@user_614688609960018_614688609960018 The new firmware from Reolink solved my problem. Their support staff was very helpful and I would strongly recommend that you contact them if you have issues.

@joseph-chircop_497308027822318 I forwarded my configuration and logs to Reolink yesterday and will be testing some software for them shortly. The tcpdump is very do-able and if the new software doesn't help I will be trying it. I will also give wireshark a try. Thank you for these suggestions. I have also learned that Reolink cameras use explicit. Thank you!

OK, here is a screen shot of my vsftpd.conf file. Google adamtheautomator and vsftpd. He has written a good guide.

I've been working on the Reolink ftps Pi vsftpd problem for a few days. I am trying to post my vsftpd.conf file that works with Reolink ftp. Note this only works for ftp, not ftps. Note there are some throwaway lines in the file intended to make ftps work. I have requested some details from Reolink regarding Reolink's implementation of ftps, as I am able to use a Filezilla client to acces my vsftpd server with both implicit and explicit ftps. Please post your progress.

Lesson learned... Don't put your camera on the guest network and expect to ftp back to your lan.

Don't forget to update ufw with
sudo ufw allow 30000:31000/tcp
and
sudo ufw allow 20,21,990/tcp

Look for my vsftpd.conf file in an upcoming reply... Somehow it's getting blocked for containing links. (Which it does not).