Netgear FVS318N 사용자 설명서

Click Apply to save your settings.

Manage the Application Level Gateway for SIP Sessions

The application level gateway (ALG) facilitates multimedia sessions such as voice over IP 
(VoIP) sessions that use the Session Initiation Protocol (SIP) across the firewall and provides 
support for multiple SIP clients. SIP support for the ALG, which is an IPv4 feature, is disabled 
by default. 

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Select Security > Firewall > Advanced. The Advanced screen displays:

Select the Enable SIP ALG check box.

Click Apply to save your settings.

User Limit

Enter a number to indicate the user limit. Note the following:

• If the User Limit Parameter is set to Percentage of Max Sessions, the number 

specifies the maximum number of sessions that are allowed from a single-source 
device as a percentage of the total session connection capacity of the wireless 
VPN firewall. (The session limit is per-device based.) 

• If the User Limit Parameter is set to Number of Sessions, the number specifies 

an absolute value.

Some protocols such as FTP and RSTP create two sessions per connection, 

which should be considered when you configure a session limit.

Total Number of 
Packets Dropped due 
to Session Limit

This is a nonconfigurable counter that displays the total number of dropped packets 
when the session limit is reached.

TCP Timeout

For each protocol, specify a time-out in seconds. A session expires if no data for 
the session is received for the duration of the time-out period. The default time-out 
periods are 1800 seconds for TCP sessions, 120 seconds for UDP sessions, and 
60 seconds for ICMP sessions.

UDP Timeout

ICMP Timeout