3Com SUPERSTACK 3CR16110-95, User Manual, Page: 124 / 214

124 C
HAPTER
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ONFIGURING
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IRTUAL
P
RIVATE
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ETWORK
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ERVICES
Figure 56 VPN Summary Window
Changing the Global
IPSec Settings
The Firewall’s security uses the IPSec protocol to transmit encrypted data.
The settings in the
Current IPSec Settings section affect all traffic
transmitted across the Firewall.
Unique Firewall Identifier
The Unique Firewall Identifier is used to identify the Firewall within a
network. To change the value enter a string of numbers and letters in the
Unique Firewall Identifier field and click Update . The Unique Firewall
Identifier defaults to the serial number of the Firewall.
CAUTION: The Unique Firewall Identifier must be different for each
Firewall within your network as VPN connections may refer to Firewalls by
name.
Enable VPN
To enable VPN connections check the Enable VPN checkbox and click the
Update button. If VPN is disabled the VPN settings will still be visible on
screen and can still be amended but will have no effect until VPN is
enabled.
Disable all Windows Networking (NetBIOS) Broadcasts
NetBIOS broadcasts are used when Windows PCs browse their local
network. Disabling NetBIOS broadcasts will stop Windows PCs from
being able to browse networks on other sites that are connected by the
Firewall but will have no effect on browsing the local site or making
connections between sites.
DUA1611-0AAA02.book Page 124 Thursday, August 2, 2001 4:01 PM