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The SMS supports DDoS for the following devices:
  • 440T/2200T (TOS 4.0 and later)
  • 1100TX/5500TX (TOS 5.2 and later)
  • 8200TX/8400TX (TOS 5.0 and later)
  • 8600TXE/9200TXE (TOS 6.0 and later)
  • 5600TXE (TOS 6.5 and later)
Go to Profiles to enable the SYN Proxy filter. The SYN Proxy Threshold setting and Advanced DDoS configuration options for these devices are configured when you edit Profile filters. See Advanced DDoS.