How can I install a certificate on the android device I have an entrust cert on 
server but it can't validate going to create an openssl cert and install.

-----Original Message-----
From: Martin Willi [mailto:[email protected]]
Sent: Tuesday, July 01, 2014 9:11 AM
To: Mcginniss, David S [NTK]
Cc: [email protected]; [email protected]
Subject: Re: [strongSwan] Android VPN

David,

> IKEv2 using PSK and MSCHAPv2 example
>
> SEgw.xxx.yyy.net FQDN
> SEGWID  [email protected]<mailto:[email protected]>
> SEGW PSK a1b2c3
>
> EAP- MSCHAPv2
> AAA User [email protected]<mailto:[email protected]>
> AAA Password d3e4f5g6

EAP authentication in conjunction with PSK server authentication can be very 
problematic, and is therefore not allowed by RFC 5996, and not supported by our 
Android client.

If I understand correctly, you'd like to authenticate a large set of users to a 
security gateway. Each user authenticates itself using the mentioned AAA 
credentials. The gateway, on the other hand, uses a single
(?) PSK to authenticate itself against all users.

The problem is that each client has to know the security gateway PSK to verify 
it. Having that PSK, it can easily impersonate the gateway against all other 
users, and collect all the AAA credentials of all users. Something you really 
should avoid, especially with larger/open user groups.

It is therefore recommended to use public key authentication together with EAP. 
There also is the mutual EAP-only authentication extension [1], which is 
supported in strongSwan. However, EAP-MSCHAPv2 can not be considered secure, so 
you can't use it with that extension.

Regards
Martin

[1]http://tools.ietf.org/html/rfc5998


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