---
id: reverse-proxy
title: 'Reverse Proxy Setup'
---
Using a reverse proxy is a common practice. The following configurations are the
most recommended and used ones.
**Important**, the headers are considered to resolve the public are `X-Forwarded-Proto` for the protocol and `Host` for the domain, please include them in your configuration.
# Apache
Apache and `mod_proxy` should **not decode/encode slashes** and leave them as they are:
For installing at relative path, `/npm`, on the server
```
AllowEncodedSlashes NoDecode
ProxyPass /npm http://127.0.0.1:4873 nocanon
ProxyPassReverse /npm http://127.0.0.1:4873
```
For installing at root path, `/`, on the server
```
ServerName your.domain.com
ServerAdmin hello@your.domain.com
ProxyPreserveHost On
AllowEncodedSlashes NoDecode
ProxyPass / http://127.0.0.1:4873/ nocanon
ProxyPassReverse / http://127.0.0.1:4873/
```
### Configuration with SSL {#configuration-with-ssl}
Apache virtual server configuration.
```apache
ServerName npm.your.domain.com
SSLEngine on
SSLCertificateFile /etc/letsencrypt/live/npm.your.domain.com/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/npm.your.domain.com/privkey.pem
SSLProxyEngine On
ProxyRequests Off
ProxyPreserveHost On
AllowEncodedSlashes NoDecode
ProxyPass / http://127.0.0.1:4873/ nocanon
ProxyPassReverse / http://127.0.0.1:4873/
RequestHeader set X-Forwarded-Proto "https"
```
## Invalid checksum
Sometimes the gzip compression can mess with the request when running `npm install` and result in error messages like this:
```
npm WARN tar TAR_ENTRY_INVALID checksum failure
npm WARN tar zlib: incorrect data check
```
A possible fix for this, can be by disabling gzip compression for the virtual host, by adding this to your config:
```
SetEnv no-gzip 1
```
Resulting in a config like so:
```
AllowEncodedSlashes NoDecode
SetEnv no-gzip 1
ProxyPass /npm http://127.0.0.1:4873 nocanon
ProxyPassReverse /npm http://127.0.0.1:4873
```
You should only add it to your virtual host config, if you are experiencing the issue.
# Nginx
The following snippet is a full `docker` example can be tested in our [Docker examples repository](https://github.com/verdaccio/verdaccio/tree/5.x/docker-examples/reverse_proxy/nginx).
```nginx
upstream verdaccio_v4 {
server verdaccio_relative_path_v4:4873;
keepalive 8;
}
upstream verdaccio_v4_root {
server verdaccio_relative_path_v4_root:8000;
keepalive 8;
}
upstream verdaccio_v3 {
server verdaccio_relative_path_latest_v3:7771;
keepalive 8;
}
server {
listen 80 default_server;
access_log /var/log/nginx/verdaccio.log;
charset utf-8;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://verdaccio_v4_root;
proxy_redirect off;
}
location ~ ^/verdaccio/(.*)$ {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://verdaccio_v4/$1;
proxy_redirect off;
}
location ~ ^/verdacciov3/(.*)$ {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://verdaccio_v3/$1;
proxy_redirect off;
}
}
```
## SSL example {#ssl-example}
```nginx
server {
listen 80;
return 302 https://$host$request_uri;
}
server {
listen 443 ssl http2;
server_name localhost;
ssl_certificate /etc/nginx/cert.crt;
ssl_certificate_key /etc/nginx/cert.key;
ssl on;
ssl_session_cache builtin:1000 shared:SSL:10m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4;
ssl_prefer_server_ciphers on;
location / {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://verdaccio_v4_root;
proxy_read_timeout 600;
proxy_redirect off;
}
location ~ ^/verdaccio/(.*)$ {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://verdaccio_v4_root/$1;
proxy_redirect off;
}
}
```
## Run behind reverse proxy with different domain and port {#run-behind-reverse-proxy-with-different-domain-and-port}
### Sub-directory {#sub-directory}
If the whole URL is being used for Verdaccio, you don't need to define a `url_prefix`, otherwise
you would need something like this in your `config.yaml`.
```yaml
url_prefix: /sub_directory/
```
If you run Verdaccio behind reverse proxy, you may noticed all resource file served as relative path, like `http://127.0.0.1:4873/-/static`
To resolve this issue, **you should send real domain and port to Verdaccio with `Host` header**
Nginx configure should look like this:
```nginx
location / {
proxy_pass http://127.0.0.1:4873/;
proxy_set_header Host $host:$server_port;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
```
For this case, `url_prefix` should **NOT** set in Verdaccio config
---
or a sub-directory installation:
```nginx
location ~ ^/verdaccio/(.*)$ {
proxy_pass http://127.0.0.1:4873/$1;
proxy_set_header Host $host:$server_port;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
```
For this case, `url_prefix` should set to `/verdaccio/`
> Note: There is a slash after the install path (`https://your-domain:port/verdaccio/`)!
### Overriding the public url
> Since `verdaccio@5.0.0`
The new `VERDACCIO_PUBLIC_URL` is intended to be used behind proxies, this variable will be used for:
- Used as base path to serve UI resources as (js, favicon, etc)
- Used on return metadata `dist` base path
- Ignores `host` and `X-Forwarded-Proto` headers
- If `url_prefix` is defined would be appened to the env variable.
```
VERDACCIO_PUBLIC_URL='https://somedomain.org';
url_prefix: '/my_prefix'
// url -> https://somedomain.org/my_prefix/
VERDACCIO_PUBLIC_URL='https://somedomain.org';
url_prefix: '/'
// url -> https://somedomain.org/
VERDACCIO_PUBLIC_URL='https://somedomain.org/first_prefix';
url_prefix: '/second_prefix'
// url -> https://somedomain.org/second_prefix/'
```
