ATL Telecom AM2 - Manual (Page 52)

ATL User Guide
AM2 G.SHDSL Modem 52
6.5.7.4FILTERING RULE FOR SMTP CONNECTION
Filtering rules are configured as follows:
Internet
Packet Source Action (Rule) Direction Protocol Dest. Port Destination
25 192.168.3.4 172.16.1.1 Permit (C) Outbound TCP 3
1357 172.16.1.1 192.168.3.4 Permit (D) Inbound TCP 4
SMTP Client
SMTP Server
3
4
Firewall
172.16.1.1:1357
192.168.3.4:25
Internet
Packet Source Action (Rule) Direction Protocol Dest. Port Destination
25 172.16.1.1 192.168.3.4 Permit (A) Inbound TCP 1
1234 192.168.3.4 172.16.1.1 Permit (B) Outbound TCP 2
SMTP Server
SMTP Client
1
2
Firewall
172.16.1.1:25
192.168.3.4:1234
Index Source Action Direction Protocol Schedule Dest. Port Destination
25 Internal External Permit Inbound TCP 1 Always
>1023 External Internal Permit Outbound TCP 2 Always
25 External Internal Permit Outbound TCP 3 Always
>1023 Internal External Permit Inbound TCP 4 Always
25 Any Any Deny Either Any 5 Always