I have an interesting concern regarding connecting to my Dashlane VPN on Apple OS devices. Including iOS 13 and MacOS 10.15 Catalina. Dashlane tech support has already said I'm on my own.

On my Android and Windows devices, the Dashlane VPN goes right through and connects just fine. I can also ping the VPN server by FQDN (fully qualified domain name “www.example.com”) from my Apple devices.

I have looked at the “/etc/racoon/racoon.cfg” file. From what I can tell, it seems to be configured correctly, it has been left at default.

In the console utility log on macOS the last IPSec log record reports that “the server did not respond”.

I can see that it is using IKEv2 protocol. I have tested a manually configured IKEv2 VPN to the same server and it still reports "the server did not respond".

I have tested various DNS servers: 8.8.8.8, 8.8.4.4, 208.67.222.222, 208.67.220.220, 75.75.75.75, 75.75.76.76. Doesn't make the difference.

I am on IPv4 and I have my IP address retrieved through DHCP from my ISP.

I found that the Dashlane VPN on macOS will connect successfully if I renew the DHCP configuration and click connect on the VPN roughly simultaneously.

I am sure this is a tricky one as I wouldn’t be bringing it to a forum if it weren’t.

There must be something interfering with respect to the protocol from macOS and iOS either on my ISP or the router.

I look forward to some ideas on this one.