KB ID 0000066
This is a simple job to do from command line, however the world is full of people who would rather spend an hour in the ASDM working out how to do it! So I’ve included both methods.
What is split tunneling?
This is the process of letting a remote VPN user browse the web, and access local resources etc, from their location whilst connected to your VPN in this case via SSLVPN, but also from WebVPN or IPSEC VPN.
Option 1 Enable Split Tunnel via Command Line.
1. Connect to the ASA > Go to enable mode > Then to global configuration mode > Create an ACL that permits traffic from the network behind the ASA to any. (Note: Add additional ACL’s for additional internal networks).
Type help or '?' for a list of available commands. PetesASA> enable Password: ****** PetesASA# configure terminal PeteASA(config)# access-list Split-Tunnel standard permit 10.0.0.0 255.255.255.0
2. Add the split tunnel to the policy you are using for you remote VPN, (if you are unsure issue a show run group-policy).
PeteASA(config)# group-policy SSL_Policy attributes PeteASA(config-group-policy)# split-tunnel-policy tunnelspecified PeteASA(config-group-policy)# split-tunnel-network-list value Split-Tunnel PeteASA(config-group-policy)# exit PeteASA(config)#
3. Save the changes.
PeteASA(config)# write mem Building configuration... Cryptochecksum: cb28eeb2 3d203272 eda92e1c a3b70d09 3166 bytes copied in 0.890 secs [OK] PeteASA(config)#
Enable Split Tunnel on an older (PIX Firewall)
Type help or '?' for a list of available commands. PetesPIX> enable Password: ****** PetesPIX# configure terminal PetesPIX(config)# access-list Split-Tunnel permit ip 10.0.0.0 255.255.255.0 any PetesPIX(config)# vpngroup RemoteVPN split-tunnel Split-Tunnel
Option 2 Enable Split Tunnel via ASDM
2. Edit > Select Advanced > Split Tunneling.
3. Next to Policy > Untick “Inherit” > Change to “Tunnel Network List Below”.
4. Next to “Network List” remove the tick from Inherit > Click Manage.
5. Add ACL > Call it something sensible like Split-Tunnel > OK.
6. Then click Add ACE.
7. Select Permit and enter the network BEHIND THE ASA> OK.
8. Should look a bit like this > OK.
10. Apply > File > Save running configuration to flash.
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Original Article Written 14/06/12