Cerio OW-200N2 User Manual page 150

5.9.6 Listen : Click Yes radial button to match TCP packets only with the SYN flag.
5.9.7 Active : Deny to drop and Pass to allow per filter rules
5.9.8 Interface : The interface that a filter rule applies
Notice: All packets are allowed by default. Deny rules could be added to the filter
list to filter out unwanted packets and leave remaining allowed.
Click "Save" button to add IP filter rule. Total of 20 rules maximum allowed in the IP Filter
List. All rules can be edited or removed from the List. Click Reboot button to activate your
changes.
When you create rules in the IP Filter List, the prior rules maintain higher priority. To allow
limited access from a subnet to a destination network manager needs to create allow
rules first and followed by deny rules. So, if you just want one IP address to access the
system via telnet from your subnet, not others, the Example 1 demonstrates it, not rules in
the Example 2.
5.9.9 Example 1 : Create a higher priority rule to allow IP address 192.168.2.2 Telnet
access from LAN port first, and deny Telnet access from remaining IP addresses in
the same subnet.
Source
Rule
IP / Mask
1 192.168.2.2/32
2 192.168.2.0/24
5.9.10 Example 2 : All Telnet access to the system from the IP addresses of subnet
192.168.2.x works with the rule 1 of Example 2. The rule 2 won't make any difference.
Source
Rule
IP / Mask
1 192.168.2.0/24
2 192.168.2.2/32
Destination
Port IP / Mask
192.168.2.254/32
192.168.2.254/32
Destination
Port IP / Mask
192.168.2.254/32
192.168.2.254/32
500mW eXtreme Power 11Na Outdoor Bridge
In /
Protocol Listen Action Side
Port Out
22 In TCP
22 In TCP
In /
Protocol Listen Action Side
Out
Port
22 In TCP
22 In TCP
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User's Manual
n Pass LAN
n Deny LAN
n Deny LAN
n Pass LAN