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UDP traffic

Datagrams matching port:623 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

109

Datagrams

51

Source addresses

15

Networks

9

Countries

1

Destination ports

Traffic by type

Service queries

18 datagrams from 15 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 18

Latest DNS datagram, to 623/udp

· ·ȁ·8·

payload bytes
00000000  06 00 ff 07 00 00 00 00  00 00 00 00 00 09 20 18  |.............. .|
00000010  c8 81 00 38 8e 04 b5                              |...8...|

Unrecognised

91 datagrams from 36 sources

Datagrams no decoder recognised. Their first bytes are kept.

Unrecognised 91

Latest Unrecognised datagram, to 623/udp

·0·00·000

payload bytes
00000000  06 30 ff 06 30 30 11 be  80 30 30 30              |.0..00...000|

Amplification checks

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

ServicePortDatagramsSourcesFactor
DNS623/udp181528 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

Networks

Countries

Source addresses (unverified)

AddressNetworkCcSendsDatagramsLast seen (UTC)
104.237.240.112AS16628 DedFiberCoUSUnrecognised532026-10-07 16:25
146.88.241.20AS20052 Arbor Networks, Inc.USDNS32026-10-06 09:07
47.250.83.149AS45102 Alibaba (US) Technology Co., Ltd.MYUnrecognised22026-10-09 20:19
167.99.224.157AS14061 DigitalOcean, LLCUSUnrecognised22026-10-11 04:32
16.5.0.234AS401661 EMBNEX, LLCBRDNS22026-10-05 19:11
47.250.120.163AS45102 Alibaba (US) Technology Co., Ltd.MYUnrecognised22026-10-07 11:19
64.62.156.78AS6939 Hurricane Electric LLCUSDNS12026-10-06 05:46
64.62.156.45AS6939 Hurricane Electric LLCUSUnrecognised12026-10-08 00:24
74.249.131.245AS8075 Microsoft CorporationUSUnrecognised12026-10-08 13:12
109.105.210.65AS21859 Zenlayer IncPTUnrecognised12026-10-09 08:13
64.62.156.64AS6939 Hurricane Electric LLCUSDNS12026-10-06 08:28
71.6.233.2AS10439 CariNet, Inc.USDNS12026-10-06 07:10
64.62.156.24AS6939 Hurricane Electric LLCUSUnrecognised12026-10-11 01:47
20.163.35.252AS8075 Microsoft CorporationUSUnrecognised12026-10-08 13:13
40.124.84.87AS8075 Microsoft CorporationUSDNS12026-10-05 22:07
65.49.1.68AS6939 Hurricane Electric LLCUSUnrecognised12026-10-07 06:41
65.49.1.45AS6939 Hurricane Electric LLCUSUnrecognised12026-10-09 03:27
152.32.206.83AS135377 UCLOUD INFORMATION TECHNOLOGY (HK) LIMITUSUnrecognised12026-10-09 17:53
65.49.1.38AS6939 Hurricane Electric LLCUSUnrecognised12026-10-09 04:01
65.49.1.70AS6939 Hurricane Electric LLCUSUnrecognised12026-10-07 06:10

Latest datagrams