Expected Behaviour:
When I disable the DHCP server function on my router, I should still be able to access the pi-hole admin console at its previous IP address from my chrome browser on Windows 10.
Actual Behaviour:
When I disable the DHCP server function on my D-Link DIR885L router, I can no longer access the pi-hole server at its previous IP address (192.168.0.119) in order to turn on the DHCP server function in it. In fact, I can't access anything, even the router at 192.168.0.1. I had to reset the router to regain control. What am I missing here?
I was trying to follow the instructions here: How do I use Pi-hole's built in DHCP server (and why would I want to)?
Thanks for your help.
Make sure Pi-hole is assigned a static IP address making it independent from the router DHCP:
pi@noads:~ $ journalctl -u dhcpcd
[..]
Sep 08 22:28:43 noads.dehakkelaar.nl systemd[1]: Starting dhcpcd on all interfaces...
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: dev: loaded udev
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: DUID xx:xx:xx
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: eth0: IAID xx:xx:xx:xx
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: eth0: using static address 10.0.0.2/24
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: eth0: adding route to 10.0.0.0/24
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: eth0: adding default route via 10.0.0.1
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30082]: forked to background, child pid 30098
Sep 08 22:28:43 noads.dehakkelaar.nl systemd[1]: Started dhcpcd on all interfaces.
Sep 08 22:28:43 noads.dehakkelaar.nl dhcpcd[30098]: eth0: soliciting an IPv6 router
Sep 08 22:28:55 noads.dehakkelaar.nl dhcpcd[30098]: eth0: no IPv6 Routers available
Whats IP ?
ip -4 a
And whats in below file:
tail -20 /etc/dhcpcd.conf
EDIT: And post a debug token here if you want to have the devs/mods to take a closer look ?
Log in to your Pi-hole's Web interface
Navigate to Tools > Generate debug log
Click the Generate debug log button
Send us the debug token
[debug]
jfb
September 8, 2019, 8:39pm
3
Please send us the token generated by
pihole -d
or do it through the Web interface:
Log in to your Pi-hole's Web interface
Navigate to Tools > Generate debug log
Click the Generate debug log button
Send us the debug token
[debug]
1 Like
I think it already has a static IP address. Doesn't the fact that I couldn't even access the router at 192.168.0.1 indicate a more fundamental problem?
Here is the output from your suggestions: (Will include debug token in next post.)
Apr 18 01:25:04 raspberrypi systemd[1]: Started dhcpcd on all interfaces.#static ip_address=192.168.0.10/24#static ip6_address=fd51:42f8:caae:d92e::ff/64#static routers=192.168.0.1#static domain_name_servers=192.168.0.1 8.8.8.8 fd51:42f8:caae:d92e::1
#profile static_eth0#static ip_address=192.168.1.23/24#static routers=192.168.1.1#static domain_name_servers=192.168.1.1
#interface eth0#fallback static_eth0
interface wlan0
The debug token is:
https://tricorder.pi-hole.net/nuslfp3u8m
To be clear, it is currently running in DNS mode, not DHCP mode. DNS mode doesn't work on my D-Link DIR-885L router because it insists on having both primary and secondary DNS addresses. I can't have both addresses point to the same place (e.g. 192.168.0.119). It doesn't accept 0.0.0.0. I've tried using other valid addresses in the network (e.g. 192.168.0.1) but that doesn't work. If I leave the secondary blank, it magically gets filled in by the router.
Above one indicates dhcpcd5 was actually able to assign a static IP.
Yes.nslookup ?
The order of switching on/off DHCP service on the router/Pi-hole isn't important.
This could also be a router specific problem like the router blocking DHCP or other safety features.
Use one PC with a static assigned IP address to troubleshoot and use other devices to test DHCP renewal and DNS resolution.
Oh cr.p, do you need IPv6 ?
Don’t need IPv6. I accidently installed with only IPv6 (because the install instruction was “space bar to select” rather than “space bar to DEselect.” And then I went back through the install process and deselected IPv6 but maybe it was still in there. The web-based admin console shows blank for IPv6 address.
Pi-hole Ethernet Interface:
wlan0
Pi-hole IPv4 address:
192.168.0.119/24
Pi-hole IPv6 address:
Pi-hole hostname:
pi-hole
Anyway, is there something I should do to turn this off?
Regards,
Hal Jennings
in Austin, TX - Live Music Capital of the World
www.jenningsweb.us
Turn off dns for IPv6, you can use the IPv4 to resolve IPv6 too.
OK. I got the DHCP server working. I think the key things were to make the PC I'm working from have a static IP address and turning on pi-hole's DHCP server before disabling the router's DHCP server. I also disabled the IPv6 router function. I think pi-hole already has IPv6 disabled, though in the admin console, it shows some IPv6 query types (AAAA) in the dashboard pie chart.
Thanks for your help.
1 Like
Nice job ... from one former IBM'er to another
IBM TSS Benelux.
How did you know that I’m a retired IBMer?!? You’re a pretty good sleuth in addition to being a good techie.
Regards,
Hal Jennings
in Austin, TX - Live Music Capital of the World
www.jenningsweb.us
Well, every time you post a reply using your mail client, it adds a footer:
I’ve had that footer for decades. You might be the second person who clicked on it. You, sir, are amazing.
Keep up the good work!
Regards,
Hal Jennings
in Austin, TX - Live Music Capital of the World
www.jenningsweb.us
1 Like
system
October 1, 2019, 12:33am
15
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