type: txt
help: Defines the server certificate fingerprint or key-file name.
allowed: sudo ls /etc/snmp/tls/certs
syntax:expression: pattern $VAR(@) "^[0-9A-F]{2}(:[0-9A-F]{2}){19}$" ||
    exec "if [ `sudo ls \"/etc/snmp/tls/certs/$VAR(@)\" 2> /dev/null` ]; \
      then \
	 exit 0; \
      else \
        exit 1; \
      fi" ; "value can be finger print key or filename in /etc/snmp/tls/certs folder"