FTP and FTPS together

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chriskettle
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Joined: 2019-05-16 13:44
First name: Chris
Last name: Kettle

FTP and FTPS together

#1 Post by chriskettle » 2019-05-16 13:51

Hi

I have client that currently has FTPS set up to be used via port 990 and prompt for a certificate, this works fine.

However, the client has asked if a secure and non secure method can be used together so that some can use port 21 and others use the existing 990.

Currently when you browse to ftp.example.com it redirects to port 990 and asks that you accept the cert.

Thanks

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boco
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Joined: 2006-05-01 03:28
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Re: FTP and FTPS together

#2 Post by boco » 2019-05-16 14:06

FTPS on port 990 is FTPS Implicit and not recommended, as it has never been standardized. Officially, it does not exist as an FTP standard.

Please set up the server for FTPS Explicit, chances are that it already is. FTPES uses the same port as unencrypted FTP (21), and the client explicitly switches to secure transmission (using AUTH) before authentication. Thus, both can coexist.

URL redirections usually don't include ports, you only need to specify the correct FTP encryption method in the client.
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