NEVPNManager stop working with iOS 14 beta

Question

I've tried to run my app on iOS 14 beta. It works fine on iOS 13 but can't connect to any server on iOS 14 beta. NEVPNManager.shared().connection.startVPNTunnel() doesn't throw any error and NEVPNStatus become .disconnected with any server that I connect. I can't find what changed in NEVPNManager on iOS 14.

This is configuration of my manager:

let p = NEVPNProtocolIKEv2()
p.authenticationMethod = NEVPNIKEAuthenticationMethod.none
p.serverAddress = account.server
p.disconnectOnSleep = false
p.deadPeerDetectionRate = NEVPNIKEv2DeadPeerDetectionRate.medium
p.username = account.account
p.passwordReference = KeychainWrapper.passwordRefForVPNID()
p.disableMOBIKE = false
p.disableRedirect = false
p.enableRevocationCheck = false
p.enablePFS = false
p.useExtendedAuthentication = true
p.useConfigurationAttributeInternalIPSubnet = false
p.remoteIdentifier = account.server
p.localIdentifier = account.account
            
let manager = NEVPNManager.shared()
manager.protocolConfiguration = p
manager.isEnabled = true
let ruleConnect = NEOnDemandRuleConnect()
ruleConnect.probeURL = account.probeUrl
manager.onDemandRules = [ruleConnect]
manager.isOnDemandEnabled = true

It's because of your server, compatible your servers with IPv6. — mohsen, Sep 27 '20 at 11:17
I'm having similar issues. If I create the vpn profile manually, it connects just fine. but when I connect from code, it disconnects immediately — Zayin Krige, Oct 08 '20 at 10:46

score 0 · Accepted Answer · answered Nov 10 '20 at 11:19

It seems Apple changed the ciphers on iOS 14(with documented), you can see some of the threads here:

https://developer.apple.com/forums/thread/659209
https://developer.apple.com/forums/thread/657792
https://developer.apple.com/forums/thread/657792
https://developer.apple.com/forums/thread/661298?page=2

If you're using StrongSwan like me, you can fix it by update the configs from your VPN server, just set ike=aes256-sha2_256-modp2048 and esp=aes256-sha2_256, and restart StrongSwan, then it works for iOS 14. Refs: https://wiki.strongswan.org/projects/strongswan/wiki/AppleClients

NEVPNManager stop working with iOS 14 beta

1 Answers1