Patch compliance tracker
A report showing which servers are behind on security updates, and by how long.
Tech Core
Technology, Infrastructure & Innovation
A working notebook for technology projects, infrastructure lessons, and practical knowledge from the field: networks, cloud, security, and the systems that keep everything running.
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Nine areas, with networking and infrastructure at the center.
- Networking Routing, switching, DNS, firewalls, and troubleshooting. 1 article
- Infrastructure Servers, storage, virtualization, and data centers.
- Cybersecurity SOC work, vulnerability management, and Zero Trust. 1 article
- Cloud computing Azure, AWS, Google Cloud, and hybrid setups.
- Linux and Windows System administration, hardening, and monitoring. 1 article
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All insightsCheck DNS before blaming the network
Many "the network is slow" tickets come down to slow or failing DNS lookups. Here's a practical order for ruling DNS out in minutes.
Where Zero Trust actually starts
Zero Trust isn't a product you buy. It starts with three unglamorous pieces of groundwork most organizations already half-have.
When a Linux disk fills up: a calm checklist
A full disk takes services down in confusing ways. This is the order I check things in, including the deleted-but-open file trap.
Latest on X
All postsكثير من حالات «الشبكة بطيئة» يكون سببها زمن استجابة DNS وليس الرابط نفسه. قياس الاستعلام بـ dig قبل أي شيء يختصر وقت التشخيص كثيرًا.
Original post in Arabic
Translation — not part of the original post
Many "the network is slow" cases turn out to be DNS latency, not the link itself. Measuring the lookup with dig first cuts troubleshooting time a lot.
MTU mismatches rarely break everything. They break the big packets: pings pass, small pages load, and file transfers stall. That pattern alone is a strong hint.