Overview

Linux Networking for Telecom teaches the Linux networking a telecom engineer needs, framed with telecom examples throughout. It starts with the kernel network model and interface configuration with iproute2, then IPv4 and IPv6 addressing, routing and policy routing for multi-homed hosts, and the socket layer, where SCTP gets first-class treatment because it carries SS7 signalling and Diameter. It covers DNS, DHCP and time synchronisation, firewalling with nftables, and virtual networking with namespaces, veth pairs, bridges and VLANs. Later modules cover tunnels and VPNs, including GRE, IPsec, WireGuard and the GTP user-plane tunnel, observability with tcpdump, tshark and ss, and performance and troubleshooting. It ends with an interactive walkthrough that diagnoses a broken telecom host layer by layer. The course teaches the Linux and socket layer under the protocols; it points to the signalling and mobile courses for the protocols themselves.

Learning Objectives

Configure and inspect Linux network interfaces with iproute2, including state, MTU and neighbour resolution

Plan and assign IPv4 and IPv6 addressing on a dual-stack telecom host

Build routing and policy routing for a multi-homed host with separate signalling, media and management paths

Explain the socket layer and use SCTP multi-homing and multi-streaming as the transport under SS7 and Diameter

Configure DNS, DHCP and time synchronisation, including why mobile networks need precise time

Write and operate an nftables ruleset, including stateful filtering and NAT, as a configuration task

Build isolated networks with namespaces, veth, bridges and VLANs, and tunnels with GRE, IPsec, WireGuard and GTP

Capture and read traffic with tcpdump and tshark, read socket and interface statistics, and troubleshoot a host layer by layer

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