This optional parameter specifies the name of the file where
messages log entries are written. You can use any of the special
characters defined. For more information about special characters, see
Section 3.3. Special formatters.
The default value is
%L/messagelog.
The
special characters are replaced as follows:
%0 is replaced by the protocol.
%1 is replaced by the log format value.
%2 is replaced by the encoding.
If the Filename parameter starts with a vertical bar character
(‘|’), the rest of the filename is assumed to be a program to which the
output is to be piped. Otherwise the output appends to the named
file:
# Example file name: messagelog-radius-text-hex
Filename %L/messagelog-%0-%1-%2
