Haproxy - Cannot setup the most basic proxy - port

Question

Please, can somebody look at this config?
global
log stdout format raw local0 debug
stats timeout 30s
defaults
log global
mode http
option httplog
option dontlognull
timeout connect 50000
timeout client 50000
timeout server 50000
frontend app
bind *:15080
default_backend myback
backend myback
server site google.com:80 check
Why is this not working? If I try to visit 127.0.0.1:15080 it takes some time and then the url in a browser changes to www.google.com:16080 which obviously doesn't take you anywhere. The browser says: "This site can’t be reached - ERR_CONNECTION_TIMED_OUT".
So why doesn't it proxy to port 80 as one would expect?
The log entry does not tell much:
127.0.0.1:50871 [01/Jul/2019:14:39:45.879] app myback/site 0/0/20/84/104 301 681 - - ---- 2/2/0/0/0 0/0 "GET / HTTP/1.1"
Haproxy version:
HA-Proxy version 2.0.0-4fb65f-8 2019/06/19 - https://haproxy.org/
EDIT:
I somehow solved the problem by trial & error..

Answer 1

Actually, HAProxy is working as expected and proxying your request to google. Google, however, sees that the host header is 'Host: 127.0.0.1:15080', and responds with a 301 redirect to www.google.com:15080. You can see this without setting up HAProxy by doing:
$ curl -I -H 'Host: 127.0.0.1:15080' google.com
HTTP/1.1 301 Moved Permanently
Location: http://www.google.com:15080/
Content-Type: text/html; charset=UTF-8
Date: Mon, 01 Jul 2019 14:26:09 GMT
Expires: Wed, 31 Jul 2019 14:26:09 GMT
Cache-Control: public, max-age=2592000
Server: gws
Content-Length: 225
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
If you want to set up a very basic proxy to google, you need to make sure your host header matches and that you are sending requests via https.
backend myback
http-request set-header Host www.google.com
server site google.com:443 ssl verify none check