4 - Configuring the SAGEM F@st™ 1500 ADSL router

When particular types of traffic are checked, only the particular type of traffic initiated from the internal LAN will be allowed. For example, if the user only checks “FTP Service” in the Stateful Packet Inspection section, all incoming traffic will be blocked except for FTP connections initiated from the local LAN.

Stateful Packet Inspection allows you to select different application types that are using dynamic port numbers. If you wish to use the Stateful Packet Inspection (SPI) to block packets, click on the Yes radio button in the “Enable SPI and Anti-DoS firewall protection” field and then check the inspection type that you need, such as Packet Fragmentation, TCP Connection, UDP Session, FTP Service, H.323 Service, or TFTP Service.

3) When hackers attempt to enter your network, we can alert you by e-mail

Enter your email address.

Specify your SMTP and POP3 servers, user name, and password.

4) Connection Policy

Enter the appropriate values for TCP/UDP sessions as described in the following table.

Parameter

Defaults

Description

 

 

 

Fragmentation

10 sec

Configures the number of seconds that a packet state structure

half-open wait

 

remains active. When the timeout value expires, the router drops

 

 

the unassembled packet, freeing that structure for use by another

 

 

packet.

 

 

 

TCP SYN wait

30 sec

Defines how long the software will wait for a TCP session to

 

 

synchronize before dropping the session.

TCP FIN wait

5 sec

Specifies how long a TCP session will be maintained after the

 

 

firewall detects a FIN packet.

TCP connection

3600 seconds

The length of time for which a TCP session will be managed if there

idle timeout

(1 hour)

is no activity.

UDP session

30 sec

The length of time for which a UDP session will be managed if

idle timeout

 

there is no activity.

H.323 data

180 sec

The length of time for which an H.323 session will be managed if

channel idle

 

there is no activity.

timeout

 

 

SAGEM F@st™ 1500 Reference Manual - 288053220-04 Reproduction and communication prohibited without the written permission of E Page 4-45

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Sagem 1500WG manual Connection Policy