User authentication failed with iPhone and IPsec VPN

[avalanchis]

Hello,

I've configured a VPN on pfSense using these instructions:

https://www.netgate.com/docs/pfsense/vpn/ipsec/configuring-an-ipsec-remote-access-mobile-vpn-using-ikev2-with-eap-mschapv2.html

I'm able to successfully connect to the VPN my Windows 10 laptop, but when I try to connect my iPhone using the same username and password, I get the following message:

User authentication failed

The iPhone is using iOS 12.1.

Here are the last few entries of the log:

Dec 5 09:30:56	charon		01[ENC] <con-mobile|6> generating IKE_AUTH response 1 [ IDr CERT AUTH EAP/REQ/ID ]
Dec 5 09:30:56	charon		01[ENC] <con-mobile|6> splitting IKE message with length of 1552 bytes into 2 fragments
Dec 5 09:30:56	charon		01[ENC] <con-mobile|6> generating IKE_AUTH response 1 [ EF(1/2) ]
Dec 5 09:30:56	charon		01[ENC] <con-mobile|6> generating IKE_AUTH response 1 [ EF(2/2) ]
Dec 5 09:30:56	charon		01[NET] <con-mobile|6> sending packet: from 74.112.16.144[4500] to 166.137.219.164[19052] (1236 bytes)
Dec 5 09:30:56	charon		01[NET] <con-mobile|6> sending packet: from 74.112.16.144[4500] to 166.137.219.164[19052] (388 bytes)
Dec 5 09:31:26	charon		15[JOB] <con-mobile|6> deleting half open IKE_SA with 166.137.219.164 after timeout
Dec 5 09:31:26	charon		15[IKE] <con-mobile|6> IKE_SA con-mobile[6] state change: CONNECTING => DESTROYING

It seems that the iPhone is never reponding to the IKE_AUTH response 1.

I'm not sure what to do next to troubleshoot this. Thanks in advance for your help!

Alan

[avalanchis]

I figured out the problem.

I had exported and installed the wrong cert on my phone. Instead of installing the CA cert, I had mistakenly installed the "Server Certificate".

After correcting this, I was able to connect to the VPN successfully.

Hopefully this will help someone else.

[murphster_matt]

@avalanchis I am SOOOO glad you commented on the resolution in this thread, I made exactly the same error and after hours of trying and surfing I found your thread, THANKS!

[avalanchis]

@murphster_matt What's funny about this is that I had the same problem when trying to set up a different phone, and I'd completely forgotten about this solution until you posted your comment! Thanks for reminding me!