Pi-Hole Question with Deco X55
Currently have my X55 as my main router/DHCP server. I have a separte machine setup with PiHole and I have my DNS set to the IP of this machine. I have noticed I do not get MAC addresses or hostnames of devices within my DNS server but these values show in the Deco Devices. Do I need to set something so this info is pushed during DNS lookup?
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So I was talking with my boss and he also noticed the mismatch of Subnet Mask between ISP (255.255.240.0) and LAN (255.255.252.0). He mentioned due to this computers on the LAN are unable to see Broadcast packets so he advised me to change my LAN Subnest Mask to the same from ISP. I have not tried this yet but plan to maybe this weekend. I have also found if I Reserver all the IPs I want to track to then within Pihole make them Clients and entries into Local DNS at least Hostnames show now.
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Hi, Thanks for the feedback.
You could check on the device IP settings to make sure they are using the Pi-Hole as the DNS server, for example:
If the devices already received the correct DNS settings, there might be some incorrect mapping rules on the PiHole. You can join the discussion here to find more details:
https://www.reddit.com/r/pihole/
Best regards.
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I am pretty sure everything is setup correctly as when I had the same setup with my ISP (Google Fiber) everything worked as intended and my Pihole is seeing traffic just not MAC Addresses/hostnames. But I will check all this again. Thank you for responding, I was holding off on Reddit just due to the community and possible extreme downvoting.
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Here is my output as well
```
PS C:\Users\shado> ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Gaming-Rig
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Ethernet:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . : lan
Description . . . . . . . . . . . : Intel(R) Ethernet Connection (2) I219-V
Physical Address. . . . . . . . . : E0-D5-5E-2A-DE-28
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Ethernet 2:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Killer E2500 Gigabit Ethernet Controller
Physical Address. . . . . . . . . : XX-XX-XX-XX-XX-XX
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : LOL-NOPE
IPv4 Address. . . . . . . . . . . : 192.168.68.85(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Lease Obtained. . . . . . . . . . : Wednesday, March 19, 2025 9:22:47 AM
Lease Expires . . . . . . . . . . : Wednesday, March 19, 2025 11:22:47 AM
Default Gateway . . . . . . . . . : 192.168.68.1
DHCP Server . . . . . . . . . . . : 192.168.68.1
DHCPv6 IAID . . . . . . . . . . . : UMMMMM
DHCPv6 Client DUID. . . . . . . . : HIDING
DNS Servers . . . . . . . . . . . : 192.168.68.50
8.8.8.8
NetBIOS over Tcpip. . . . . . . . : Enabled
```
The IP address of my Pihole is correct here as its 192.168.68.50 with backup DNS of Google at 8.8.8.8. I am also allowing my Router be the DHCP Server while separate DNS server with PiHole. Currently have to do this as the PiHole box is in need of full rebuild as its reboot cycle has some error that causes it to loop and could take up to 45 minutes to boot.
Now I did notice via the Deco App within "Internet Connection" the submask under IPV4 connection is set to 255.255.240.0 where in this output is is 255.255.252.0. Could that be something?
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Hi, Thanks for the update.
Now I did notice via the Deco App within "Internet Connection" the submask under IPV4 connection is set to 255.255.240.0 where in this output is is 255.255.252.0. Could that be something?
The Subnet mask under IPV4 is obtained by the ISP while the LAN subnet is set by Deco. They can be different and you can also customize the LAN subnet per needs. The default "255.255.252.0" is intended to cover enough local IP addresses. (192.168.68.xxx-192.168.71.xxx)
Best regards.
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So I was talking with my boss and he also noticed the mismatch of Subnet Mask between ISP (255.255.240.0) and LAN (255.255.252.0). He mentioned due to this computers on the LAN are unable to see Broadcast packets so he advised me to change my LAN Subnest Mask to the same from ISP. I have not tried this yet but plan to maybe this weekend. I have also found if I Reserver all the IPs I want to track to then within Pihole make them Clients and entries into Local DNS at least Hostnames show now.
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Thanks for the update.
It is not suggested to set the LAN subnet to 255.255.240.0, but you can set it to 255.255.255.0 which is a more commonly used subnet range.
For one ISP, there might be thousands or even mission users so its subnet mask is usually wider enough to handle as many customers as possible. But for a Home Network, 192.168.68.1/ 255.255.252.0(~about 1022 IP addresses) or 255.255.255.0(~254 IP addresses) are already good enough for the connected devices.
Best regards.
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