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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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Default Settings for Firewalls

Default Settings for Firewalls

Table 5-1 list the default settings for firewalls.

Table 5-1  Default settings for firewalls
Parameter Default Setting
Aging time of the firewall session table

The value varies according to the protocol.

  • DNS: 120 seconds
  • FTP: 120 seconds
  • FTP-DATA: 120 seconds
  • HTTP: 120 seconds
  • ICMP: 20 seconds
  • TCP: 600 seconds
  • TCP-PROXY: 10 seconds
  • UDP: 120 seconds
  • SIP: 1800 seconds
  • SIP-MEDIA: 120 seconds
  • RTSP: 60 seconds
  • RTSP-MEDIA: 120 seconds
  • PPTP: 600 seconds
  • PPTP-DATA: 600 seconds
Default packet filtering mode Allows outbound packets and denies inbound packets.
Maximum session rate for Flood attacks 1000 pps
Maximum length of an ICMP packet 4000 bytes
Maximum session rate for IP address sweeping 4000 pps
Blacklist timeout in IP address sweeping 20 minutes
Maximum session rate for port scanning 4000 pps
Blacklist timeout in port scanning 20 minutes
Thresholds for system traffic statistics and monitoring

The default upper threshold is 16384, and the default lower threshold is 12288.

Thresholds for zone-based traffic statistics and monitoring

The default upper threshold is 16384, and the default lower threshold is 12288.

Thresholds for IP address-based traffic statistics and monitoring

The default upper threshold is 16384, and the default lower threshold is 12288.

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Updated: 2019-05-20

Document ID: EDOC1100034236

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