given the fact that it is udp/53 (dns client traffic), i would suspect that it is related to the DNS root servers. Unless you have configured a dedicated forwarder, you get one or more of those. they are listed at Root Server Technical Operations Assn
given the fact that it is udp/53 (dns client traffic), i would suspect that it is related to the DNS root servers. Unless you have configured a dedicated forwarder, you get one or more of those. they are listed at Root Server Technical Operations Assn