225897 - No official FTP support

Status: VERIFIED DUPLICATE of bug 136351

(Core Graveyard :: Networking: FTP, defect)

Description

[THX Corporate]

User-Agent:       Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Build Identifier: 

Mozilla does not support FTP:

IT uses passive mode, which is not required by RFC959 specifications. And it 
is written there, that if any program supports FTP it must be able to work 
without passive mode, what your browser (and opera) cannot, therefore your 
browser doesn't support FTP.
Read the following:
The text from rfc 959, FTP protocol:
"
5.  DECLARATIVE SPECIFICATIONS

   5.1.  MINIMUM IMPLEMENTATION

      In order to make FTP workable without needless error messages, the
      following minimum implementation is required for all servers:

         TYPE - ASCII Non-print
         MODE - Stream
         STRUCTURE - File, Record
         COMMANDS - USER, QUIT, PORT,
                    TYPE, MODE, STRU,
                      for the default values
                    RETR, STOR,
                    NOOP.

      The default values for transfer parameters are:

         TYPE - ASCII Non-print
         MODE - Stream
         STRU - File

      All hosts must accept the above as the standard defaults.

"

      All hosts MUST accept the above as the standard defaults.
Mozilla doesn't support answer 500 command not supported, not even 502 command 
not implemented to PASV command.
I expected answer like - no suppor for acive FTP, but not: "502 Command not 
supported.", or whatever server responds...

So, either repair this, or remove FTP support from specifications.
I think, it would be reasonable to give the user the oportunity to use active 
FTPs. There can be some security warnings, but if you don't allow this, you 
don't support FTP according to RFC959.

Reproducible: Always

Steps to Reproduce:
1. Reconnect
2.
3.

Actual Results:  
Connection denied.

Expected Results:  
Connect do FTP.

Comment 1

[Oliver Klee]

*** This bug has been marked as a duplicate of 136351 ***

Comment 2

[Boris Zbarsky [:bzbarsky]]

Verified.