ffserver.conf:

Port 51888
BindAddress 0.0.0.0
MaxHTTPConnections 2000
MaxClients 1000
MaxBandwidth 3000
CustomLog -
#NoDaemon

<Feed feed1.ffm>
        File /tmp/feed1.ffm
        FileMaxSize 200K
        ACL allow 127.0.0.1
        ACL allow 188.x.x.x
</Feed>

# if you want to use mpegts format instead of flv
# then change "live.flv" to "live.ts"
# and also change "Format flv" to "Format mpegts"
<Stream live.flv>
        Format flv
        Feed feed1.ffm

        VideoCodec libx264
        VideoFrameRate 30
        VideoBitRate 512
        VideoSize 320x240
        AVOptionVideo crf 23
        AVOptionVideo preset medium
        # for more info on crf/preset options, type: x264 --help
        AVOptionVideo flags +global_header

        AudioCodec aac
        Strict -2
        AudioBitRate 128
        AudioChannels 2
        AudioSampleRate 44100
        AVOptionAudio flags +global_header
</Stream>

##################################################################
# Special streams
##################################################################
#<Stream stat.html>
#       Format status
#       # Only allow local people to get the status
#       ACL allow localhost
#       ACL allow 192.168.0.0 192.168.255.255
#</Stream>
#
# Redirect index.html to the appropriate site
#<Redirect index.html>
#       URL http://www.ffmpeg.org/
#</Redirect>
##################################################################

-----------------------------------------------------------------------------------------------------------

ffserver cmd & output:

ffserver -d -f ffserver.conf
ffserver version N-47342-g5473f62 Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec  1 2012 14:30:43 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --disable-shared --enable-static --prefix=/x/ --extra-ldflags=-I/x/include --extra-ldflags=-L/x/lib --extra-cflags=-I/x/include --enable-gpl --enable-libaacplus --enable-libmp3lame --enable-librtmp --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-vdpau --enable-bzlib --enable-pthreads --enable-zlib --disable-stripping --enable-runtime-cpudetect --enable-postproc --enable-swscale
  libavutil      52. 10.100 / 52. 10.100
  libavcodec     54. 78.100 / 54. 78.100
  libavformat    54. 41.100 / 54. 41.100
  libavdevice    54.  3.101 / 54.  3.101
  libavfilter     3. 23.104 /  3. 23.104
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.101 /  0. 17.101
  libpostproc    52.  2.100 / 52.  2.100
Sun Dec  2 10:04:35 2012 FFserver started.
Sun Dec  2 10:04:42 2012 188.x.x.x. - - New connection: POST /feed1.ffm
Sun Dec  2 10:04:43 2012 188.x.x.x - - [POST] "/feed1.ffm HTTP/1.1" 200 834

------------------------------------------------------------------------------------------------------------

ffmpeg cmd & output: (on the same box)

ffmpeg -re -i x.mp4 -f flv -ar 44100 http://127.0.0.1:51888/feed1.ffm
ffmpeg version N-47342-g5473f62 Copyright (c) 2000-2012 the FFmpeg developers
  built on Dec  1 2012 14:30:43 with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --disable-shared --enable-static --prefix=/x/ --extra-ldflags=-I/x/include --extra-ldflags=-L/x/lib --extra-cflags=-I/x/include --enable-gpl --enable-libaacplus --enable-libmp3lame --enable-librtmp --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-vdpau --enable-bzlib --enable-pthreads --enable-zlib --disable-stripping --enable-runtime-cpudetect --enable-postproc --enable-swscale
  libavutil      52. 10.100 / 52. 10.100
  libavcodec     54. 78.100 / 54. 78.100
  libavformat    54. 41.100 / 54. 41.100
  libavdevice    54.  3.101 / 54.  3.101
  libavfilter     3. 23.104 /  3. 23.104
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.101 /  0. 17.101
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'x.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isom
    creation_time   : 2012-11-26 18:03:39
  Duration: 00:20:56.64, start: 0.000000, bitrate: 1137 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x404, 1018 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
    Metadata:
      creation_time   : 2012-11-26 17:56:19
      handler_name    : GPAC ISO Video Handler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 114 kb/s
    Metadata:
      creation_time   : 2012-11-26 18:03:40
      handler_name    : GPAC ISO Audio Handler
Output #0, flv, to 'http://127.0.0.1:51888/feed1.ffm':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isom
    encoder         : Lavf54.41.100
    Stream #0:0(und): Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 720x404, q=2-31, 200 kb/s, 1k tbn, 23.98 tbc
    Metadata:
      creation_time   : 2012-11-26 17:56:19
      handler_name    : GPAC ISO Video Handler
    Stream #0:1(und): Audio: mp3 ([2][0][0][0] / 0x0002), 44100 Hz, stereo, fltp
    Metadata:
      creation_time   : 2012-11-26 18:03:40
      handler_name    : GPAC ISO Audio Handler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> flv)
  Stream #0:1 -> #0:1 (aac -> libmp3lame)
Press [q] to stop, [?] for help
av_interleaved_write_frame(): Connection reset by peer