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UDP traffic

Datagrams matching qname:"_services._dns-sd._udp.local" sent to HoneyLabs sensors over UDP in the last 7 days. DNS questions and QUIC client fingerprints are decoded on the sensor. Other datagrams are kept as their first bytes and labelled by protocol where it can be recognised.

A UDP source address can be forged, so each address listed here either sent the traffic or was impersonated by whoever did. UDP traffic is kept out of verdicts, feeds, watchlists and alerts.

Clear search

152

Datagrams

108

Source addresses

20

Networks

11

Countries

19

Destination ports

Traffic by type

Service queries

152 datagrams from 108 sources

Requests a service answers without a handshake. Scanners send them to find open DNS, NTP, SNMP or SSDP servers, which are also the servers reflection attacks abuse.

DNS 152

Latest DNS datagram, to 5353/udp

DNS query PTR _services._dns-sd._udp.local

payload bytes
00000000  00 00 00 00 00 01 00 00  00 00 00 00 09 5f 73 65  |............._se|
00000010  72 76 69 63 65 73 07 5f  64 6e 73 2d 73 64 04 5f  |rvices._dns-sd._|
00000020  75 64 70 05 6c 6f 63 61  6c 00 00 0c 00 01        |udp.local.....|

Amplification checks

Probes for services that answer a small request with a much larger reply, the property reflection attacks rely on.

ServicePortDatagramsSourcesFactor
mDNS5353/udp122902 to 10
DNS5351/udp +3301828 to 54

The factor is how many bytes a reachable server can send back for each byte it receives, as published by CISA in alert TA14-017A.

Destination ports

DNS questions

DNS record types

Networks

Countries

Source addresses (unverified)

AddressNetworkCcSendsDatagramsLast seen (UTC)
193.47.62.187AS216014 BestDC LimitedBGDNS262026-10-07 11:10
66.132.172.244AS398324 Censys, Inc.USDNS132026-10-10 12:54
172.104.155.101AS63949 Akamai Connected CloudDEDNS32026-10-05 16:57
16.5.0.234AS401661 EMBNEX, LLCBRDNS32026-10-05 17:01
146.88.241.70AS20052 Arbor Networks, Inc.USDNS22026-10-11 02:25
146.88.240.26AS20052 Arbor Networks, Inc.USDNS22026-10-09 08:14
146.88.241.100AS20052 Arbor Networks, Inc.USDNS22026-10-08 05:48
147.185.133.43AS396982 Google LLCUSDNS12026-10-08 04:18
198.235.24.176AS396982 Google LLCUSDNS12026-10-10 18:24
162.216.149.93AS396982 Google LLCUSDNS12026-10-10 03:40
40.74.213.21AS8075 Microsoft CorporationUSDNS12026-10-09 08:01
66.132.172.232AS398324 Censys, Inc.USDNS12026-10-06 09:54
194.164.107.4AS50219 Valence Technology Co.USDNS12026-10-05 12:59
147.185.132.39AS396982 Google LLCUSDNS12026-10-06 01:25
147.185.133.179AS396982 Google LLCUSDNS12026-10-08 16:53
147.185.133.125AS396982 Google LLCUSDNS12026-10-09 14:17
198.235.24.75AS396982 Google LLCUSDNS12026-10-09 04:24
184.105.247.235AS6939 Hurricane Electric LLCUSDNS12026-10-10 09:03
216.25.89.150AS396982 Google LLCUSDNS12026-10-08 18:02
20.150.193.100AS8075 Microsoft CorporationUSDNS12026-10-09 08:03

Latest datagrams