TMS zl Management and Configuration Guide ST.1.1.100226

7-296
Virtual Private Networks
GRE Examples
f. For Source, specify the remote IP addresses that are allowed to send
traffic on the tunnel.
g. For Destination, specify the appropriate multicast address.
If you specified a particular service, you can also leave Any Address if
you choose.
h. Click Apply.
3. If you enabled a dynamic routing protocol (RIP or OSPF) on the tunnel,
ensure that access policies permit this traffic between SELF and the
tunnel zone. (This is the default setting.)
4. Click Close.
5. Click Save.
GRE Examples
This section contains examples of GRE implementations with step-by-step
configuration instructions. The examples provided are:
■ Enabling OSPF on a GRE tunnel
See “Enabling OSFP on a GRE tunnel” on page 7-296.
■ Configuring redundant GRE tunnels
See “Redundant GRE Tunnels” on page 7-328.
Enabling OSFP on a GRE tunnel
This section provides step-by-step instructions for configuring a GRE tunnel
between two Threat Management Services (TMS) zl Modules.
This VPN connects two networks, each behind a TMS zl Module. Each site has
two zones configured.
With this VPN, users in VLAN 40 of site B will be able to connect with VLAN
70 of site A. Although there are other VLANs in Zone2 and Zone6, only traffic
between VLAN 40 and VLAN 70 will be allowed through this tunnel.