Campbell Scientific CR6 CR6 Measurement and Control System - Page 460
Pass-Code Lockout
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Section 8. Operation • Telnet o Watch IP traffic in detail. IP traffic can reveal potentially sensitive information such as FTP login usernames and passwords, and server connection details including IP addresses and port numbers. o Watch serial traffic with other dataloggers and devices. A Modbus capable power meter is an example. o View data in the Public and Status tables. o View the datalogger program, which may contain sensitive intellectual property, security codes, usernames, passwords, connection information, and detailed or revealing code comments. • FTP o Send and change datalogger programs. o Send data that have been written to a file. • HTTP o Send datalogger programs. o View table data. o Get historical records or other files present on the datalogger drive spaces. o More access is given when a .csipasswd is in place, so ensure that users with administrative rights have strong log-in credentials. 8.11.2 Pass-Code Lockout Pass-code lockouts (historically known in Campbell Scientific dataloggers simply as "security codes") are the oldest method of securing a datalogger. Pass-code lockouts can effectively lock out innocent tinkering and discourage wannabe hackers on non-IP based telecommunication links. However, any serious hacker with physical access to the datalogger or to the telecommunication hardware can, with only minimal trouble, overcome the five-digit pass-codes. Systems adequately secured with pass-code lockouts are probably limited to, • private, non-IP radio networks • direct links (hardwire RS-232, short-haul, multidrop, fiber optic) • non-IP satellite • land-line, non-IP based telephone, where the telephone number is not published • cellular phone wherein IP has been disabled, providing a strictly serial connection Up to three levels of lockout can be set. Valid pass codes are 1 through 65535 (0 confers no security). Note Although a pass code can be set to a negative value, a positive code must be entered to unlock the CR6. That positive code will equal 65536 + (negative security code). For example, a security code of -1111 must be entered as 64425 to unlock the CR6. Methods of enabling pass-code lockout security include the following: • Status table - Security(1), Security(2) and Security(3) registers are writable variables in the Status table wherein the pass codes for security levels 1 460
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