IP Phone SSL VPN and Split tunneling

Hi Team,
I went throught the following document which is very useful:
https://supportforums.cisco.com/docs/DOC-9124
The only things i'm not sure about split-tunneling point:
Group-policy must not be configured with split tunnel or split exclude. Only tunnel all is the supported tunneling policy
I could see many implementation when they used split-tunneling, like one of my customer:
group-policy GroupPolicy1 internal
group-policy GroupPolicy1 attributes
banner value This system is only for Authorized users.
dns-server value 10.64.10.13 10.64.10.14
vpn-tunnel-protocol ssl-client
split-tunnel-policy tunnelspecified
split-tunnel-network-list value split-tunnel
default-domain value prod.mobily.lan
address-pools value SSLClientPool
webvpn
anyconnect keep-installer installed
anyconnect ssl rekey time 30
anyconnect ssl rekey method ssl
anyconnect ask none default anyconnect
username manager-max password XTEsn4mfYvPwC5af encrypted privilege 15
username manager-max attributes
vpn-group-policy GroupPolicy1
tunnel-group PhoneVPN type remote-access
tunnel-group PhoneVPN general-attributes
address-pool SSLClientPool
authentication-server-group AD
default-group-policy GroupPolicy1
tunnel-group PhoneVPN webvpn-attributes
group-url https://84.23.107.10 enable
ip local pool SSLClientPool 10.200.18.1-10.200.18.254 mask 255.255.254.0
access-list split-tunnel remark split-tunnel network list
access-list split-tunnel standard permit 10.0.0.0 255.0.0.0
It is working for them w/o any issue.
My question would be
- is the limitation about split-tunneling still valid? If yes, why it is not recommended?
Thanks!
Eva

Hi,
If you're not using certificates in client authentication then the SSL handshake will complete before the user is requested to authenticate with username/password. If this authentication request fails you will see the SSL session terminated immediately following this failure (as in the logs you provided). Notice the 5 seconds between the SSL session establishment and termination, this is most likely when the user is being authenticated against the aaa server. If the phone is failing authentication against an external aaa-server you'll want to investigate the logs on that server to determine the root cause of the failure. The ASA can also provide confirmation of the authentication request/reject with the command 'show aaa-server'. If you want to see what's going on at an authentication protocol level you can enable several debugs including "debug aaa authentication|common|internal' and protocol specific debugs such as 'debug radius user|session|all' or 'debug ldap'.
Did this answer your question? If so, please mark it Answered!

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As far as packet tracer is concerned for the VPN client if you use the outside interface as source it will never work the reason is the connection between the ASA and the client is of real IP address (Public) and the traffic that you are testing with is a VPN encrypted traffic your ASA's outside interface doesn't know what is 172.16.1.1, he will check it against the outside access-list and will drop it.
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http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a0080975e83.shtml
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http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a00808c9a87.shtml
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Did this answer your question? If so, please mark it Answered!

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Message Edited by Chris_F on 01-11-2010 07:41 AM
Chris F.
CCENT, CCNA, CCNA Sec

Of course, you do as you are told. But I hope you keep written record of what you have been told and have it signed of whoever told you to set it up. It's essential that you stay on the safe side in these matters.
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Hi,
When you are using Full Tunnel VPN (which is the default setting) you will have a couple of things that you need to configure on the ASA.
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Let me know how it goes.
- Jouni

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https://supportforums.cisco.com/docs/DOC-9124

The embargo/NDA is being lifted. The ASA is not involved. Here's the jump page with info:
http://www.cisco.com/en/US/netsol/ns1246/index.html
PS- Jason could have found out details in advance since DiData has partner NDA status.
Please remember to rate helpful responses and identify helpful or correct answers.

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