GuideNetworking
Why Chrome Says “Not Secure” (and What to Check First)
HTTP pages, mixed content, name-mismatch certificates, and expired TLS. How to tell a padlock problem from a DNS problem without scanning hosts you do not own.
12 min read
DevOkk Blog
Guides that send you to the right tool
How-to articles, category roundups, and fair competitor comparisons for browser-based, privacy-first utilities. Files stay on your device unless a network lookup is the actual job.
GuideNetworking
How to Check Security Headers on a Live Site
CSP, HSTS, X-Frame-Options, cookies, and noindex - what to look for in HTTP headers, how a header viewer helps, and what it will never prove.
7 min read
GuideNetworking
Why Your DNS Change Isn’t Showing Yet
You updated A or CNAME records but the site still hits the old server. TTL, cache, recursive resolvers, and how to look up public DNS without confusing it with your laptop’s cache.
7 min read
RoundupNetworking
Best Free Networking Diagnostic Tools
DNS, SSL, ping, headers, and IP lookups for debugging. Clear notes on what must leave your browser to query the public internet.
6 min read
GuideNetworking
How DNS Records Work: A, AAAA, MX, CNAME, and TXT
Read public DNS records to debug domains. Lookups send the hostname to resolve them.
5 min read
GuideNetworking
How to Find a Website's IP Address
Resolve a hostname to A/AAAA addresses for debugging.
4 min read
GuideNetworking
How SSL Certificates Work and How to Check Expiry
TLS basics and a public certificate check. The hostname is sent to complete the lookup.
4 min read
GuideNetworking
How to Read HTTP Headers When Debugging a Site
Cache, cookies, CORS, and security headers from a live response.
4 min read
GuideNetworking
How to Run a Ping Test and Read Latency
What ping measures, what it does not, and how to read the result.
4 min read
GuideNetworking
What Reverse DNS (PTR) Records Tell You
PTR lookups map IPv4 to a hostname. The address is sent to perform the lookup.
4 min read
GuideNetworking
A Practical WCAG Checklist You Can Run in the Browser
Accessible names, contrast, and structure checks you can run while you build.
4 min read
GuideNetworking
How Lazy Loading Images Affects Page Speed
Lazy-load vs LCP trade-offs, with a browser tester for your markup.
4 min read