public int getRadiusAcctPort() throws GuacamoleException {
        return environment.getProperty(
            RadiusGuacamoleProperties.RADIUS_ACCT_PORT,
            1813
        );
    }
Returns the UDP port that will be used to communicate accounting
information to the RADIUS server, as configured in
guacamole.properties.  The default is 1813.

@return
    The accouting port of the RADIUS server, as configured with
    guacamole.properties.

@throws GuacamoleException
    If guacamole.properties cannot be parsed.
extensions/guacamole-auth-radius/src/main/java/org/apache/guacamole/auth/radius/conf/ConfigurationService.java