/usr/share/doc/dns2tcp/examples/dns2tcpdrc 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 8 9 10 11 | # config file
listen = 127.0.0.1
port = 53
user=nobody
chroot = /var/empty/dns2tcp/
pid_file = /var/run/dns2tcp.pid
domain = dns2tcp.hsc.fr
key = blah
resources = ssh:127.0.0.1:22 , smtp:127.0.0.1:25,
pop3:10.0.0.1:110
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