Disable DHCP daemon?

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1

Hi you hard-working QNAP folks. :nerd_face:

QTS 5.2.7.3256 on a TS-251+.

I’m presently messing-around with some PXE software on my NAS, but found the QTS DHCP server is interfering with the port I need (67).

How can I disable the DHCP server? There doesn’t seem to be a way to do this via the QTS interface (Network & Virtual Switch → Network → DHCP Server). I can kill the processes of-course, but there should be a neater way to handle this. I don’t run any containers on this NAS.

Also, the DHCP service isn’t shown as a system service in the UI (Control Panel → System → System Status → System Service). Can this be added please?

Thank you.

2

Was there not a default DNSMasq install on the QNAP OS?
https://forum.qnap.com/viewtopic.php?t=157975

I agree, if not vital for operation, there should be a way to disable that

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3

Somebody did (presumably) put a request in before (for the DNS side of DNSMasq)

4

I haven’t checked but do we know if QNAP did something to permit this? If so, it’s a start. :wink:

5

Maybe there is a new little qcli option for this … worth a peek (even though the ‘help’ flag does not disclose all commands… annoyingly)

6

Maybe try

qcli_network --disabledhcpserver

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7

Oh, nice find! I’ll give that a go. :nerd_face:

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8

Nope, it seems that option doesn’t disable dhcpd. It takes a single required argument (the interface name):

[/share/Public] # qcli_network -d --help
  -d  --disabledhcpserver,                   disable DHCP server.
        interfaceID=<interfaceID>                  interfaceID
        ex:qcli_network -d interfaceID=eth0

I tried it on the main NAS Ethernet ports, and it reported success. But, the dhcpd kept running and was still listening on 0.0.0.0:67

:disappointed:

Some info to add: dhcpd wasn’t running until I installed Container Station.

But, even with Container Station stopped (and disabled), dhcpd kept running.

So, I uninstalled Container Station, and that killed dhcpd.

Also, the DHCP Server section of Network & Virtual Switch always shows the DHCP server status as ‘Enabled’, even when it’s not. * shrug *

9

boo…was worth a shot

10

I think it’s something QNAP really should fix. :wink:

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11

Hi @OneCD @dolbyman ,

Thank you very much for your detailed discussion and testing.
We truly appreciate the time and effort you’ve taken to share your findings.
Our internal team is currently reviewing and testing this behavior.
We will provide an update here once further information or improvements become available.

Best regards,
QNAP Team

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