Symptoms
After upgrade to 7.1 FileManager shows either blank page or returns the following error:
Invalid backend response.
Data is not JSON.
TLS is set up in the /etc/proftpd.h2e.conf
file on the NG node, where the webspace is located:
<IfModule mod_tls.c>
TLSEngine on
TLSLog /var/log/h2e-ftp/tls.log
TLSRequired off
TLSRSACertificateFile /etc/proftpd-cert.h2e
TLSVerifyClient off
</IfModule>
Cause
New TLS configuration was not applied during upgrade.
Resolution
Modify /etc/proftpd.h2e.conf
file, adding following string:
TLSOptions NoSessionReuseRequired
Corresponding part of config should looks like:
<IfModule mod_tls.c>
TLSEngine on
TLSLog /var/log/h2e-ftp/tls.log
TLSOptions NoSessionReuseRequired
TLSRequired off
TLSRSACertificateFile /etc/proftpd-cert.h2e
TLSVerifyClient off
</IfModule>
After that restart the ProFTPD service:
# service proftpd restart