Zimbra Remote Calendar over FTP

[steuni]

Hello,

I'm trying to add a remote ICS calendar that lives at ftp://admin:password@server.domain.c...pportunity.ics
(It's an OpenERP installation that publishes calendars on an FTP server)
to my ZCS 5.0.16_GA_2921.UBUNTU6 installation on Ubuntu dapper.

I can wget the calendar from the Zimbra server so it's not a firewall problem, and if I copy the ICS file to an HTTP location without authentication it works fine. But with the above mentioned URL it just says:

Failure communicating with remote server. Please try again later.

Is the FTP protocol not supported ?
Is specifying authentication not supported ?
Is specifying a different port not supported ?
Or is this supposed to work ?

Cheers,

Jerome

[nok2009]

Any solution for that problem?

Thanks
Pablo.