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CLI-based Configuration Guide - Security

AR500, AR510, and AR530 V200R007

This document describes the configurations of Security, including AAA, DAA,NAC, BRAS Access, ACL, Firewall, Deep Security Defense, Local Attack Defense;Attack Defense, Traffic Suppression, ARP Security, Port Security, DHCP Snooping, IPSG, URPF, PKI, SSL, HTTPS, Keychain, separating the management plane from the service plane, security risks.
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Setting Parameters for Scanning Attack Defense

Setting Parameters for Scanning Attack Defense

Context

For scanning attack defense, the following two parameters need to be set:

  • Maximum session rate: When an IP address accesses another IP address or port at a rate higher than this value, the firewall considers that a scanning attack occurs. Then the firewall adds the IP address or port to the blacklist to reject new sessions from the IP address or port.
  • Blacklist timeout: After an IP address or port stays in the blacklist for a specified period, the firewall deletes the IP address or port from the blacklist and allows new sessions from the IP address or port.

Step 2 and step 3 are optional and can be performed in any sequence. You can perform the steps as required.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    firewall defend ip-sweep { blacklist-expire-time interval | max-rate rate-value }

    The parameters for IP address sweeping attack defense are set.

  3. Run:

    firewall defend port-scan { blacklist-expire-time interval | max-rate rate-value }

    The parameters for port scanning attack defense are set.

    By default, the maximum session rate for IP address sweeping and port scanning attack defense is 4000 pps, and the blacklist timeout is 20 minutes.

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Updated: 2019-05-25

Document ID: EDOC1000097287

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