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Issue with NGINX and proxy: HTTP/1.1 505 HTTP Version not supported

Willy Gardiol
March 06, 2020 03:30AM
Hi all!
first time poster here so please excuse my manners and correct me where
i am wrong.

I use NGINX 1.16.1 on Gentoo as reverse proxy server to expose some
services to an external web site.

I am exposing many things but one is giving me headaches.

I am trying to expose the web UI of an HP network printer.

I have this in my nginx.conf (trimming lines to the ones relevant):
server {
listen 80;
access_log /var/log/nginx/localhost.access_log main;
error_log /var/log/nginx/localhost.error_log debug;

location /printer/ {
proxy_pass http://192.168.1.XX/;
}
}

I can access the printer from the proxy server, no problems, with:
curl http://192.168.1.XX

But if i try, on the same proxy server this:
curl http://127.0.0.1/printer/

I get the error:
2020/03/06 08:42:02 [debug] 12870#0: *2 connect to 192.168.1.XX:80,
fd:11 #3
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream connect: -2
2020/03/06 08:42:02 [debug] 12870#0: *2 http finalize request: -4,
"/printer/?" a:1, c:2
[snip]
2020/03/06 08:42:02 [debug] 12870#0: *2 http run request: "/printer/?"
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream check client,
write event:1, "/printer/"
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream request:
"/printer/?"
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream send request
handler
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream send request
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream send request body
[snip]
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream request:
"/printer/?"
2020/03/06 08:42:02 [debug] 12870#0: *2 http upstream process header
[snip]
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy status 505 "505 HTTP
Version not supported"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header:
"X-Content-Type-Options: no-sniff"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header:
"Cache-Control: no-cache, no-store, must-revalidate"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header: "Server:
gSOAP/2.7"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header:
"Content-Length: 0"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header: "Connection:
close"
2020/03/06 08:42:02 [debug] 12870#0: *2 http proxy header done
2020/03/06 08:42:02 [debug] 12870#0: *2 HTTP/1.1 505 HTTP Version not
supported^M

So my guess NGINX is doing something which the web printer does not
like...

What could i try or do?

thank you for your time and response.





--
Willy Gardiol
willy@gardiol.org
www.gardiol.org
www.trackaway.org -> Track YOUR way the way you want!
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Subject Author Posted

Issue with NGINX and proxy: HTTP/1.1 505 HTTP Version not supported

Willy Gardiol March 06, 2020 03:30AM

Re: Issue with NGINX and proxy: HTTP/1.1 505 HTTP Version not supported

Moshe Katz March 06, 2020 01:16PM



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