8 articles in IT & infrastructure
How to Prevent Shadow IP Assignments in Enterprise Networks
In an enterprise network, an IP address can appear on a device without a request, approval, or IPAM record. These shadow assignments create conflicts, complicate incident investigations…
IT & infrastructureHardening edge routers and firewalls: a practical checklist
A practical hardening checklist for edge routers and firewalls: management plane, AAA, control-plane policing, BGP session protection, logging and backups.
IT & infrastructureWhat an infrastructure audit covers in its first two weeks
What a two-week infrastructure audit should cover, from inventory and network diagrams to backups, access and monitoring, and what you should receive.
IT & infrastructureA monitoring stack for small ISPs and hosting companies
What a small ISP or hosting company should monitor, from BGP and RPKI to blacklists and certificates, and how to run alerting and on-call.
IT & infrastructureRemote infrastructure management: what to outsource and what to keep in-house
How to decide which infrastructure tasks to hand to a remote management provider, which to keep in-house, and what the contract must cover.
IT & infrastructureIP Address Lifecycle Management: From Request to Retirement
An IP address passes through request, approval, allocation, assignment, active use, reclamation, and retirement. Without a common policy and inventory, a company can lose track of who uses…
IT & infrastructureAutomating rDNS Updates Without Losing Change Control
Reverse DNS changes affect mail reputation, logging, abuse handling, and customer trust. Automation can reduce manual work, but it must not bypass approvals, naming policy, ownership…
IT & infrastructureIPv4 and Zero Trust: Addressing for Segmented Access
Modern networks use segmentation to reduce attack surfaces and control access between different resources. IPv4 addressing remains an important part of this approach because logical address…