Gulp Vinyl FTP ECONNRESET error after FEAT command - ftp

Question

I am attempting to use the gulp-vinyl-ftp plugin to upload to a remote site.
gulp.task("deploy", ["default"], function () {
var conn = ftp.create({
host: "mywebsite",
user: "****",
password: "******",
// secure: true,
timeOffset: -301,
parallel: 1,
debug: gutil.log
});
var globs = [
"distr/**/*.php",
"!out/vendor/**",
"!out/config.php",
"out/**/*.map",
"out/**/*.css",
"out/**/*.js"
];
return gulp.src(globs)
.pipe(conn.newer("/")).pipe(debug({ title: "Deploy New: " }))
});
However, I am receiving the following error:
events.js:182
throw er; // Unhandled 'error' event
^
Error: read ECONNRESET
at exports._errnoException (util.js:1016:11)
at TCP.onread (net.js:609:25)
The debug output is as follows:
[08:37:28] [connection] < '220 Microsoft FTP Service\r\n'
[08:37:28] [parser] < '220 Microsoft FTP Service\r\n'
[08:37:28] [parser] Response: code=220, buffer='Microsoft FTP Service'
[08:37:28] [connection] > 'USER xxx'
[08:37:29] [connection] < '331 Password required\r\n'
[08:37:29] [parser] < '331 Password required\r\n'
[08:37:29] [parser] Response: code=331, buffer='Password required'
[08:37:29] [connection] > 'PASS xxxx'
[08:37:29] [connection] < '230 User logged in.\r\n'
[08:37:29] [parser] < '230 User logged in.\r\n'
[08:37:29] [parser] Response: code=230, buffer='User logged in.'
[08:37:29] [connection] > 'FEAT'
It ends there.
However, I can connect just fine through WinSCP.
. 2017-11-08 08:36:24.161 Connecting to mywebsite ...
. 2017-11-08 08:36:24.192 Connected with mywebsite. Waiting for welcome message...
< 2017-11-08 08:36:24.285 220 Microsoft FTP Service
> 2017-11-08 08:36:24.285 USER xxxx
< 2017-11-08 08:36:24.379 331 Password required
> 2017-11-08 08:36:25.861 PASS ********
< 2017-11-08 08:36:25.970 230 User logged in.
> 2017-11-08 08:36:25.970 SYST
. 2017-11-08 08:36:26.064 The server is probably running Windows, assuming that directory listing timestamps are affected by DST.
< 2017-11-08 08:36:26.064 215 Windows_NT
> 2017-11-08 08:36:26.064 FEAT
< 2017-11-08 08:36:26.157 211-Extended features supported:
< 2017-11-08 08:36:26.157 LANG EN*
< 2017-11-08 08:36:26.157 UTF8
< 2017-11-08 08:36:26.157 AUTH TLS;TLS-C;SSL;TLS-P;
< 2017-11-08 08:36:26.157 PBSZ
< 2017-11-08 08:36:26.157 PROT C;P;
< 2017-11-08 08:36:26.157 CCC
< 2017-11-08 08:36:26.157 HOST
< 2017-11-08 08:36:26.157 SIZE
< 2017-11-08 08:36:26.157 MDTM
< 2017-11-08 08:36:26.157 REST STREAM
< 2017-11-08 08:36:26.157 211 END
> 2017-11-08 08:36:26.157 OPTS UTF8 ON
< 2017-11-08 08:36:26.251 200 OPTS UTF8 command successful - UTF8 encoding now ON.
. 2017-11-08 08:36:26.298 Connected
I have tried both the IP address and domain name in the host field, commenting out the the timeOffset and parallel options.
I am not sure where to go from here honestly; any advice would be appreciated.
Thanks.

Answer 1

You will find lot of posts about IIS mysteriously (and inconsistently) closing a connection after receiving FEAT command.
I have not found any definitive solution, but working workaround seems to be to deny the FEAT command (if Gulp can handle that).
In IIS manager, go to FTP > FTP Request Filtering > Commands tab > Actions > Deny command and type FEAT.
See also Microsoft FTP fails to connect after the client requests the list of features (FEAT).