Using and supporting GNU/Linux and Open Source Software. Usando y brindando soporte sobre GNU/Linux y software de fuente libre.
Ramos Mejía, Argentina
Joined April 2010
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Salieron parches para PHP2Shell: dos fallas críticas (CVSS 4.0: 9.2) que pueden permitir ejecutar código sin autenticación.
Aviso y versiones: php.net/archive/2026.php#202…
Un servidor puede funcionar perfectamente y aun así ser vulnerable.
Actualizar tiene que ser rutina.
The WordPress REST API is not something you should automatically disable.
Modern WordPress depends on it.
How do I secure the WordPress REST API without breaking WordPress?
axrglobal.com/wordpress-rest…
Should you block /wp-json/ to make WordPress more secure?
Probably not.
The REST API powers parts of WordPress you probably don't want to break.
If your site is down, don't touch DNS blindly. Follow the chain.
More on this → axrglobal.com
How many times did you "fix" DNS when the real issue was something else? 👇
DNS can resolve perfectly while the real problem is something else:
— server is down
— SSL misconfigured
— hosting account suspended
— app throwing errors
DNS is the messenger, not the message.
Why do two people see different things on the same domain?
Caching. Resolvers hold onto the answer based on TTL. Nobody's "wrong" — they just haven't seen the change yet.
Golden rule: make one change, document it, wait, then test.
Step 3: match the symptom to the record.
❌ Email broken, website works → check MX, SPF, DKIM, DMARC
❌ "www" broken, root domain works → check the CNAME/A for www
❌ Old site still showing → that's caching, not the record
Step 2: check the nameservers.
Classic migration mistake: you moved the site to a new host, but the domain is still pointing at the old host's nameservers.
Result: your new A record doesn't exist for anyone.
Step 1: check the domain.
Is it active? Is auto-renewal set up? Do you have access to the registrar account?
Without this, you can't touch anything else. It's the foundation.
The chain has 5 links. If you don't figure out which one broke, you'll end up "fixing" something that was never broken:
Domain → Nameserver → DNS record → Service → Cache
Your website is down.
Before you touch a single DNS record, ask yourself: is DNS actually the problem?
A thread on diagnosing it properly 🧵👇
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