IPsec VPN

This VPN stack requires two port to be forwarded from your router to your HDA. These are

 500 UDP and 4500 UDP

Not TCP.

iOS

Go to Settings > Network > VPN > IPSec, enter the settings below and click on Save.

• Description: Amahi IPSec VPN
• Server: YOURNICK.yourhda.com (put your Amahi dyndns address, nickname and host)
• Account: USERNAME
• Password: leave it as "Ask Every Time" or put one if you feel it's safe to leave it there
• Use Certificate: leave it as OFF
• Group Name: Amahi (with a capital A)
• Secret: this is the 4-character you got the when you installed the IPSec VPN app in your HDA
• Proxy: leave it as off

Below you can see how the setup area looks in a few Apple iOS devices.

iPad

It should look something like this on the iPad 2, iOS 4.x

iPhone 3, iPod Touch

It should look something like this on the iPhone 3, iOS 4.x