If DNS and VPN are no Option for you, you can think about writing a simple dynamic IP distributor. (I’ll call this DID)
A DID can easily realised by a small bashscript running on you seafile server which does the following:
- Derermine periodically your IP address
- Check if address had been changed
- Send this new address via your faforit service such as email, threema, signal, IRC …
You can then use the new IP address in your client/browser.
If I could not I could nit use DNS this would be my approach. Innfact changeing IP address all my clients everyday would be annoing, but several provirers change the IP address not that often.
If DID is an option for you and you need help in writing such a script feel free to ask me about it.