# ICMP Defense Policy

The defense policies for ICMP services cover block, and rate limiting.

- Block

  Discards all ICMP packets.

- Rate Limiting

  - ICMP Rate Limiting: Limits ICMP rate destined for an IP address below Threshold.

  - ICMP New Session Limiting: Limits the number of new ICMP sessions to the destination IP address per second below the specified Threshold.

  The Threshold is specified based on actual network bandwidths.

Parent topic: Configuring the Zone-based Defense Policy (AntiDDoS)

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