Its a Server Port Access error. Here is the definative list:
#define LOG_GENERIC_MSG 0
#define LOG_GENERIC_ERR 1
#define LOG_USER_NOT_FOUND 10
#define LOG_USER_BAD_PASSWORD 11
#define LOG_USER_EXPIRED 12
#define LOG_USER_OVERDUE 13
#define LOG_USER_LOGIN_LIMIT 14
#define LOG_USER_TIME_LIMIT 15
#define LOG_PORT_NOT_ALLOWED 16
#define LOG_CHECK_ATTRIB 18
#define LOG_USER_NO_ATTRIBS 19
#define LOG_BAD_REQUEST 50
#define LOG_NO_USERNAME 51
#define LOG_NO_PASSWORD 52
#define LOG_BAD_DIGEST 53
#define LOG_PARSE_ERROR 60
#define LOG_CHAP_NOT_ALLOWED 100
-- Dale E. Reed Jr. (daler@iea-software.com)_________________________________________________________________ IEA Software, Inc. | RadiusNT, Emerald, and NT FAQs Internet Solutions for Today | http://www.iea-software.com