This is the server block I am using.

server {
listen 443;
server_name domain.com;
# You can increase the limit if your need to.
client_max_body_size 800M;
ssl on;
ssl_certificate /home/domain/ssl.combined;
ssl_certificate_key /home/domaint/ssl.key;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # don’t use SSLv3 ref: POODLE
location / {
ssi on;
proxy_pass https://192.168.56.101/;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header Host $http_host;
}
# BOSH
location /http-bind {
proxy_pass http://192.168.56.101:5280/http-bind;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header Host $http_host;
}
# xmpp websockets
location /xmpp-websocket {
proxy_pass http://192.168.56.101:5280/xmpp-websocket;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
tcp_nodelay on;
}
}