Chapter 15 Unified Threat Management for FortiOS 5.0 : Custom Application & IPS Signatures : Custom signature keywords : Content keywords : distance
  
distance
Syntax: --distance <dist_int>;
Description:
Use the distance keyword to search for the contents within the specified number of bytes relative to the end of the previously matched contents. If the within keyword is not specified, continue looking for a match until the end of the payload.
The distance must be between 0 and 65535.