Add SPF records
This section defines HOWTO configure a Sender Policy Framework (SPF) record for a domain and its mail servers. Briefly the design intent of the SPF …
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How can I secure / increase the security of SSH?
There are a few adjustments that can and should be made to the default SSHD configuration to increase security. Traditionally, this has been especially true …
How Can I Change the Port SSH Listens On?
To change which port ssh listens on, you just need to edit the sshd_config file. The default directory for ssh configuration is /etc/ssh. First, backup …
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