SSunnyincybersecurity-learning.hashnode.dev·8h ago · 15 min readTryHackMe Passive Reconnaissance Beginner-Friendly Learning GuideIntroduction I recently completed the Passive Reconnaissance room on TryHackMe as part of my ongoing cybersecurity learning journey. Reconnaissance is one of the most important phases in cybersecurity00
KBKishore Bhavnanieindnsassistant.hashnode.dev·2d ago · 7 min readThe DNS Posture Gap Your CNAPP Doesn't CoverIf your organization has invested in a Cloud-Native Application Protection Platform, you have consolidated a genuinely impressive amount of security into one place. A modern CNAPP pulls together cloud00
TSTayyab Samiintwilightwrites.hashnode.dev·2d ago · 7 min readFirst look into AWS Part 2 The Intermediate I you have skipped part 1 I would strongly recommend reading it as we will be continuing with it. You can read it https://twilightwrites.hashnode.dev/your-first-look-to-aws Before I move into the HTTP00
KBKishore Bhavnanieindnsassistant.hashnode.dev·3d ago · 7 min readEmail Deliverability Beyond SPF, DKIM, and DMARCSPF, DKIM, and DMARC are the foundation of email authentication, and any organization serious about deliverability and anti-spoofing needs all three. But they are not the whole story. A newer set of s00
ASAnik Sikderinaniksikder.hashnode.dev·5d ago · 9 min readDNS Propagation Explained: Why DNS Changes Take Time and What Actually Happens Behind the ScenesIn the previous article, we explored: How DNS works How DNS records power websites, email systems, and cloud infrastructure At this point, a natural question emerges: If DNS changes are just reco00
ASAnik Sikderinaniksikder.hashnode.dev·5d ago · 9 min readDNS Records Explained: A, AAAA, CNAME, MX, TXT, NS, and SRV Records in Modern Internet InfrastructureIn the previous article, we explored how DNS translates human-friendly domain names into machine-friendly IP addresses and how a request travels through recursive resolvers, root servers, TLD servers,00
ASAnik Sikderinaniksikder.hashnode.dev·5d ago · 10 min readDNS Explained: The Complete Guide for Founders, Developers, and Modern BusinessesMost people don’t think about DNS until something breaks. A founder launches a new website and suddenly email stops working. A developer migrates infrastructure and traffic starts disappearing. A mark00
JPJose Pollmaninnotspoofed.hashnode.dev·6d ago · 4 min readWhy your DMARC reports never arrive (and why Gmail can't be your rua address)There is a failure mode in DMARC that is worse than a misconfiguration, because a misconfiguration at least shows up somewhere. Your record is valid. Every checker says it's fine. And you receive noth00
JPJose Pollmaninnotspoofed.hashnode.dev·6d ago · 5 min readEvery DKIM checker is guessing — including mineAlmost every DNS record you care about can be looked up. Ask for the SPF record, you get it. Ask for _dmarc, it's there. DKIM doesn't work that way, and almost nobody building tooling around it says s00
AMArnav Mahajaninarnavlogs.hashnode.dev·Aug 6 · 7 min readThe Domain That Wouldn't Move: Fighting a Ghost CNAME Across AWS AccountsI spent longer on this than I want to admit for something that, on paper, is a five-minute DNS change: point queuefree.co.in at a new CloudFront distribution. Instead I got a wall of CNAMEAlreadyExist00