DNS noise

Fri Apr 6 17:41:48 UTC 2012

Anyone else seeing this sort of noise lately?

10:35:00.958556 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:00.961055 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:01.262461 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:01.350979 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:01.351001 IP 66.171.180.48 > 72.20.23.24: ICMP 66.171.180.48 udp port 53 unreachable, length 74
10:35:01.573166 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:01.573204 IP 66.171.180.48 > 72.20.23.19: ICMP 66.171.180.48 udp port 53 unreachable, length 74
10:35:01.730128 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:01.970730 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:02.121218 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:02.374853 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:02.374879 IP 66.171.180.48 > 72.20.23.19: ICMP 66.171.180.48 udp port 53 unreachable, length 74
10:35:02.493257 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:02.493270 IP 66.171.180.48 > 72.20.23.24: ICMP 66.171.180.48 udp port 53 unreachable, length 74
10:35:02.726303 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:02.863667 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:03.023693 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:03.251935 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:03.251964 IP 66.171.180.48 > 72.20.23.24: ICMP 66.171.180.48 udp port 53 unreachable, length 74
10:35:03.326562 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:03.630514 IP 72.20.23.24.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)
10:35:03.638327 IP 72.20.23.19.53 > 66.171.180.48.53: 952+ [1au] ANY? ripe.net. (38)

Note that the server involved does not run a DNS daemon, or listen on 53, or anything else that would attract attention.