Sinkhole

In telecom networks, a Sinkhole is a controlled destination (typically at the DNS or BGP layer) used to absorb traffic that would otherwise reach malicious infrastructure, allowing operators to neutralize botnet C2 and protect subscribers. Sinkholing is commonly coordinated with CSIRTs and law enforcement.

Categories: Identity and SubscriberThreats and AttacksInternet and Routing

Sinkhole in context

Subscriber identifiers (IMSI, SUPI, MSISDN, IMEI) anchor authentication, charging and lawful interception. Any protocol that leaks a permanent identifier is treated as a privacy defect, which is why 5G introduced SUCI concealment on the air interface.

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking. The common thread is that most attacks exploit the inherited trust model of legacy signaling protocols.

To place Sinkhole in the wider telecom-security picture, review SIM Box, CGNAT, SIMBox Fraud, CSIRT, Cybersecurity and Insider Threat: each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

Related topic hubs

  • Diameter Attacks S6a IDR/PUR/CLR abuse, subscriber tracking, LTE signaling attacks.

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.