# Kibana short URL not working behind reverse proxy

**URL:** <https://discuss.elastic.co/t/kibana-short-url-not-working-behind-reverse-proxy/237114>\
**Category:** Kibana\
**Created:** [June 15, 2020, 10:52am UTC](https://discuss.elastic.co/t/kibana-short-url-not-working-behind-reverse-proxy/237114 "2020-06-15T10:52:49Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![sandeepkanabar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sandeepkanabar/32/79399_2.png) [@sandeepkanabar](https://discuss.elastic.co/u/sandeepkanabar)\
**Post date:** [June 15, 2020, 10:52am UTC](https://discuss.elastic.co/t/kibana-short-url-not-working-behind-reverse-proxy/237114/1 "2020-06-15T10:52:49Z")

</div>

I’ve a Kibana running on port `5601`. And we have set-up `Nginx reverse proxy` on port `80` that uses `RO` credentials and sends requests to `kibana` on port `5601`. This is so that RO (read-only) customers can access dashboard without having the need to enter password

This if I launch Kibana like `http://kibana_url:80` or `http://kibana_url` then it goes via the Nginx and I won’t need to enter password.

If I launch Kibana like `http://kibana_url:5601`, then it takes me to login page and I need to enter password.

When I access Kibana using the 5601 port and create a shortened URL and share it, the shared shortened URL works fine when it is launched.

But when I access Kibana using `http://kibana_url` which is via Nginx and create a shortened URL and share it, the shared URL returns page not found.

 ![Screenshot 2020-06-15 at 3.02.06 PM](https://us1.discourse-cdn.com/elastic/original/3X/1/6/167466f16b983b502c046b2c553ca388d4200887.png)

Snippet of `nginx` config file:

```auto
server {
        listen 80 default_server;
        listen [::]:80 default_server;
        server_name node00.foo.bar.com;
        #root /usr/share/nginx/html;
 
        # Load configuration files for the default server block.
        #include /etc/nginx/default.d/*.conf;
 
        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_cookie_path / /;
                #proxy_set_header Cookie $http_cookie;
                proxy_set_header Authorization "Basic foobarfoobarfoobarfoobarfoobarfoob==";
                proxy_pass http://node00.foo.bar.com:5601;
        }
 
        error_page 404 /404.html;
            location = /40x.html {
        }
 
        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

```

Except for the short url, everything else works fine when accessed via Nginx Reverse Proxy i.e. `http://kibana_url`.

Also, here's a snippet of `Kibana.log` when this error occurs:

```auto
{"type":"response","@timestamp":"2020-06-15T09:42:14Z","tags":[],"pid":1950,"method":"get","statusCode":302,"req":{"url":"/goto/abracadabraabracadabraabracadbra","method":"get","headers":{"host":"foo.bar.com","x-real-ip":"A.A.A.A","x-forwarded-for":"A.A.A.A","connection":"close","accept":"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8","upgrade-insecure-requests":"1","user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X F_F_F) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15","accept-language":"en-us","accept-encoding":"gzip, deflate"},"remoteAddress":"B.B.B.B","userAgent":"B.B.B.B"},"res":{"statusCode":302,"responseTime":23,"contentLength":9},"message":"GET /goto/abracadabraabracadabraabracadbra 302 23ms - 9.0B"}
{"type":"response","@timestamp":"2020-06-15T09:42:15Z","tags":[],"pid":1950,"method":"get","statusCode":404,"req":{"url":"/nginx-logo.png","method":"get","headers":{"host":"foo.bar.com","x-real-ip":"A.A.A.A","x-forwarded-for":"A.A.A.A","connection":"close","accept":"image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5","user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X F_F_F) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15","accept-language":"en-us","referer":"http://foo.bar.com/goto/abracadabraabracadabraabracadbra","accept-encoding":"gzip, deflate"},"remoteAddress":"B.B.B.B","userAgent":"B.B.B.B","referer":"http://foo.bar.com/goto/abracadabraabracadabraabracadbra"},"res":{"statusCode":404,"responseTime":52,"contentLength":9},"message":"GET /nginx-logo.png 404 52ms - 9.0B"}
{"type":"response","@timestamp":"2020-06-15T09:42:15Z","tags":[],"pid":1950,"method":"get","statusCode":404,"req":{"url":"/poweredby.png","method":"get","headers":{"host":"foo.bar.com","x-real-ip":"A.A.A.A","x-forwarded-for":"A.A.A.A","connection":"close","accept":"image/png,image/svg+xml,image/*;q=0.8,video/*;q=0.8,*/*;q=0.5","user-agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X F_F_F) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15","accept-language":"en-us","referer":"http://foo.bar.com/goto/abracadabraabracadabraabracadbra","accept-encoding":"gzip, deflate"},"remoteAddress":"B.B.B.B","userAgent":"B.B.B.B","referer":"http://foo.bar.com/goto/abracadabraabracadabraabracadbra"},"res":{"statusCode":404,"responseTime":52,"contentLength":9},"message":"GET /poweredby.png 404 52ms - 9.0B"}

```

It seems that ES returns `302` but then `Nginx` is unable to redirect.

ELK Stack Version: 6.8.6.

Will appreciate some pointers.

-Sandeep

---

<div class="post-metadata">

**Author:** ![sandeepkanabar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sandeepkanabar/32/79399_2.png) [@sandeepkanabar](https://discuss.elastic.co/u/sandeepkanabar)\
**Post date:** [June 19, 2020, 2:49pm UTC](https://discuss.elastic.co/t/kibana-short-url-not-working-behind-reverse-proxy/237114/3 "2020-06-19T14:49:47Z")

</div>

Was able to fix this issue by adding `proxy_buffers` to `nginx.conf` file.

In `Nginx logs`, I could see the following error:

```auto
2020/06/15 08:37:32 [error] 2213#0: *111259 upstream sent too big header while reading response header from upstream, client: 1.1.1.1, server: node00.foo.bar.com, request: "GET /goto/abracadabraabracadabraabracadabr HTTP/1.1", upstream: "http://2.2.2.2:5601/goto/abracadabraabracadabraabracadabr", host: "node00.foo.bar.com"

```

I also found that the **short url is working** for a small visualization but not for a huge dashboard. This correlates with what the error says above that the data chunk is huge.

So, following this [SO link](https://stackoverflow.com/a/27551259), I added the following to my `nginx.conf` under `location` block:

```auto
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;

```

Restarted Nginx and all works fine now. The goto link works.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 17, 2020, 3:03pm UTC](https://discuss.elastic.co/t/kibana-short-url-not-working-behind-reverse-proxy/237114/4 "2020-07-17T15:03:06Z")

</div>

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