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Hardware needed to do VPN on demand for Iphone IOS 4.1

I would like suggestions on hardware needed to deploy Iphone ios 4 using VPN on Demand (as far as I understood CISCO Vpn) to Windows SBS 2008 network.

There will be, in worst case scenario, 20 consecutive users with Iphone's connected externaly to the network, but they will be very sensitive to overall link quallity, because they will do VOIP through it, and Exchange connections.

Only to begin with I saw the Cisco ASA 5505 Base or Security Plus.

My main goal is to do a stable and full featured VPN on Demand for Iphone users, with no administration at all, with the lowest cost possible.

PS.: We have a Draytek MultiWan V3300 router between our internal network and the internet, so they will have play nicely!
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munirb14
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munirb14
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ArneLoviusCommented:
Cisco ASA will do this, the model will depend on how many concurremt VPN sesions you need and the VPN bandwidth required.

You could either run it it parralel with your Draytek, or replace the Draytek with the ASA

There will be administration is setting up the ASA, but if you have Active Directory running in your network, you can use RADIUS to authenticate, and this could be managed as group membership, reducing day to day administration to a minimum.
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munirb14Author Commented:
Is there a chance to integrate an ASA router to active directory, or any other router ?
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ArneLoviusCommented:
As ASA Firewall cannot "join" an AD domain, however it can use RADIUS on Windows, either IAS on Windows 2003, or NPS on Windows 2008, for authentication, and it is capable of LDAP authentication.

IAS and NPS are both included with the respective versions of Windows Server
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munirb14Author Commented:
Do you think that using a VPN/IPSec passthrough router, like the peplink, would work out? My idea is doing IPSec authentication directly on server, in this case, I could use my actual router.

Thanks!
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ArneLoviusCommented:
If you want the VPN to work with iPhone, then I'd suggest sticking with Cisco VPN termination...

All of the "load balancers" likethe draytek/peplink etc are really only good for outbound traffic, where your internal clients don't "mind" which link their web browsing session our outbound SMTP goes over, inbound is completely different, each of your inexpensive links has a different IP address, the external VPN client (iPhone) cannot load balance across them.

To do multiple links for inbound, you would need to be load balancing or bonding on the ISP end of your connections (some ISP's offer this service), or using BGP to run your own AS with multiple ISP connections (not usually feasible on inexpensive conections)

You could do a manual load balance of splitting your users into groups that are configured to only use a specific endpoint, and those endpoints could all terminate on a single device, but you might be better off working out what your traffic load will be, and dedicating an ISP connection of sufficient bandwidth to it, this would also prevent your outbound traffic from affecting their traffic.
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munirb14Author Commented:
Thanks a lot, sometimes it is easier to do the right thing from the beginning!
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