The argument is optional; if omitted, /etc/sockd.fr is assumed.
The frozen route file is produced by make_sockdfr and is essentially the memory image of the parsed route file. Using the frozen route file can reduce the start-up delay of the SOCKS server program since it no longer has to parse the file contents.
When the SOCKS server starts, it always looks for the frozen route file /etc/sockd.fr first. If that file is not found, it then tries to use the plain-text route file /etc/sockd.route. If you use frozen route file, you must remember to run make_sockdfr every time after you modify the plain-text file or the SOCKS server will continue to use the frozen version of a previous route file.
Ying-Da Lee, email@example.com or firstname.lastname@example.org