From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.help Subject: Re: ange-ftp and explicit/implicit TLS Date: Sat, 26 Dec 2020 21:49:10 +0200 Message-ID: <83r1ncl555.fsf@gnu.org> References: <5d44-5fe79080-275-53124080@198151915> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="20658"; mail-complaints-to="usenet@ciao.gmane.io" To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Dec 26 20:49:57 2020 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ktFZb-0005Az-Jw for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 26 Dec 2020 20:49:55 +0100 Original-Received: from localhost ([::1]:34850 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ktFZa-0000Et-MB for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 26 Dec 2020 14:49:54 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43198) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ktFZ7-0000Ej-4Z for help-gnu-emacs@gnu.org; Sat, 26 Dec 2020 14:49:25 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:38486) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ktFZ6-0008Dm-U3 for help-gnu-emacs@gnu.org; Sat, 26 Dec 2020 14:49:24 -0500 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:3185 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1ktFZ6-0002JJ-Bv for help-gnu-emacs@gnu.org; Sat, 26 Dec 2020 14:49:24 -0500 In-Reply-To: <5d44-5fe79080-275-53124080@198151915> (david.diem@uni-konstanz.de) X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:126795 Archived-At: > From: "David Diem" > Date: Sat, 26 Dec 2020 20:35:09 +0100 > > I'm trying to connect to a FTP server that requires TLS -- that is, FTPS. I learned that /bin/ftp cannot do this, so I changed ange-ftp-ftp-program-name to lftp. Ange-ftp still responds with "550 - TLS required on the control channel". In a shell outside of emacs, "lftp myuser@myserver.com" can succesfully log in (the TLS information is given on stdout) -- however, that is not the case for the command "lftp myserver.com" (without the "user@") and a subsequent "DIR" or similar. The difference of the non-emacs (non-ange-ftp) shell's output differs to that of ange-ftp in that the first says "AUTH TLS" at an early point. > > Is this what is called explicit TLS? How could one tell ange-ftp to say "AUTH TLS" early on? My real question, though, is why do the outputs of ange-ftp and non-ange-ftp "plain" lftp differ anyway? As I understand the ange-ftp-name-format regexp, ange starts by saying something in the form of user@server.com, that is, it does include the user right form the beginning. If you look at defcustoms in ange-ftp.el, you will see that it allows to customize the name of the program to use; "ftp" is just the default. Maybe this will help you solve your problem.