UDP traffic

Datagrams matching port:2900 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

Datagrams

Source addresses

Networks

Countries

Destination ports

Traffic by type

Service queries

4 datagrams from 4 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.

SSDP 4

Latest SSDP datagram, to 2900/udp

M-SEARCH * HTTP/1.1 Host:239.255.255.250:1900 ST:upnp:rootdevice Man:"ssdp:discover" MX:3

payload bytes

00000000  4d 2d 53 45 41 52 43 48  20 2a 20 48 54 54 50 2f  |M-SEARCH * HTTP/|
00000010  31 2e 31 0d 0a 48 6f 73  74 3a 32 33 39 2e 32 35  |1.1..Host:239.25|
00000020  35 2e 32 35 35 2e 32 35  30 3a 31 39 30 30 0d 0a  |5.255.250:1900..|
00000030  53 54 3a 75 70 6e 70 3a  72 6f 6f 74 64 65 76 69  |ST:upnp:rootdevi|
00000040  63 65 0d 0a 4d 61 6e 3a  22 73 73 64 70 3a 64 69  |ce..Man:"ssdp:di|
00000050  73 63 6f 76 65 72 22 0d  0a 4d 58 3a 33 0d 0a 0d  |scover"..MX:3...|
00000060  0a                                                |.|

Unrecognised

1 datagrams from 1 source

Datagrams no decoder recognised. Their first bytes are kept.

Unrecognised 1

Latest Unrecognised datagram, to 2900/udp

·|·dLd·]·K`A'(·u·\

payload bytes

00000000  a9 9d fa b2 f9 f6 90 e8  9e f7 7c 1a 64 4c 64 b5  |..........|.dLd.|
00000010  b4 98 15 d3 11 9b 5d bc  03 4b 60 41 27 28 f0 d6  |......]..K`A'(..|
00000020  75 da 5c                                          |u.\|

Amplification checks

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

Service	Port	Datagrams	Sources	Factor
SSDP	2900/udp	4	4	30.8

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

2900/udp SSDP5

Networks

AS396982 Google LLC from 4 sources4
AS26599 TELEFONICA BRASIL S.A from 1 source1

Countries

Source addresses (unverified)

Address	Network	Cc	Sends	Datagrams	Last seen (UTC)
147.185.132.224	AS396982 Google LLC	US	SSDP	1	2026-10-08 07:07
35.203.210.206	AS396982 Google LLC	GB	SSDP	1	2026-10-08 11:03
216.25.89.90	AS396982 Google LLC	US	SSDP	1	2026-10-09 11:12
152.243.95.246	AS26599 TELEFONICA BRASIL S.A	BR	Unrecognised	1	2026-10-07 05:51
162.216.149.223	AS396982 Google LLC	US	SSDP	1	2026-10-09 08:26

Latest datagrams

2026-10-09 11:12:52216.25.89.90to 2900/udpSSDPUS

M-SEARCH * HTTP/1.1 Host:239.255.255.250:1900 ST:upnp:rootdevice Man:"ssdp:discover" MX:3

payload bytes

00000000  4d 2d 53 45 41 52 43 48  20 2a 20 48 54 54 50 2f  |M-SEARCH * HTTP/|
00000010  31 2e 31 0d 0a 48 6f 73  74 3a 32 33 39 2e 32 35  |1.1..Host:239.25|
00000020  35 2e 32 35 35 2e 32 35  30 3a 31 39 30 30 0d 0a  |5.255.250:1900..|
00000030  53 54 3a 75 70 6e 70 3a  72 6f 6f 74 64 65 76 69  |ST:upnp:rootdevi|
00000040  63 65 0d 0a 4d 61 6e 3a  22 73 73 64 70 3a 64 69  |ce..Man:"ssdp:di|
00000050  73 63 6f 76 65 72 22 0d  0a 4d 58 3a 33 0d 0a 0d  |scover"..MX:3...|
00000060  0a                                                |.|

2026-10-09 08:26:07162.216.149.223to 2900/udpSSDPUS

M-SEARCH * HTTP/1.1 Host:239.255.255.250:1900 ST:upnp:rootdevice Man:"ssdp:discover" MX:3

payload bytes

00000000  4d 2d 53 45 41 52 43 48  20 2a 20 48 54 54 50 2f  |M-SEARCH * HTTP/|
00000010  31 2e 31 0d 0a 48 6f 73  74 3a 32 33 39 2e 32 35  |1.1..Host:239.25|
00000020  35 2e 32 35 35 2e 32 35  30 3a 31 39 30 30 0d 0a  |5.255.250:1900..|
00000030  53 54 3a 75 70 6e 70 3a  72 6f 6f 74 64 65 76 69  |ST:upnp:rootdevi|
00000040  63 65 0d 0a 4d 61 6e 3a  22 73 73 64 70 3a 64 69  |ce..Man:"ssdp:di|
00000050  73 63 6f 76 65 72 22 0d  0a 4d 58 3a 33 0d 0a 0d  |scover"..MX:3...|
00000060  0a                                                |.|

2026-10-08 11:03:1935.203.210.206to 2900/udpSSDPGB

M-SEARCH * HTTP/1.1 Host:239.255.255.250:1900 ST:upnp:rootdevice Man:"ssdp:discover" MX:3

payload bytes

00000000  4d 2d 53 45 41 52 43 48  20 2a 20 48 54 54 50 2f  |M-SEARCH * HTTP/|
00000010  31 2e 31 0d 0a 48 6f 73  74 3a 32 33 39 2e 32 35  |1.1..Host:239.25|
00000020  35 2e 32 35 35 2e 32 35  30 3a 31 39 30 30 0d 0a  |5.255.250:1900..|
00000030  53 54 3a 75 70 6e 70 3a  72 6f 6f 74 64 65 76 69  |ST:upnp:rootdevi|
00000040  63 65 0d 0a 4d 61 6e 3a  22 73 73 64 70 3a 64 69  |ce..Man:"ssdp:di|
00000050  73 63 6f 76 65 72 22 0d  0a 4d 58 3a 33 0d 0a 0d  |scover"..MX:3...|
00000060  0a                                                |.|

2026-10-08 07:07:27147.185.132.224to 2900/udpSSDPUS

M-SEARCH * HTTP/1.1 Host:239.255.255.250:1900 ST:upnp:rootdevice Man:"ssdp:discover" MX:3

payload bytes

00000000  4d 2d 53 45 41 52 43 48  20 2a 20 48 54 54 50 2f  |M-SEARCH * HTTP/|
00000010  31 2e 31 0d 0a 48 6f 73  74 3a 32 33 39 2e 32 35  |1.1..Host:239.25|
00000020  35 2e 32 35 35 2e 32 35  30 3a 31 39 30 30 0d 0a  |5.255.250:1900..|
00000030  53 54 3a 75 70 6e 70 3a  72 6f 6f 74 64 65 76 69  |ST:upnp:rootdevi|
00000040  63 65 0d 0a 4d 61 6e 3a  22 73 73 64 70 3a 64 69  |ce..Man:"ssdp:di|
00000050  73 63 6f 76 65 72 22 0d  0a 4d 58 3a 33 0d 0a 0d  |scover"..MX:3...|
00000060  0a                                                |.|

2026-10-07 05:51:29152.243.95.246to 2900/udpUnrecognisedBR

·|·dLd·]·K`A'(·u·\

payload bytes

00000000  a9 9d fa b2 f9 f6 90 e8  9e f7 7c 1a 64 4c 64 b5  |..........|.dLd.|
00000010  b4 98 15 d3 11 9b 5d bc  03 4b 60 41 27 28 f0 d6  |......]..K`A'(..|
00000020  75 da 5c                                          |u.\|