FCL parameter       ==  FCL=filterCommand
FTOCL parameter     ==  FTOCL=filterCommand
FFROMCL parameter   ==  FFROMCL=filterCommand
FSV parameter       ==  FSV=filterCommand
FTOSV parameter     ==  FTOSV=filterCommand
FFROMSV parameter   ==  FFROMSV=filterCommand
FMD parameter       ==  FMD=filterCommand
FTOMD parameter     ==  FTOMD=filterCommand
FFROMMD parameter   ==  FFROMMD=filterCommand
filterCommand       ==  [-s,][-p,][-w,]command
                    --  default: none

Specify a filter command to be applied to data transmitted between DeleGate and clients, or between DeleGate and servers. When a filterCommand is specified in relative path name, it is searched in LIBPATH.

Filters can be applied conditionally using CMAP based on circuit level information, or using CFI script based on application level information.

FILTER CONTROL OPTIONS: options to get status information from, or control synchronization with filter program.

-s -- get status information (ex. authentication) from filter
-w -- wait the filter process to exit before starting relay
-p -- detach the filter when it exits then continue relaying


BUILT-IN FILTERS: if a filterCommand is prefixed with "-", then it is a filter built-in to DeleGate.

credhyFilter == -credhy ... encryption/decryption filter

teeFilter == -tee[teeOpt]*[SPACE filePath] ... filter like tee(1) command

catFilter == -cat[teeOpt] ... filter like cat(1) command

teeOpt == -h | -n | -t | -v | -l | -e

-h -- output header part only
-n -- number the output lines
-t -- time stamp for each output line
-v -- visualize invisible characters
-l -- (with -tee) output to LOGFILE instead of stderr (default)
-e -- (with -tee) output to stderr


codeconvFilter == -charCode ... char code conversion as CHARCODE

charCode == jis | sjis | euc | utf8

Example:
FTOCL=-tee-h-n FTOSV=-tee