Hi Axel,

This is my nginx conf in /etc/nginx/sites-available/erp;

upstream webserver {
server 127.0.0.1:8078 weight=1 fail_timeout=300s;
}


server {
listen 80;
server_name example.com;
location / {
proxy_pass http://127.0.0.1:5000;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-for $remote_addr;
port_in_redirect off;
proxy_connect_timeout 300;
}
}

server {
listen 80;
server_name _;
# server_name erp.example.com;

# Strict Transport Security
add_header Strict-Transport-Security max-age=2592000;

rewrite ^/.*$ https://$host$request_uri? permanent;
}

server {
# server port and name
listen 443 default;
server_name erp.example.com;

# Specifies the maximum accepted body size of a client request,
# as indicated by the request header Content-Length.
client_max_body_size 200m;

# ssl log files
access_log /var/log/nginx/openerp-access.log;
error_log /var/log/nginx/openerp-error.log;

# ssl certificate files
ssl on;
ssl_certificate /etc/ssl/nginx/server.crt;
ssl_certificate_key /etc/ssl/nginx/server.key;

# add ssl specific settings
keepalive_timeout 60;

# limit ciphers
ssl_ciphers HIGH:!ADH:!MD5;
ssl_protocols SSLv3 TLSv1;
ssl_prefer_server_ciphers on;

# increase proxy buffer to handle some ERP web requests
proxy_buffers 16 64k;
proxy_buffer_size 128k;

allow 10.8.8.0/24;
allow 10.9.8.0/24;
deny all;

error_page 403 /error403.html;
location = /index.html {
index index.html;
root /usr/share/nginx/www;
allow all;
}

location / {
proxy_pass http://webserver;
# force timeouts if the backend dies
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;

# set headers
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;

# Let the OpenERP web service know that we're using HTTPS, otherwise
# it will generate URL using http:// and not https://
proxy_set_header X-Forwarded-Proto https;

# by default, do not forward anything
proxy_redirect off;
allow all;
}

# cache some static data in memory for 60mins.
# under heavy load this should relieve stress on the ERP web interface a bit.
location ~* /web/static/ {
proxy_cache_valid 200 60m;
proxy_buffering on;
expires 864000;
proxy_pass http://webserver;
}

}


For your information, 10.8.8.0/24 is tunnel vpn that I allowed and 10.9.8.0/24 is server subnet also allowed.