User Documentation

Version 1.2 / August 2020 Page 91 / 102
►Enter wild character * for source and destination MAC
addresses
►Select protocol IPv4 to be checked inside of the passing
Ethernet frames.
►Click ‘Next’.
►Define the criteria for investigating an IPv4 packet
(check for NTP communication UDP/123)
Note: Use always wild character * for source port because
it will be created dynamically by the sender (to be used for
unique re-addressing of an answer packet by a recipient).
►Click ‘Next’.
►Select auto for Connection control.
(Packet filter acts as an stateful inspection firewall and rec-
ognizes/allows automatically answers based on an initiated
request).
►Click ‘Next’.
No signal check and setting.
►Click ‘Next’.
►Select action (allow) related to the previous defined
rules. ►Add a name for this rule (here NTP_L2_Allow123).
►Click ‘Next’.
Now the necessary rule is configured.
►Click ‘Next’ to finish the configuration of this rule-set.