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How to Lock GPG/SSH Agents when Screen Locks or After a Timeout

When we aren’t using GPG/SSH, it’s best to lock it. We can set this to happen after a set time, and/or when the screensaver activates. This helps to keep our credentials secure.

June 28, 2021 · 3 min · Matt Bagley · Updated Jul 17, 2023
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Make an Easier SSH Multifactor Login

Tired of Multifactor Authentication codes for SSH, even though you just logged in? Here’s how SSH can reuse an existing connection, so you can quickly run single commands, open multiple SSH logins, and still have the same level of security.

June 6, 2019 · 3 min · Matt Bagley · Updated May 6, 2023
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Multifactor Authentication for SSH Logins

How to setup MFA/2FA/Two Factor Authentication to enhance the security of your SSH logins.

May 6, 2019 · 9 min · Matt Bagley · Updated Jul 11, 2023
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The Meltdown and Spectre Vulnerabilities

Most every cpu made since 1995 is vulnerable to a set of vulnerabilities that could compromise secret data on computers, servers, and containers.

January 4, 2018 · 3 min · Matt Bagley
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Listing users via the CVE-2016-6210 vulnerability

OpenSSH 7.2p2 and before had a vulnerability where it would use Blowfish for users that don’t exist, and SHA256/SHA512 for real users. Here’s how to test for it. (Note that i)

July 28, 2017 · 2 min · Matt Bagley
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Exclude False Positives from chkrootkit

Here’s how to exclude items from chkrootkit’s output, be it due to changing PIDs or network interfaces that change.

October 17, 2015 · 6 min · Matt Bagley · Updated Jun 6, 2023
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Checking for Rootkits with chkrootkit

Simple way to check for rootkits using chkrootkit

September 17, 2015 · 2 min · Matt Bagley · Updated May 6, 2023
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Checking for Rootkits with rkhunter

Simple way to check for rootkits

September 16, 2015 · 2 min · Matt Bagley · Updated May 5, 2023
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How to Deny Access to Dokuwiki Login Page via a Cookie

Do you ever have bots or hackers try to log into your dokuwiki login page? Here’s a way to block them with a simple cookie.

April 2, 2015 · 7 min · Matt Bagley
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Software Integrity Matters

Software is a great thing, giving us the able to do some wonderful things. But what about Trust and Integrity?

May 8, 2014 · 2 min · Matt Bagley