APN (Access Point Name)

In telecommunications, the APN is the identifier used in 2G/3G/4G networks to determine which external data network a PDP/PDN connection terminates on, along with associated QoS and authentication settings. It is the LTE-era equivalent of the 5G DNN.

Categories: Security ControlsInternet and Routing

APN in context

Security controls span signaling firewalls (SS7/Diameter/GTP screening), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36.

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

To place APN in the wider telecom-security picture, review 3G, A5/1, ASN, Authorization, BGP Hijacking and Decryption — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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