LAN (Local Area Network)

A Local Area Network connects devices within a small geographic area, a home, office, or building, typically using Ethernet and Wi-Fi at speeds from 100 Mbit/s to 100 Gbit/s. LAN security relies on segmentation (VLANs), 802.1X port authentication, and protection of shared services such as DHCP and DNS from internal abuse.

Categories: Security ControlsThreats and AttacksInternet and Routing

LAN in context

Security controls in telecom span signaling firewalls (SS7/Diameter/GTP screening at the network edge), transport encryption (IPsec, TLS, PRINS), identity and access on OSS/BSS, and monitoring at both the packet and log level. Controls are audited against GSMA FS.11/FS.19/FS.20/FS.36 and, in Europe, NIS2 sectoral rules.

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.

To place LAN in the wider telecom-security picture, review MAC Filtering, Egress, IDS, SIM, Slice Security and CSIRT.

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