Redirect loop whenever I try to create a promotion?

[shout]

What could cause this?

 

I am on SSL, so I thought maybe it could be related to the WHMCS SSL System URL.

 

WHMCS is installed on https://whmcs.mydomain.com. If I put HTTPS for the System URL, it makes the SSL System URL blank.

 

WHMCS System URL: https://whmcs.mydomain.com
WHMCS SSL System URL: https://whmcs.mydomain.com

 

becomes -->

 

WHMCS System URL: https://whmcs.mydomain.com
WHMCS SSL System URL: 

 

At any rate, why would I only get in the redirect loop when trying to add a promotion code?

[shout]

Update: I also get a redirect loop whenever trying to renew a domain.

 

I can change the problem if I change the System URL and SSL System URL.

 

With this configuration:

 

WHMCS System URL: https://whmcs.mydomain.com
WHMCS SSL System URL:

 

...I get a redirect loop on many actions.

 

With this configuration:

WHMCS System URL: http://whmcs.mydomain.com
WHMCS SSL System URL: https://whmcs.mydomain.com

 

...I get sent to the *client* login screen on the same actions. What is happening here? Help!

Edited October 6, 2014 by shout

[brian!]

does the information in the page below apply to you?

 

http://forum.whmcs.com/showthread.php?41487-Cart-amp-Client-area-302-redirect-loop-%28nginx-SSL%29

[shout]

does the information in the page below apply to you?

 

http://forum.whmcs.com/showthread.php?41487-Cart-amp-Client-area-302-redirect-loop-%28nginx-SSL%29

 

Thanks for the response! It's similar. He states:

 

If I leave the SSL system URL blank, the pages load fine.

 

But that is not true for me--if I leave that blank, I do get the redirect loop.

 

However, I will look into whether nginx/fastcgi is right for me. Maybe it will help.

[Kian]

Are you running your WHMCS on a dedicated (not shared) IP address?