Configuring Split-Tunneling Attributes - Cisco FirePOWER ASA 5500 series Configuration Manual

Chapter 30 Configuring Tunnel Groups, Group Policies, and Users
hostname(config-group-policy)# ipsec-udp-port port
The following example shows how to set an IPSec UDP port to port 4025 for the group policy named
FirstGroup:
hostname(config)# group-policy FirstGroup attributes
hostname(config-group-policy)# ipsec-udp-port 4025

Configuring Split-Tunneling Attributes

Split tunneling lets a remote-access IPSec client conditionally direct packets over an IPSec tunnel in
encrypted form or to a network interface in clear text form. With split tunneling enabled, packets not
bound for destinations on the other side of the IPSec tunnel do not have to be encrypted, sent across the
tunnel, decrypted, and then routed to a final destination. This command applies this split tunneling policy
to a specific network.
Setting the Split-Tunneling Policy
Set the rules for tunneling traffic by specifying the split-tunneling policy:
hostname(config-group-policy)# split-tunnel-policy {tunnelall | tunnelspecified |
excludespecified}
hostname(config-group-policy)# no split-tunnel-policy
The default is to tunnel all traffic. To set a split tunneling policy, enter the split-tunnel-policy command
in group-policy configuration mode. To remove the split-tunnel-policy attribute from the running
configuration, enter the no form of this command. This enables inheritance of a value for split tunneling
from another group policy.
The excludespecified keyword defines a list of networks to which traffic goes in the clear. This feature
is useful for remote users who want to access devices on their local network, such as printers, while they
are connected to the corporate network through a tunnel. This option applies only to the Cisco VPN
client.
The tunnelall keyword specifies that no traffic goes in the clear or to any other destination than the
security appliance. This, in effect, disables split tunneling. Remote users reach Internet networks
through the corporate network and do not have access to local networks. This is the default option.
The tunnelspecified keyword tunnels all traffic from or to the specified networks. This option enables
split tunneling. It lets you create a network list of addresses to tunnel. Data to all other addresses travels
in the clear and is routed by the remote user's Internet service provider.
Split tunneling is primarily a traffic management feature, not a security feature. For optimum security,
Note
we recommend that you do not enable split tunneling.
The following example shows how to set a split tunneling policy of tunneling only specified networks
for the group policy named FirstGroup:
hostname(config)# group-policy FirstGroup attributes
hostname(config-group-policy)# split-tunnel-policy tunnelspecified
Creating a Network List for Split-Tunneling
Create a network list for split tunneling using the split-tunnel-network-list command in group-policy
configuration mode.
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Cisco Security Appliance Command Line Configuration Guide
Group Policies
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