Blank DSM Login Screen when using DSM Reverse Proxy

[DaVoodoo]

Greetings.

As a new user, I have set up everything I wanted to with some excellent tutorials from mostly members here and I am 99% done. I am just being haunted by one thing:

I used @Rusty tutorials for Let's Encrypt + Docker = wildcard certs & Synology Reverse Proxy.

Sonarr, Radarr etc works fine using the reverse proxy. However, if I set up a reverse proxy to go to DSM is works fine for 1 or 2 times where I am able to get to the login screen. Thereafter if I try, it shows the DSM logo on the tab but the page is just white/blank?

I have seen other people posting on similar problems with Apache Proxy Server etc. but can't figure out how to fix it.

If you can shed some light, I will really appreciate it.

 

[Rusty]

Greetings.

As a new user, I have set up everything I wanted to with some excellent tutorials from mostly members here and I am 99% done. I am just being haunted by one thing:

I used @Rusty tutorials for Let's Encrypt + Docker = wildcard certs & Synology Reverse Proxy.

Sonarr, Radarr etc works fine using the reverse proxy. However, if I set up a reverse proxy to go to DSM is works fine for 1 or 2 times where I am able to get to the login screen. Thereafter if I try, it shows the DSM logo on the tab but the page is just white/blank?

I have seen other people posting on similar problems with Apache Proxy Server etc. but can't figure out how to fix it.

If you can shed some light, I will really appreciate it.

Probably not an RP issue.

 

[DaVoodoo]

@Rusty can you please have a look at the following thread and see if this shines any light on my issue:

Apache Proxy Server with Diskstation: blank DSM login screen

 

[Rusty]

log into your nas via ssh and go to /var/log/nginx/error and see if there are any errors that might point to a problem with this.

Also, if it works 1-2 times then it probably is not the RP that's the problem here. How is your DSM login configured via RP in the 1st place?

 

[Shadow]

Already tried reverse proxying to the http port (default 5000) of your DSM?

 

[DaVoodoo]

log into your nas via ssh and go to /var/log/nginx/error and see if there are any errors that might point to a problem with this.

Also, if it works 1-2 times then it probably is not the RP that's the problem here. How is your DSM login configured via RP in the 1st place?

I logged in with ssh and could get to /var/log/nginx but not further?

At Cloudflare DNS I made an Aname entry to my ddns address. My DSM login is configured with the inbuilt RP of Synology:

I also found this thread on the same issue: Accessing synology DSM behind nginx reverse proxy

 

[Rusty]

same problem when using http/5000 port?

 

[DaVoodoo]

same problem when using http/5000 port?

Yes, same issue.

 

[Rusty]

Developer view of the page? What does the console report?

Same problem with other browsers?

 

[DaVoodoo]

@Rusty I have sent you a PM with some reports from browsers. Thanks

-- post merged: 10. Jul 2021 --

@Rusty I have turned off Auto Minify in Cloudflare and it now seems to work. Thank you very much for all your patience with me.

EDIT: Still not 100% but I suspect that it is some or other setting on Cloudflare. Please still have a look at the logs I sent and let me know your thoughts.

 

[Rusty]

sorry for the late reply but if your domain is being proxied by CF and the logs are stating script blocking by then as well as 522 errors, then I guess your solution is in CF configurations. If it works atm, then you have found your solution.