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CLI-based Configuration Guide - Security

AR500, AR510, AR531, AR550, AR1500, and AR2500 V200R010

This document provides the basic concepts, configuration procedures, and configuration examples in different application scenarios of the network management feature supported by the device.
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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.

    The thresholds for ICMP, TCP, and UDP sessions can be set in the inbound and outbound directions respectively. For example, when the upper threshold for the number of TCP sessions in the inbound direction is 10,000 and the lower threshold is 8,000, and the number of TCP sessions initiated by the local area to other areas exceeds 10,000, the device rejects the new TCP session request initiated from the local area. When the total number of TCP sessions initiated by the local area to other areas decreases to 8,000, the local area can initiate new TCP session requests to other areas.

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Updated: 2019-05-20

Document ID: EDOC1100034236

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