How to make external broadcast of RTMP stream via ffmpeg?

Question

RTMP

I need to make an external broadcast of an RTMP stream from a file so that it can be played on the site. It turns out to do it locally, i.e. I start the broadcast and I can connect to it locally, but I can’t connect from outside, what am I doing wrong?
nginx.conf config

#user  nobody;
worker_processes  auto;

worker_rlimit_nofile 65536;

events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        location / {
            root   html;
            index  index.html index.htm;
        }

        # rtmp stat
        location /stat {
            rtmp_stat all;
            rtmp_stat_stylesheet stat.xsl;
        }

        location /stat.xsl {
            root /usr/build/nginx-rtmp-module;
        }

        # rtmp control
        location /control {
            rtmp_control all;
        }

        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

    }


}

rtmp_auto_push on;
rtmp_auto_push_reconnect 1s;

rtmp {
    server {
        listen 1935;
        ping 30s;
        notify_method get;
        application live {
            live on;

            allow play all;
            allow publish 127.0.0.1;
        }
    }
}

I start streaming like this:

ffmpeg -re -i /var/videos/test.mp4 -c copy -f flv rtmp://localhost/live/stream

[[email protected] ~]#  ffmpeg -re -i /var/videos/test.mp4 -c copy -f flv rtmp://localhost/live/stream
ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 13 2014 13:00:18 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --disable-stripping
  libavutil      52. 66.100 / 52. 66.100
  libavcodec     55. 52.102 / 55. 52.102
  libavformat    55. 33.100 / 55. 33.100
  libavdevice    55. 10.100 / 55. 10.100
  libavfilter     4.  2.100 /  4.  2.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/videos/test.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2017-08-29 08:33:09
  Duration: 00:04:39.85, start: 0.000000, bitrate: 1123 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 994 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2017-08-29 08:33:09
      handler_name    : ISO Media file produced by Google Inc. Created on: 08/29/2017.
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2017-08-29 08:33:09
      handler_name    : ISO Media file produced by Google Inc. Created on: 08/29/2017.
Output #0, flv, to 'rtmp://localhost/live/stream':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    encoder         : Lavf55.33.100
    Stream #0:0(und): Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 994 kb/s, 25 fps, 1k tbn, 90k tbc (default)
    Metadata:
      creation_time   : 2017-08-29 08:33:09
      handler_name    : ISO Media file produced by Google Inc. Created on: 08/29/2017.
    Stream #0:1(und): Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, stereo, 125 kb/s (default)
    Metadata:
      creation_time   : 2017-08-29 08:33:09
      handler_name    : ISO Media file produced by Google Inc. Created on: 08/29/2017.
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=   15 fps=0.0 q=-1.0 size=     543kB time=00:00:00.52 bitrate=8560.7kbits/
frame=   28 fps= 28 q=-1.0 size=    1061kB time=00:00:01.04 bitrate=8355.8kbits/
frame=   41 fps= 27 q=-1.0 size=    1419kB time=00:00:01.56 bitrate=7452.9kbits/
frame=   53 fps= 26 q=-1.0 size=    1430kB time=00:00:02.04 bitrate=5744.0kbits/
frame=   66 fps= 26 q=-1.0 size=    1441kB time=00:00:02.56 bitrate=4610.7kbits/
frame=   79 fps= 26 q=-1.0 size=    1451kB time=00:00:03.08 bitrate=3860.5kbits/
frame=   91 fps= 26 q=-1.0 size=    1463kB time=00:00:03.56 bitrate=3365.5kbits/
frame=  104 fps= 26 q=-1.0 size=    1473kB time=00:00:04.08 bitrate=2958.5kbits/
frame=  117 fps= 26 q=-1.0 size=    1487kB time=00:00:04.60 bitrate=2647.3kbits/

It can be seen that the broadcast is working. If you try to connect to it locally, then everything works, but external connections fail. All ports are open.
Trying to reproduce:
ffplay rtmp://5.23.55.156/live/stream

Through VLC:

Answer 1

And when you try to play, for example, from the address rtmp://localhost/live/stream does everything work? I think that there is a problem in setting nat