Asad Ijaz
Lead Networking Architect and Editor at NetworkUstad. CCNP and CCNA certified, with 10+ years of experience in enterprise network design, implementation, and troubleshooting. Writes practical tutorials on routing, IPv4 management, network automation, and security fundamentals.
Is Someone Spying on Your Phone? How to Detect and Safely Remove Stalkerware
If you have a nagging feeling that a partner, ex, or family member knows too much — where you’ve been, who you’ve messaged, things you only said in a “private” chat — you may not be imagining it. Stalkerware is software secretly installed on a phone to monitor everything on it: messages (including WhatsApp and...
What Happened to Z-Library — and 8 Legal Ways to Download Free Books in 2026
If you’ve searched for Z-Library recently and found seized domains, dead links, or a confusing maze of mirror sites, you’re not alone. The site that millions of people once used to download free books has been in legal limbo since late 2022, and the situation hasn’t gotten simpler. This guide explains, plainly, what actually happened...
How to Verify Someone You Met Online Before You Meet in Person
You matched on a dating app three weeks ago. The conversation has been good — funny, easy, the kind that makes you check your phone more than you’d admit. Now they’ve suggested dinner on Friday. And somewhere under the excitement is a quieter, sensible question: do I actually know who this person is? You’re right...
CloudSEK BeVigil: External Attack Surface Monitoring for Network Engineers
Internet-facing infrastructure accumulates faster than anyone’s records of it. Subdomains outlive the campaigns that created them, staging APIs stay reachable after launch, and certificates renew on assets nobody remembers owning. Much of that estate, the DNS zones, the certificates, the open ports, the edge devices, is infrastructure network engineers built and still maintain, which is...
Network Troubleshooting Commands: The Complete Guide for IT Professionals (2026)
This comprehensive guide equips IT professionals with every essential network troubleshooting command across Windows, Linux, and Cisco IOS. Learn the OSI bottom-up methodology, command syntax, real output interpretation, and systematic workflows that transform complex network problems into solved incidents.
What Investors Should Know About Cybersecurity Before Using Fintech Apps
Fintech apps have made investing feel almost too easy. Open an account, link a bank card, scan a few charts, tap a button, and suddenly money is moving. That speed is useful. It also creates risk. Investors often spend hours comparing fees, returns, charts, and asset classes, then spend very little time thinking about account...
Residential Proxies vs Datacenter Proxies in 2026: What ColdProxy’s Infrastructure Tells Us About the IPv6 Shift
There is a version of the proxy conversation that most networking professionals find easy to dismiss — the consumer-facing narrative about anonymity, bypass tools, and surface-level privacy. That conversation is real, but it is not the one that matters most to IT teams building automated workflows, running geo-distributed monitoring infrastructure, or trying to understand how...
How to Keep Your Tech Safe While Traveling
Traveling with gadgets is essential but risky. This guide covers digital security with VPNs, physical device protection, and practical habits to keep your tech and data safe, ensuring your trip stays worry-free.
How to Buy IPv4 Addresses in 2026: A Practical Guide
Despite years of talk about IPv6, the internet still runs heavily on IPv4, and demand for those addresses has not gone away. With the original pool long exhausted, organizations that need more address space now turn to a secondary market to acquire it. If your network is expanding, understanding how to buy IPv4 addresses safely...
The Top IPv4 Address Brokers in 2026: Ranked and Compared
The bottom line: With IPv4 addresses long exhausted at the source, every broadband buildout, cloud expansion, and new network now depends on the secondary transfer market. Choosing the right broker affects how fast your transfer closes, how clean your addresses are, and how much risk you carry. This guide ranks and compares the leading IPv4...