PLANET CS-2001 - Manual (Page 289)

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Step 15. In the Filter Properties window, select “A specific IP Address” for
Source address, and then apply B Company’s WAN IP address
“211.22.22.22” and subnet mask “255.255.255.255” to the fields. After that,
select “A specific IP Subnet” for Destination address, and then type
“192.168.10.0” as A Company‘s subnet address, and “255.255.255.0” as
subnet mask. Note: Do not tick “Mirrored. Also match packets with the
exact opposite source and destination addresses”. （Figure 11-76）
Figure 11-76 Filter Properties Settings
Step 16. Settings completed.
（Figure 11-77）