Pihole Local DNS not resolving

[kunalnagar]

Hi folks,

I have PiVPN working great with my Pihole IP as a DNS. I can reach the internet and my local services (running on Docker like Bitwarden etc) using an IP.

However I'm unable to reach them via CNAMEs that I created using local DNS settings in the Pihole.

Reachable: 192.168.0.200
Unreachable: bitwarden.domain.com (created using Pihole local DNS)

I'm wondering what I might be doing wrong? Thank you. Here's the output of pivpn -d:

Logs

::: Generating Debug Output
::::		PiVPN debug		 ::::
=============================================
::::		Latest commit		 ::::
Branch: master
Commit: a85d3752ef94ed1aaad70ba6d483f93583152eca
Author: Orazio
Date: Wed Dec 13 18:09:55 2023 +0100
Summary: fix(scripts): disallow using server's name as client name (#1791)
=============================================
::::	    Installation settings    	 ::::
PLAT=Raspbian
OSCN=buster
USING_UFW=0
pivpnforceipv6route=1
IPv4dev=eth0
IPv4addr=192.168.0.15/16
IPv4gw=192.168.0.1
install_user=pi
install_home=/home/pi
VPN=wireguard
pivpnPORT=51820
pivpnDNS1=192.168.0.15
pivpnDNS2=
pivpnHOST=REDACTED
INPUT_CHAIN_EDITED=0
FORWARD_CHAIN_EDITED=1
INPUT_CHAIN_EDITEDv6=
FORWARD_CHAIN_EDITEDv6=
pivpnPROTO=udp
pivpnMTU=1420
pivpnDEV=wg0
pivpnNET=10.26.33.0
subnetClass=24
pivpnenableipv6=0
ALLOWED_IPS="0.0.0.0/0, ::0/0"
UNATTUPG=1
INSTALLED_PACKAGES=()
=============================================
::::  Server configuration shown below   ::::
[Interface]
PrivateKey = server_priv
Address = 10.26.33.1/24
MTU = 1420
ListenPort = 51820
### begin kunalnagar ###
[Peer]
PublicKey = kunalnagar_pub
PresharedKey = kunalnagar_psk
AllowedIPs = 10.26.33.2/32
### end kunalnagar ###
=============================================
::::  Client configuration shown below   ::::
[Interface]
PrivateKey = kunalnagar_priv
Address = 10.26.33.2/24
DNS = 192.168.0.15

[Peer]
PublicKey = server_pub
PresharedKey = kunalnagar_psk
Endpoint = REDACTED:51820
AllowedIPs = 0.0.0.0/0, ::0/0
=============================================
:::: 	Recursive list of files in	 ::::
::::	/etc/wireguard shown below	 ::::
/etc/wireguard:
configs
keys
wg0.conf

/etc/wireguard/configs:
clients.txt
kunalnagar.conf

/etc/wireguard/keys:
kunalnagar_priv
kunalnagar_psk
kunalnagar_pub
server_priv
server_pub
=============================================
::::		Self check		 ::::
:: [OK] IP forwarding is enabled
:: [OK] Iptables MASQUERADE rule set
:: [OK] Iptables FORWARD rule set
:: [OK] WireGuard is running
:: [OK] WireGuard is enabled 
(it will automatically start on reboot)
:: [OK] WireGuard is listening on port 51820/udp
=============================================
:::: Having trouble connecting? Take a look at the FAQ:
:::: https://docs.pivpn.io/faq
=============================================
:::: WARNING: This script should have automatically masked sensitive       ::::
:::: information, however, still make sure that PrivateKey, PublicKey      ::::
:::: and PresharedKey are masked before reporting an issue. An example key ::::
:::: that you should NOT see in this log looks like this:                  ::::
:::: YIAoJVsdIeyvXfGGDDadHh6AxsMRymZTnnzZoAb9cxRe                          ::::
=============================================
::::		Debug complete		 ::::
::: 
::: Debug output completed above.
::: Copy saved to /tmp/debug.log
:::