NetComm G.SHDSL 4-port Security Modem Routers NB712 - Manual (Page 53)

NB712 / NB714 User Guide 53
YML829 Rev1
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)
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)
Packet Direction Source Destination Protocol Dest. Port Action (Rule)
5 Inbound 10.1.2.3 171.16.3.4 TCP 6000 Deny (E)
6 Outbound 171.16.3.4 10.1.2.3 TCP 5150 Deny (E)