Reference Manual for the ProSafe VPN Firewall FVS318v3

6-8 Advanced Virtual Private Networking

January 2005
Traffic Selector These settings determine if and when a VPN tunnel will be established. If
network traffic meets all criteria, then a VPN tunnel will be created.
Local IP The drop-down menu allows you to configure the source IP address of the
outbound network traffic for which this VPN policy will provide security.
Usually, this address is from your network address space. The choices are:
• ANY for all valid IP addresses in the Internet address space
• Single IP Address
• Range of IP Addresses
• Subnet Address
Remote IP The drop-down menu allows you to configure the destination IP address of
the outbound network traffic for which this VPN policy will provide security.
Usually, this address is from the remote site's corporate network address
space. The choices are:
• ANY for all valid IP addresses in the Internet address space
• Single IP Address
• Range of IP Addresses
• Subnet Address
Authenticating Header (AH)
Configuration AH specifies the authentication protocol for the VPN header. These
settings must match the remote VPN endpoint.
Enable Authentication Use this check box to enable or disable AH for this VPN polic y.
Authentication Algorithm If you enable AH, then select the authentication algorithm:
• MD5 — the default
• SHA1 — more secure
Encapsulated Security
Payload (ESP) Configuration ESP provides security for the payload (data) sent through the VPN tunnel.
Generally, you will want to enable both Encryption and Authentication. T wo
ESP modes are available:
• Plain ESP encryption
• ESP encryption with authentication
These settings must match the remote VPN endpoint.
Enable Encryption Use this check box to enable or disable ESP Encryption.
Encryption Algorithm If you enable ESP encryption, then select the encryption algorithm:
• DES — the defau l t
• 3DES — more secure
Enable Authentication Use this check box to enable or disable ESP transform for this VPN policy.
You can select the ESP mode also with this menu.
Two ESP modes are available:
• Plain ESP
• ESP with authentication

Table 6-1. VPN – Auto Policy Configuration Fields

Field Description