HP VPN Firewall Appliances VPN Configuration Guide

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Figure 37 Adding a GRE over IPv4 tunnel interface (Tunnel0)
3. Create a GRE over IPv4 tunnel interface, with the tunnel interface number being 1:
a. Select VPN > GRE > GRE from the navigation tree.
b. Click Add.
c. Enter 1 in the Tunnel Interface field.
d. Enter IP address/mask 172.168.2.3/24.
e. Select Management from the Zone list. (Select a security zone according to your network
configuration.)
f. Enter the tunnel source IP address 11.1.1.3 and the tunnel destination IP address 11.1.1.2.
g. Click Apply.