It's actually not that simple. I am bound by the limitations of the networking library I am using (Internet Direct). It has a very high fail-to-success ratio on FTP connections and, how about that, it was the most reliable library I could get my hands on. It looks like it doesn't want to work with your server.
Remote Control 4 tries to use another trick. Instead of FTP downloads, it tries to fetch the archives from your server by splitting them in 1Mb chunks and transferring them over HTTP(S). Of course, that comes with another set of challenges, as some servers will throw a 500 error when they see a high number of requests coming from the same IP.
Overall, I have concluded that it's easier to send the man to the moon than write a reliable remote backup client. I am not sure I am going to keep developing Remote Control at all. It seems to be taking way too much development time and I always have to work around several limitations posed by the available libraries and server configurations.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!