[strongSwan] Sudden issues with Windows 10 clients

John Connett jrc at skylon.demon.co.uk
Thu May 10 22:52:24 CEST 2018

Don't know if this might be related:


"Addresses an issue that prevents certain VPN apps from working on builds of Windows 10, version 1803. These apps were developed using an SDK version that precedes Windows 10, version 1803, and use the public RasSetEntryProperties API".

John Connett

From: Users <users-bounces at lists.strongswan.org> on behalf of Jafar Al-Gharaibeh <jafar at atcorp.com>
Sent: 10 May 2018 21:33
To: Houman
Cc: users at lists.strongswan.org
Subject: Re: [strongSwan] Sudden issues with Windows 10 clients

Hi Houman,

 Similar to the Windows problem you had earlier, you don't have the correct combination of configured algorithms. look at the logs:

    May 10 20:26:48 vpn-server charon: 12[IKE] DH group MODP_2048 inacceptable, requesting MODP_1024

   The iphone expect modp2048, but your configuration  says modp1024.  Look  back at the suggestion we made for Windows and just use the same configuration.

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