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SELinux contexts for WordPress

Correcting SELinux security contexts: how to adjust SELinux labels on your file system

In an administrator’s quest to get stuff done, SELinux tends to get in the way. It is being perceived as a nuisance rather than a feature and this happens mostly for only one reason: setting correct SELinux labels requires the ability to figure out the appropriate SELinux security contexts. Here is how to do it.

Windmill by Donations_are_appreciated/Pixabay.com - Carabo Spain

Set up logrotate for Postfix

Finding errors in a postfix log file is tedious work. The job gets even more complicated if you have to dig through old postfix log files which might no longer be relevant. logrotate comes to the rescue, but only if you configure it correctly.  Here is how you can do it on Fedora.

Grade A+ by SOPHOS for a flawless configuration of the website cyber security headers

Fixing your Web Server’s Security Headers: From Hall of Shame to Hall of Fame

[Updated 2020-12-04] This post explains how to set up robust security headers in NGINX to protect your web application from malicious payloads and other forms of attacks. Choose your HTTP(S) headers wisely.

security locks

Cannot sign in to AWS as IAM user with MFA? How to resync your MFA token generator

Problems signing in to AWS? When the login page “Sign in as IAM user” repeatedly says: “Your authentication information is incorrect. Please try again” though you entered correct information, your Gemalto token generator for MFA authentication could be out of sync.

image by Zak Sakata on Unsplash

Tip of the day: domain intelligence services by CentralOps

Here is one nifty service that can dig up useful information about a website, a domain or an IP address and it doesn’t cost a dime.

lighthouse

Running Microsoft Azure In Your Own Data Center

In the stormy race of the digital transformation, the hybrid landscape of corporate IT is increasingly evading manageability. Could the control plane of a hyperscaler provide a lasting remedy? Would you need special hardware?

How to flash the Netgear Nighthawk X10 R9000 with DD-WRT without bricking the router

Open-source router firmware can open up a whole new world of possibilities when it comes to internet connectivity. For many people, the firmware of choice is DD-WRT. All you need is a wireless router, a service that supports its functionality and you are good to go.  The Netgear Nighthawk X10 R9000 is indisputably one of […]

Correcting SELinux security contexts: how to adjust SELinux labels on your file system

Filipe Martins 2020-12-06 2 Comments

Correcting SELinux security contexts: how to adjust SELinux labels on your file system

In an administrator’s quest to get stuff done, SELinux tends to get in the way. It is being perceived as a nuisance rather than a feature and this happens mostly for only one reason: setting correct SELinux labels requires the ability to figure out the appropriate SELinux security contexts. Here is how to do it.

[Read more…]

Filed Under: SELinux, Uncategorized Tagged With: cyber security, SELinux

Set up logrotate for Postfix

Cloud Insidr 2020-12-06 Leave a Comment

Set up logrotate for Postfix

Finding errors in a postfix log file is tedious work. The job gets even more complicated if you have to dig through old postfix log files which might no longer be relevant. logrotate comes to the rescue, but only if you configure it correctly.  Here is how you can do it on Fedora.

[Read more…]

Filed Under: Uncategorized Tagged With: log, logs, SELinux

Fixing your Web Server’s Security Headers: From Hall of Shame to Hall of Fame

Cloud Insidr 2020-12-04 4 Comments

Fixing your Web Server’s Security Headers: From Hall of Shame to Hall of Fame

[Updated 2020-12-04] This post explains how to set up robust security headers in NGINX to protect your web application from malicious payloads and other forms of attacks. Choose your HTTP(S) headers wisely.

[Read more…]

Filed Under: cloud, edge and everything in between, cybersecurity and cyber warfare, encryption, NGINX, Uncategorized, web servers in the cloud Tagged With: clickjacking, CSRF, HPKP, HSTS, MITM, x509, XSS

Cannot sign in to AWS as IAM user with MFA? How to resync your MFA token generator

Cloud Insidr 2020-11-15 1 Comment

Cannot sign in to AWS as IAM user with MFA? How to resync your MFA token generator

Problems signing in to AWS? When the login page “Sign in as IAM user” repeatedly says: “Your authentication information is incorrect. Please try again” though you entered correct information, your Gemalto token generator for MFA authentication could be out of sync.

Sign in as IAM user: Your authentication information is incorrect
Sign in as IAM user: Your authentication information is incorrect

[Read more…]

Filed Under: AWS, cybersecurity and cyber warfare Tagged With: AWS, Gemalto, IAM, MFA

Running Microsoft Azure In Your Own Data Center

Cloud Insidr 2020-09-29 Leave a Comment

Running Microsoft Azure In Your Own Data Center

In the stormy race of the digital transformation, the hybrid landscape of corporate IT is increasingly evading manageability. Could the control plane of a hyperscaler provide a lasting remedy? Would you need special hardware?

[Read more…]

Filed Under: Uncategorized Tagged With: Azure, Azure Active Directory, Azure Arc, Azure Lighthouse, Azure Resource Manager

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