'fwaccel synatk -t <Threshold>' and 'fwaccel6 synatk -t <Threshold>'

Description

Configures the threshold numbers of half-opened TCP connections that trigger the Accelerated SYN Defender.

Notes:

• This command:
  1. Modifies the default configuration file $FWDIR/conf/synatk.conf, or the configuration file specified with the -c parameter.
  2. Loads the modified file.
• Threshold values are independent for IPv4 and IPv6.

Syntax for IPv4

fwaccel synatk -t <Threshold>

Syntax for IPv6

fwaccel6 synatk -t <Threshold>

Thresholds

• Global high attack threshold number is configured to the specified value <Threshold>.

  This is the number of half-open TCP connections on all interfaces required for the Accelerated SYN Defender to engage.

  • Valid values: 100 and greater
  • Default: 10000
• High attack threshold number is configured to 1/2 of the specified value <Threshold>.

  This is the high number of half-open TCP connections on an interface required for the Accelerated SYN Defender to engage.

  • Valid values: (Low attack threshold) < (High attack threshold) <= (Global high attack threshold)
  • Default: 5000
• Low attack threshold number is configured to 1/10 of the specified value <Threshold>.

  This is the low number of half-open TCP connections on an interface required for the Accelerated SYN Defender to engage.

  • Valid values: 10 and greater
  • Default: 1000