pdnsd as a proxy (tcp) (use root dns) (break GFW)

pdnsd.conf

global {
	perm_cache=4096;
	run_ipv4=off;
	cache_dir=/var/cache/pdnsd;
	server_ip = ::1;
	server_port = 53;
	query_method=tcp_only;
	min_ttl=10m;
	max_ttl=1w;
	timeout=10;
	udpbufsize=1024;
}
server {
	label= "dns";
	ip = 2001:7fe::53, 2001:503:c27::2:30, 2001:7fd::1;
	timeout=4s;
	uptest=ping;
	purge_cache=off;
}
source {
	ttl=5;
	owner="localhost.";
	serve_aliases=on;
	file="/etc/hosts";
}