FTP Question(s)

I'm trying to set up an FTP with a vendor and would like to keep it on
our iSeries and I can't get it to work for me. The iSeries FTP just
waits after connecting then times out.

The only PC ftp app that I have been able to get working is "Core FTP
Lite" and I have it set to FTPS (SSL DIRECT) using port 990. When I try
and connect I get a prompt that asks me if I want to accept their
certificate information (once or always). Now this seems to only store
the name and some minimal information somewhere but that is it and no
where it can be exported. I've contacted the vendor and they say they
don't have a Cert that they send out.

So after that long winded explanation here is my question. Is there
some way to get FTP on the iSeries to except their "certificate" (I'm
assuming that is what they are sending one out, but really don't know as
I've not trace the connection to see, and they say they are not).

I didn't know if there was some entry I needed to make for them in the
Digital Certificate Manager. Or since other PC FTP clients don't work
either, is this some FTP option that the iSeries doesn't support?

One other FTP Client gives me this message:

"Peer certificate cannot be authenticated with known CA certificates.
[60] Additional information: SSL certificate problem, verify that the CA
cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate
verify failed."

Which says to me, that they do have a certificate I have to validate
against, but since I'm not well versed in this I could be totally wrong.

Thanks,
-- Jim