User manual

50
If you want to ban all of the protocol from
the IP (e.g.: 200.1.1.1) to access the all
PCs (e.g.: 192.168.0.2 ~ 192.168.0.50) in
the LAN, key in the parameter as;
Protocol: ANY
Direction:
INBOUND (INBOUND is from WAN to
LAN, and OUTBOUND is LAN to WAN.)
Description: Hacker
Src. IP Address: 200.1.1.1
Dest. IP Address:
192.168.0.2-192.168.0.50
Press OK to finish.
The screen will prompt the configured
parameters. Check the parameters.
Click Restart to restart the gateway or
Continue to configure another
parameters.
Filtering Rule for SMTP connection
Filtering rule will be configured as follow
Index Protocol Direction Action Source Destination Dest. Port Schedule
1 TCP Inbound Permit External Internal 25 Always
2 TCP Outbound Permit Internal External >1023 Always
3 TCP Outbound Permit Internal External 25 Always
4 TCP Inbound Permit External Internal >1023 Always
5 Any Either Deny Any Any Any Always
Packet Direction Source Destination Protocol Dest. Port Action (Rule)
1 Inbound 192.168.3.4 172.16.1.1 TCP 25 Permit (A)
2 Outbound 172.16.1.1 192.168.3.4 TCP 1234 Permit (B)
Internet
1
2
SMTP Server
SMTP Client
172.16.1.1:25 192.168.3.4:1234
Firewall
Packet Direction Source Destination Protocol Dest. Port Action (Rule)
3 Outbound 172.16.1.1 192.168.3.4 TCP 25 Permit (C)
4 Inbound 192.168.3.4 172.16.1.1 TCP 1357 Permit (D)