RRSIG tcp53.ch/NS alg 13, id 44444: The cryptographic signature of the RRSIG RR does not properly validate. See RFC 4035, Sec. 5.3.3.
tcp53.ch/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2a03:4000:46:320:3870:c9ff:fec8:dc1a, UDP_-_NOEDNS_)