Category Archives: Debian

rsyslog: Configure TLS/SSL

Hi,

to setup a remote syslog server TLS encryption is strongly recommended.

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Debian: Enable apt debug logging

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for troubleshooting purposes (i.e. certificate issues) it is sometimes to enable the debug logging of apt.
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Debian: Disable certificate crl check for apt

Hi,

there is an issue in the openssl libraries < version 3 that an crl check of an certificate fails if the file size of the crl file is greater then 100kB.

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Linux/systemd: Set default runlevel to console

Hi,

for server systems it isn’t necessary to start a graphical user interface because they usually run headless.
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Linux: Load iptables/firewall rules at startup

Hi,

when you set up firewall rules by iptables these rule are not persistent. This means they are volatile and will be deleted at reboot time.
Continue reading Linux: Load iptables/firewall rules at startup