UPS returned 403 - causes free shipping


https://forum.kartris.com/Topic6957.aspx
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By SAbow - Mon 20 Nov 2017
In the last few days i have received orders that somehow got through with free shipping. I tried it myself and found that if i go to Checkout and put in my shipping address, the shipping dropdown gets filled properly. But if I refresh the page then sometimes it is filled with this:
UPS - Price: $0.00
USPS Media Mail - Price: $5.30

I found this in the error logs:

>> DESCRIPTION:
UPS - Error: The remote server returned an error: (403) Forbidden.



What would be causing this, what do I need to change?
By Paul - Thu 23 Nov 2017
The error is a standard server error code, that is being generated by UPS:

https://en.wikipedia.org/wiki/HTTP_403

Might be worth checking with them if any issues with your UPS account if this is suddenly happening a lot. Although it looks more like the kind of server error that isn't account related, but related to the platform itself.
By SAbow - Tue 28 Nov 2017
I found this post
http://forum.kartris.com/Topic6296.aspx
which says to alter the code to prevent free shipping options to be listed.

I still don't know why I'm getting a 403 error...