DDoS Reflection (Reflection/Amplification Denial-of-Service Attack)

Also known as: Reflection Attack, Amplification Attack

A reflection DDoS spoofs the victim's IP as the source of requests sent to open UDP-based services (DNS, NTP, memcached, SSDP, chargen), which reply to the victim with larger responses — amplifying the attack by factors up to ~50,000x. Telecom exposure includes exposed Diameter/GTP/SIP endpoints, roaming DNS, and IPX-facing NEF/SEPP interfaces if BCP38 ingress filtering is missing.

Categories: Threats and AttacksInternet and Routing

DDoS Reflection in context

Telecom threats range from opportunistic SMS phishing and SIM swap to nation-state grade location tracking and lawful-interception abuse. The common thread is that most attacks exploit the inherited trust model of legacy signaling. SS7 and Diameter were designed for a closed operator community that no longer exists.

Telecom networks depend on Internet-style routing (BGP, DNS, MPLS) for interconnect, transport and application delivery. Route hijacks and DNS abuse can degrade or intercept signaling as easily as any application-layer attack, which is why RPKI and DNSSEC are now standard hardening for carrier networks.

To place DDoS Reflection in the wider telecom-security picture, review Egress, IDS, BGP Hijacking, Cybersecurity, DDoS and Exposure Mapping.

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