Tag: configuration
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Active, and refusing every query
A routine change to add a forwarding rule took DNS down for the entire lab. Every query from every machine, internal names and external ones alike, came back REFUSED from both resolvers.
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The off-by-one that answered
A planned feature of this lab lets you text a question to it and get an answer back, so that basic status is reachable when the internet is not. One of the questions is how full a machine’s disks are.
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The config was read, and ignored anyway
An earlier post covered a setting that never applied because another file set it first. sshd_config is first-match-wins, a hardening file was numbered 99-, and the value lost.
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The config file that reads top-down
A server on the public internet accepted password logins over SSH for several weeks. Two configuration files said it did not. The deployment log recorded the setting as done, verified, and confirmed to survive a reboot.