Friday, January 2, 2015

Secure your cPanel account from spamming

General Guidelines:
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(). Use strong passwords (compromised accounts tend to send a lot of spam!)

(). Check the server for malware. cPanel provides ClamAV in WHM >> Configure ClamAV Scanner. More information about this program can be found in our documentation:

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https://documentation.cpanel.net/display/CKB/Security+and+Virus+Scans+in+WHM
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(). Update web applications to their most recent versions (such as Wordpress, Joomla, etc.)

You can also use the following settings in WHM >> Tweak Settings:
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(). Track email origin via X-Source email headers

(). Restrict outgoing SMTP to root, exim, and mailman (FKA SMTP Tweak) [?]

(). Prevent “nobody” from sending mail [?]

(). Add X-PopBeforeSMTP header for mail sent via POP-before-SMTP [?]
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In WHM >> Exim Configuration Manager >> Basic Editor (Mail), there are various options to help discover who is sending spam, including the following options to prevent authenticated users from falsifying the the From header:

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EXPERIMENTAL: Rewrite From: header to match actual sender [?]
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If you want to analyze the content of outgoing messages to better detect spam, you can use the following options in WHM >> Exim Configuration Manager (the second option lets you define a value for outgoing spam that is different from the value for incoming spam):

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(). Scan outgoing messages for spam and reject based on SpamAssassin® internal spam_score setting [?]

(). Scan outgoing messages for spam and reject based on defined SpamAssassin® score (minimum: 0.1; maximum: 99.9) [?]
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2 comments:

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