python - Connection error with Gunicorn / Nginx -

i learning nginx , configuring nginx.conf gunicorn. running gunicorn on port 8000 , nginx listening on port 80. works fine, gives "unable connect" error.

here nginx.conf file

user www-data; worker_processes auto; pid /run/nginx.pid;  events {     worker_connections 768;     # multi_accept on;  }   http {      ##     # basic settings     ##      sendfile on;     tcp_nopush on;     tcp_nodelay on;     keepalive_timeout 65;     types_hash_max_size 2048;     # server_tokens off;      # server_names_hash_bucket_size 64;     # server_name_in_redirect off;      include /etc/nginx/mime.types;     default_type application/octet-stream;      ssl_protocols tlsv1 tlsv1.1 tlsv1.2; # dropping sslv3, ref: poodle     ssl_prefer_server_ciphers on;      ##     # logging settings     ##      access_log /var/log/nginx/access.log;     error_log /var/log/nginx/error.log;      ##     # gzip settings     ##      gzip on;     gzip_disable "msie6";      # gzip_vary on;     # gzip_proxied any;     # gzip_comp_level 6;     # gzip_buffers 16 8k;     # gzip_http_version 1.1;     # gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript; 

i have supervisor config file: here supervisor config file

[program:python-activate] directory=<path of directory> command=/home/ashiyap/ianp3.sh gunicorn  proj.wsgi:application  -b 0.0.0.0:8000 autostart=true autorestart=true stderr_logfile=/var/log/supervisor.err.log stdout_logfile=/var/log/supervisor.out.log 

here nginx python conf file

server { # port site served on listen      80; # domain name serve server_name <ipaddress>;   # substitute fqdn , machine's ip address charset     utf-8; #max upload size client_max_body_size 75m;   # adjust taste  # django media location /media  {    root /home/ashiyap/test/wp005_v02.00.00.d2_itr1/proj;      # django project's media files    autoindex off;  }  location /static {    root /home/ashiyap/test/wp005_v02.00.00.d2_itr1/proj;      # django project's static file    autoindex off; }  # finally, send non-media requests django server. location / {      proxy_pass http://<ipaddress>:8000;     proxy_set_header host $host;     proxy_set_header x-real-ip $remote_addr;     proxy_set_header x-forwarded-for $proxy_add_x_forwarded_for; } }