Can't connect on latest iOS/macOS

[vagifn]

Hi @ss-abramchuk

First of all would like to thank you for taking efforts to build this openvpn wrapper.

I used your latest framework v0.4.0 carefully according to instructions from readme file, however I'm experiencing "can't connect" results with error:

SIOCGIFMTU failed: Device not configured NEVirtualInterfaceAdjustReadBufferSize: interface_get_mtu failed (6), defaulting to max mtu

full console log screenshot:

some details:

• ovpn file is valid (tested on official openvpn client on win10)
• Xcode 11.2.1 (11B500)
• iPhone with iOS 13.2.3
• macOS Mojave 10.14.6 (18G95) - your OpenVPN macOS client project also doesn't work
• entitlements for both targets (app/tunnel ext) include NetworkExtensions and Personal VPN

Could you give me a hint on how to overcome this issue?

PS: I also tried this tutorial (very much similar to yours) and no luck https://medium.com/better-programming/how-to-build-an-openvpn-client-on-ios-c8f927c11e80

[ss-abramchuk]

Hi @vagifn,

You may safely ignore SIOCGIFMTU failed: Device not configured. This error occurs after tunnel provider is shut down.

Getting back to your error, check not only localized description but error code and userInfo dictionary as well. Error code is an int value representing OpenVPNAdapterError enum and userInfo should contain error message.

[vagifn]

Checking these returned the following:

Error Domain=me.ss-abramchuk.openvpn-adapter.error-domain Code=70 
Dump userInfo: {
    NSLocalizedDescription = "Failed to establish connection with OpenVPN server";
    NSLocalizedFailureReason = "Unknown error.";
    "me.ss-abramchuk.openvpn-adapter.error-key.fatal" = 1;
    "me.ss-abramchuk.openvpn-adapter.error-key.message" = "Missing External PKI alias";
}

[vagifn]

resolved by setting OpenVPNConfiguration's .disableClientCert = true as recommended here now adapter is connecting correctly. @ss-abramchuk thanks for the hint!