Hi there,
I've got a 450G acting as the hotspot controller and a separate RB800 for the UM radius. At the moment when I try and sign up for an account to test it out, paypal authorisation and completion is taking a very long time. I can't see any reason why this would be occurring.

Anyone with a suggestion?

Right, this issue seems to be with any secure webpage.

What RouterOS version are you using? If it is anything but V5rc4, you are lucky you can take PayPal payments at all. The explanation is here:
http://forum.mikrotik.com/viewtopic.php?f=2&t=45098

Hi,

I'm actually using your script now on 4.13, so hopefully that will fix it. I'm going to do some testing now.
How are you finding 5rc4, in terms of usage (if are you using it now)?

I'm still using the script and it is doing well. I have not tried V5rc4 yet, but will try it soon. I use my backup router as a test unit, so I keep a stable (non-beta) version on it.