IIS 5 & IIS 6
IIS FTP Windows Server 2012 issue
Re: IIS FTP Windows Server 2012 issue
Dec 19, 2016 07:34 AM|Yuk Ding|LINK
Have you created the allow authorization rule with read/write permission for your user? Besides, you could try to allow .jpg and STOR command in FTP request filter.
The server side applicationhost.config probably have some FTP configuration which is blocking your site node permission.
You could also enable the process monitor to diagnose this issue.
Please check whether firewall or anti-virus is blocking the write command.