Luke Hebert
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Welcome to the articles section, where business, technology, and everyday problem-solving meet. You’ll find practical how-tos, troubleshooting notes from the trenches, and the occasional take on whatever’s happening in the world. Some posts will save you time, some will spark ideas, and a few will just be me thinking out loud. Grab a coffee and dig in.

Kerberos Code 41: Someone’s Tweaking the Stream! February 18, 2022

Kerberos Code 41: Someone’s Tweaking the Stream!

JDK 1.8.0u242 and later introduced Kerberos referral handling per RFC 6806, which can break Active Directory name canonicalization and produce a KRB_AP_ERR_MODIFIED error. This post walks through the two configuration fixes that resolve the issue.
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A Practical Guide to Traceroute (tracecrt) January 24, 2022

A Practical Guide to Traceroute (tracecrt)

Traceroute is one of the most misunderstood tools in a network engineer’s toolkit. This guide walks through how traceroute actually works, how to read the output correctly, and how to avoid the common pitfalls that lead to wrong conclusions.
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Add Hard and Soft Limits for Apache Stack January 24, 2022

Add Hard and Soft Limits for Apache Stack

Configure the soft and hard stack limits for the Apache user in /etc/security/limits.conf to prevent segmentation faults caused by insufficient stack space.
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Additional Kernel Tweaks for IPv4 Broadband January 24, 2022

Additional Kernel Tweaks for IPv4 Broadband

A practical guide to tuning Linux TCP/IP kernel parameters for high-speed, high-latency broadband connections, covering buffer sizing, timeout adjustments, SYN flood protection, and congestion control selection.
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Apache Broke on Boot (Because of Course It Did) January 24, 2022

Apache Broke on Boot (Because of Course It Did)

A quick fix for the SSL Library Error 185090057 that appears when restarting Apache, caused by a malformed PEM certificate file. Learn how to validate and correct the certificate format to get your server back online.
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Apache Tuner January 24, 2022

Apache Tuner

Apache Tuner is a Perl script that analyzes your Apache configuration and system resources to surface quick performance wins. Run it, read the suggestions, and tune your MPM, KeepAlive, and worker settings with confidence.
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