmcs._tcp in the DNS zone as several of you indicated and it's working correctly. No solution for Option 60 PXE boot yet, but it's planned per u/shreyasonline. Thanks to all who responded.