If you want to run OctoPrint behind a reverse proxy such as Nginx, HAProxy, Apache's mod_proxy, Caddy or traefik, you can find some configuration examples below.
On top of making sure that websocket forwarding works properly through your proxy, please pay special attention to the forwarding options and additional headers. In order for OctoPrint to properly and securely work behind one or more reverse proxies, it is of utmost importance you make sure the following headers are correctly configured:
X-Forwarded-For: Needs to contain the connecting client's IP, otherwise OctoPrint will think your reverse proxy is the client and possibly not behave properly or even bypass some of the security checks if you have "autologin local" configured.X-Forwarded-Hostor alternativelyX-Forwarded-ServerandX-Forwarded-Port: Needs to contain the originalHostheader used for the request, so server name and optionally the port number used by the connecting client to make the request. Without this configured correctly, OctoPrint might generate wrong external links and cookies and thus not work properly.X-Forwarded-ProtoorX-Scheme: If your reverse proxy is used to access OctoPrint throughhttps, this needs to contain that, otherwise OctoPrint won't be able to correctly generate external links and cookies and thus not work properly.X-Script-Name: If your reverse proxy makes OctoPrint accessible on a subpath (e.g.http://example.com/octoprint), this needs to be set to said subpath (e.g./octoprint). Otherwise OctoPrint won't be able to correctly generate external links and cookies, and thus not work properly.
Failure to correctly configure your reverse proxy will lead to issues, including a possible inability to login or undermining your security!
Starting with OctoPrint 1.8.4, OctoPrint also ships with a handy test page that you can use to verify and/or debug your configuration. You can find it under /reverse_proxy_test/ on your instance, e.g. http://octopi.local/reverse_proxy_test/:
Configuration Examples
Nginx
For Nginx the basic forwarding configuration is something like this:
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}
upstream "octoprint" {
server 127.0.0.1:5000;
}
upstream "mjpg-streamer" {
server 127.0.0.1:8080;
}
server {
listen 80;
server_name localhost;
location / {
proxy_pass http://octoprint/;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Scheme $scheme;
proxy_http_version 1.1;
client_max_body_size 0;
}
location /webcam/ {
proxy_pass http://mjpg-streamer/;
}
# redirect server error pages to the static page /50x.html
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
}
Warning
Be extra sure to include
proxy_http_version 1.1or the web socket connection will fail.
If you want to serve OctoPrint on a different base URL than / (e.g. /octoprint/), you'll need to adjust its location definition slightly by changing the location path itself, the proxy_pass target and adding the X-Script-Name header:
location /octoprint/ {
proxy_pass http://octoprint/; # make sure to add trailing slash here!
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Scheme $scheme;
proxy_set_header X-Script-Name /octoprint;
proxy_http_version 1.1;
client_max_body_size 0;
}
HAProxy 2.x
If you just want to run OctoPrint on the server root of the reverse proxy with mjpg-streamer running under /webcam, the following configuration is sufficient:
global
maxconn 4096
user haproxy
group haproxy
daemon
log 127.0.0.1 local0 debug
defaults
log global
mode http
option httplog
option dontlognull
retries 3
option redispatch
option http-server-close
option forwardfor
maxconn 2000
timeout connect 5s
timeout client 15min
timeout server 15min
frontend public
bind *:80
use_backend webcam if { path_beg /webcam/ }
default_backend octoprint
backend octoprint
option forwardfor
server octoprint1 127.0.0.1:5000
backend webcam
http-request replace-path /webcam/(.*) /\1
server webcam1 127.0.0.1:8080
If you want to make it run on a different base URL, you'll need to instruct HAProxy to send a X-Script-Name header with each forwarded request to make OctoPrint generate correct URLs on its pages:
backend octoprint
http-request replace-path /octoprint/(.*) /\1
http-request set-header X-Script-Name /octoprint
option forwardfor
server octoprint1 127.0.0.1:5000
If you also want to run it SSL encrypted with HAProxy being the SSL terminator, you should also send a header of X-Forwarded-Proto with each forwarded request to indicate https requests. You can configure this in the backend section like this:
backend octoprint
# ...
http-request set-header X-Forwarded-Proto https if { ssl_fc }
# ...
Caddy
For a basic reverse proxy on port 80 use the following:
:80 {
handle_path /webcam/* {
reverse_proxy localhost:8080
}
reverse_proxy localhost:5000
}
For a managed domain example.com, this is how to run OctoPrint on a subdomain with https termination:
octoprint.example.com {
handle_path /webcam/* {
reverse_proxy localhost:8080
}
reverse_proxy localhost:5000 {
header_up X-Forwarded-Proto {scheme}
}
}
If you want to add a path, here's how you'd go about this, assuming you want OctoPrint to be accessible under https://example.com/octoprint/:
example.com {
handle_path /octoprint/* {
handle_path /webcam/* {
reverse_proxy localhost:8080
}
reverse_proxy localhost:5000 {
header_up X-Forwarded-Proto {scheme}
header_up X-Script-Name /octoprint
}
}
}
Traefik
Assuming a managed domain example.com and an https entrypoint websecure, this is how to run OctoPrint on a subdomain with https termination:
http:
routers:
octoprint:
rule: Host(`octoprint.example.com`)
entrypoints:
- websecure
service: octoprint
services:
octoprint:
loadBalancer:
servers:
- url: "http://octopi:80"
If you want to add a path, here's how you'd go about this, assuming you want OctoPrint to be accessible under example.com/octoprint/:
http:
routers:
octoprint:
rule: Host(`example.com`) && PathPrefix(`/octoprint`)
entrypoints:
- websecure
middlewares:
- add-trailing-slash
- octoprint-strip-prefix
- octoprint-script-name
service: octoprint
middlewares:
add-trailing-slash:
redirectRegex:
regex: "^(https?://[^/]+/[a-z0-9_-]+)$"
replacement: "${1}/"
permanent: true
octoprint_stripprefix:
stripPrefix:
prefixes:
- "/octoprint"
octoprint_scriptname:
headers:
customRequestHeaders:
X-Script-Name: "/octoprint"
services:
octoprint:
loadBalancer:
servers:
- url: "http://octopi:80"
Apache
Apache is somewhat heavy weighted compared to other options, and the configuration is also a bit messy. If possible it's highly recommended to rather use another option.
For Apache (with mod_proxy, mod_proxy_http, mod_proxy_wstunnel and mod_headers enabled) the basic configuration is something among these lines:
<Location />
ProxyPass http://<myOctoPrintHost>:5000/
ProxyPassReverse http://<myOctoPrintHost>:5000/
RewriteEngine on
RewriteCond %{HTTP:UPGRADE} =websocket [NC]
RewriteRule .* ws://<myOctoPrintHost>%{REQUEST_URI} [P,L]
</Location>
or with https:
<Location />
RequestHeader set X-SCHEME https
ProxyPass http://<myOctoPrintHost>:5000/
ProxyPassReverse http://<myOctoPrintHost>:5000/
RewriteEngine on
RewriteCond %{HTTP:UPGRADE} =websocket [NC]
RewriteRule .* ws://<myOctoPrintHost>%{REQUEST_URI} [P,L]
</Location>
If you want to use a different base URL, the configuration will be slightly different:
<Location /octoprint/>
RequestHeader set X-SCRIPT-NAME /octoprint/
ProxyPassReverse http://<myOctoPrintHost>:5000/
RewriteEngine on
RewriteCond %{HTTP:UPGRADE} =websocket [NC]
RewriteRule /octoprint/(.*) ws://<myOctoPrintHost>/$1 [P,L]
RewriteCond %{HTTP:UPGRADE} !=websocket [NC]
RewriteRule /octoprint/(.*) http://<myOctoPrintHost>/$1 [P,L]
</Location>
If you also want to use https:
<Location /octoprint/>
RequestHeader set X-SCRIPT-NAME /octoprint/
RequestHeader set X-SCHEME https
ProxyPassReverse http://<myOctoPrintHost>:5000/
RewriteEngine on
RewriteCond %{HTTP:UPGRADE} =websocket [NC]
RewriteRule /octoprint/(.*) ws://<myOctoPrintHost>/$1 [P,L]
RewriteCond %{HTTP:UPGRADE} !=websocket [NC]
RewriteRule /octoprint/(.*) http://<myOctoPrintHost>/$1 [P,L]
</Location>
and a failed attempt to use the 
