/etc/dns2tcpd.conf is in dns2tcp 0.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | listen = 127.0.0.1
port = 53
# If you change this value, also change the USER variable in /etc/default/dns2tcpd
user = nobody
chroot = /tmp
domain = your.domain.tld
resources = ssh:127.0.0.1:22 , smtp:127.0.0.1:25
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