Networking

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Networking notes — switches, routers, DNS, TLS and the things that only break once a year.

Cisco

SYS-4-CONFIG_RESOLVE_FAILURE
What the log message means and how to stop it.
no ip domain-lookup

Certificates

Self-Signed CA
Run your own CA with mkcert and get every box on the LAN to trust it.
mkcert -install
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