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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 the Session Thresholds for IP Address-Level Traffic Statistics and Monitoring

Setting the Session Thresholds for IP Address-Level Traffic Statistics and Monitoring

Context

The IP address-level traffic statistics and monitoring counts and monitors the TCP and UDP sessions set up on an IP address in a zone. The Router determines whether to restrict the connections in a certain direction by checking whether the number of the TCP or UDP connection requests sent from a source IP address (or received by a destination address) exceeds the threshold. This function prevents DoS caused by the malicious attack or busy systems.

When the number of TCP and UDP sessions falls below the threshold, the source IP address can initiate sessions and the destination address can receive sessions.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    firewall zone zone-name

    The zone view is displayed.

  3. Run:

    statistics ip enable { inzone | outzone } 

    The IP address-level traffic statistics and monitoring are enabled.

    By default, the IP address-level traffic statistics and monitoring is disabled.

  4. (Optional) Run:

    statistics connect-number ip [ range beginip endip ] { inzone | outzone } { icmp | tcp | udp } high high-threshold low low-threshold

    The session thresholds for the IP address-level traffic statistics and monitoring are set.

    You can set the thresholds for TCP and UDP sessions in the inbound and outbound directions. For example, you can set the threshold for inbound TCP sessions to 10000. When the number of TCP sessions initiated from an IP address in the local zone exceeds 10000, the Router denies new TCP sessions from this IP address.

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Updated: 2019-05-25

Document ID: EDOC1000097287

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