How to Block/Unblock ASNs in Spam AutoShield using cPFence Tools?

Manage ASN Blocks (WebUI Method)

 

  1. Open Tools & Utilities ➜ Spam AutoShield Tools.
  2. Click Block / Unblock ASN.
  3. Enter the autonomous system number (e.g. AS204915).
  4. Choose Block ASN to reject all senders from that network or Unblock ASN to remove the restriction.

ASN blocks are perfect for large botnets or abusive providers that rotate IPs constantly.

Command Line (CLI) Method

  1. SSH into the server.
  2. Block: 
    cpfence --add-spam-autoshield-asn AS204915
  3. Unblock: 
    cpfence --del-spam-autoshield-asn AS204915

 

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