ISP operations journal

Guides for running a better ISP

Practical articles from the ISPbills team on billing, RADIUS, fiber, network operations and growth.

ISPbills

ISP Networking

ISP VLAN Network Design: Segmentation & Traffic Isolation with MikroTik

Design a scalable ISP network using VLANs on MikroTik — subscriber isolation, management VLAN, OLT VLAN, and inter-VLAN routing for security and performance.

By ISPbills Editorial Team · July 21, 2026 · Read article →

ISPbills

MikroTik

CGNAT for ISPs: Configuration, Logging & Subscriber Tracking on MikroTik

A practical CGNAT guide for ISPs on MikroTik — choosing port-block sizes, configuring src-nat, deterministic vs stateful logging, subscriber tracking for legal requests, and IPv4 conservation strategy.

By ISPbills Editorial Team · July 21, 2026 · Read article →