gistfile1.txt

Current open ports (csf rules)

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TCP_IN = "1186,2202,4444,4568,9999,9200,9500,4567,44433,60016,40054,41690,587,10000,20,21,22,25,53,80,110,143,443,465,587,993,995"

# Allow outgoing TCP ports
TCP_OUT = "1186,2202,4444,4568,9999,9200,9500,4567,44433,60016,40054,41690,587,10000,20,21,22,25,53,80,110,143,443,465,587,993,995"
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We may only need following


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TCP_IN = "22,25,80,443"


TCP_OUT = "22,53,80,443"
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Also, we could change SSH portf rom 22 to non standard one like 4545