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Home Archives for cloud, edge and everything in between administration and orchestration mail servers

Some things never change. Love it or hate it, but everyone still needs email.

WordPress Says Your Host May Have Disabled The mail() Function. Here Is How to Fix It.

Cloud Insidr 2016-02-14 5 Comments

WordPress Says Your Host May Have Disabled The mail() Function. Here Is How to Fix It.

Some WordPress installations stubbornly refuse requests for a password reset link, showing the user this error message instead:

The email could not be sent.
Possible reason: your host may have disabled the mail() function.

WordPress’ error massage is anything but insightful. The underlying cause usually involves SELinux. Let us introduce you to an easy fix that does not involve plug-ins or external email services. Buckle up.

[Read more…]

Filed Under: administration and orchestration, cloud, edge and everything in between, mail servers, NGINX, web servers in the cloud Tagged With: NGINX, postfix, SELinux, WordPress

How to set up Letsencrypt certificates on AWS EC2

Anna E Kobylinska 2016-02-10 4 Comments

How to set up Letsencrypt certificates on AWS EC2

[updated 2018-06-12] As browser makers continue their push for HTTPS and mobile applications are becoming the target of MITM (man-in-the-middle) attacks, cloud developers and administrators are scrambling to find affordable SSL certificates that can live up to the demands of the cloud era. Enter Let’s Encrypt, a new Certificate Authority that is open, fully automated, and free to use, with an almost unprecedented, generous allotment of 100 host names per certificate. Let’s Encrypt delivers on the promise of a worry-free, fully encrypted web 3.0. Cloud Insidr lifts the veil off of Let’s Encrypt’s setup, configuration, its few surprises and hidden gems.

[Read more…]

Filed Under: administration and orchestration, cloud, edge and everything in between, cybersecurity and cyber warfare, encryption, mail servers, NGINX, web servers in the cloud Tagged With: certbot, certificate, letsencrypt, RSA, SSL

How to Use Letsencrypt across Servers in the Manual Configuration Mode with a CSR

Anna E Kobylinska 2016-02-10 2 Comments

How to Use Letsencrypt across Servers in the Manual Configuration Mode with a CSR

Generating SSL certificates when Letsencrypt (what is Letsencrypt, who is behind it, and how the heck can you get started) is available for your system works in a breeze, but what if you need your certificates for a machine that won’t take Letsencrypt (for whatever reason)? It is still possible: you can either grab Letsencrypt from Git, or, for reasons of practicality… create a certificate signing request (CSR) on your target server, transfer it to your letsencrypt instance, generate the certificates you need, then transfer the generated files back to your target instance and install the certificates in your software.

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Filed Under: administration and orchestration, cybersecurity and cyber warfare, encryption, mail servers, web servers in the cloud Tagged With: CSR, encryption, SSL

Quick Tip: Flush the DNS Resolver Cache on Your Computer when Changing DNS Configuration

Filipe Martins 2016-01-12 Leave a Comment

Quick Tip: Flush the DNS Resolver Cache on Your Computer when Changing DNS Configuration

When migrating a web service or adjusting DNS settings you may come across unexpected behavior of your site long after all errors have been fixed (or so you thought before hitting the Reload button). The hard reality is that in their quest for speed, web browsers try not to make new DNS requests they deem unnecessary. The result is much screaming&steaming from administrators who are in the middle of a job.

[Read more…]

Filed Under: administration and orchestration, cloud, edge and everything in between, mail servers, web servers in the cloud Tagged With: cache, DNS, PowerShell

Tip of the Day: How to Extract Domain Names from Email Addresses using Regular Expressions (RegEX)

Cloud Insidr 2015-11-26 Leave a Comment

Tip of the Day: How to Extract Domain Names from Email Addresses using Regular Expressions (RegEX)

Extracting domain names from email addresses with the help of regular expressions takes just a nanosecond once you have the formula. The formula is the key.

[Read more…]

Filed Under: administration and orchestration, mail servers Tagged With: anti-spam defense, Notepad++, RegEx, regular expression

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