edns512tcp=connection-refused

Hi,

Looking at this point:

https://gitlab.isc.org/isc-projects/DNS-Compliance-Testing/blob/master/genreport.c

if (n == -1) {
		if (errno == ECONNRESET)
			addtag(item, "reset");
		else if (errno == ECONNREFUSED)
			addtag(item, "connection-refused");
		else
			addtag(item, "failed");
		close(fd);
		item->summary->allok = 0;
		item->summary->seenfailure = 1;
		freeitem(item);
		return;
	}

Looks like you didn't have virtual circuit (TCP port 53) opened to virtual circuit test kind.

Regards