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ProSafe Gigabit 8 Port VPN Firewall FVS318G Reference Manual
Firewall Protection and Content Filtering 4-23
v1.1, August 2010
The Total Number of Packets Dropped due to Session Limit field shows total number of
packets dropped when session limit is reached.
6. In the Session Timeout section, modify the TCP, UDP and ICMP timeout values as you
require. A session will expire if no data for the session is received for the duration of the
timeout value. The default timeout values are 1200 seconds for TCP sessions, 180 seconds for
UDP sessions, and 8 seconds for ICMP sessions.
7. Click Apply to save your settings.
Managing 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. ALG support for SIP is disabled by default.
To enable ALG for SIP:
1. Select Security from the main menu and Firewall Rules from the submenu. The LAN WAN
Rules screen displays.
2. Click the Advanced tab. The Advanced screen displays.
3. Select the Enable SIP ALG checkbox.
4. Click Apply to save your settings.
Note: Some protocols (such as FTP or RSTP) create two sessions per connection
which should be considered when configuring Session Limiting.
Figure 4-15
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