UDP traffic
Datagrams matching port:21422 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.
Your plan searches up to 7d, so 30d was shortened. Plans
1
Datagrams
1
Source addresses
1
Networks
1
Countries
1
Destination ports
Traffic by type
Service queries
1 datagrams from 1 sourceRequests 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.
Latest CLDAP datagram, to 21422/udp
payload bytes
00000000 30 84 00 00 00 2d 02 01 01 63 84 00 00 00 24 04 |0....-...c....$.| 00000010 00 0a 01 00 0a 01 00 02 01 00 02 01 00 01 01 00 |................| 00000020 87 0b 6f 62 6a 65 63 74 63 6c 61 73 73 30 84 00 |..objectclass0..| 00000030 00 00 00 00 0a |.....|
Amplification checks
Probes for services that answer a small request with a much larger reply, the property reflection attacks rely on.
| Service | Port | Datagrams | Sources | Factor |
|---|---|---|---|---|
| CLDAP | 21422/udp | 1 | 1 | 56 to 70 |
The factor is how many bytes a reachable server can send back for each byte it receives, as published by CISA in alert TA14-017A.
Source addresses (unverified)
| Address | Network | Cc | Sends | Datagrams | Last seen (UTC) |
|---|---|---|---|---|---|
| 66.132.172.248 | AS398324 Censys, Inc. | US | CLDAP | 1 | 2026-10-09 21:54 |
Latest datagrams
payload bytes
00000000 30 84 00 00 00 2d 02 01 01 63 84 00 00 00 24 04 |0....-...c....$.| 00000010 00 0a 01 00 0a 01 00 02 01 00 02 01 00 01 01 00 |................| 00000020 87 0b 6f 62 6a 65 63 74 63 6c 61 73 73 30 84 00 |..objectclass0..| 00000030 00 00 00 00 0a |.....|