icmp_ratemask

Mask made of ICMP types for which rates are being limited.
Significant bits: IHGFEDCBA9876543210
Default mask: 0000001100000011000 (6168)

Bit definitions (see include/linux/icmp.h):

  • 0 Echo Reply
  • 3 Destination Unreachable *
  • 4 Source Quench *
  • 5 Redirect
  • 8 Echo Request
  • B Time Exceeded *
  • C Parameter Problem *
  • D Timestamp Request
  • E Timestamp Reply
  • F Info Request
  • G Info Reply
  • H Address Mask Request
  • I Address Mask Reply

* - rate limited by default (see default mask above)