# Erro 502 Bad Gateway help **URL:** \ **Category:** NGINX\ **Created:** [July 2, 2016, 8:30am UTC](https://www.ruby-forum.com/t/erro-502-bad-gateway-help/244886 "2016-07-02T08:30:16Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Post date:** [July 2, 2016, 8:30am UTC](https://www.ruby-forum.com/t/erro-502-bad-gateway-help/244886/1 "2016-07-02T08:30:16Z")
Hi I’m setting up a nginx as a reverse proxy but to try to see a site with drupal locally that have shown me 502 Bad Gateway error. this gets me in the logs. 016/07/02 00:51:57 [error] 18120#0: \*61 upstream sent unsupported FastCGI protocol version: 72 while reading response header from upstream, client: 127.0.0.1, server: localhost, request: “GET / HTTP/1.1”, upstream: “fastcgi://127.0.0.1:8080”, host: " localhost" I can not get him out of there I find that causes this error. the server operating system is a gentoo. I show my vhost server { listen 80; server\_name localhost; ``` access_log /var/log/nginx/localhost_access_log main; error_log /var/log/nginx/localhost_error_log info; root /var/www/site/prueva/www/; location / { index index.html index.htm index.php; autoindex on; autoindex_exact_size off; autoindex_localtime on; } location ~ \.php$ { # Test for non-existent scripts or throw a 404 ``` error # Without this line, nginx will blindly send any request ending in .php to php-fpm try\_files $uri =404; include /etc/nginx/fastcgi.conf; fastcgi\_pass 127.0.0.1:8080; ## Make sure the socket corresponds with PHP-FPM conf file } } ---
**Author:** ![yair\_avendaSSo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/85e7bf/32.png) [@yair\_avendaSSo](https://www.ruby-forum.com/u/yair_avendaSSo)\ **Post date:** [July 2, 2016, 9:05am UTC](https://www.ruby-forum.com/t/erro-502-bad-gateway-help/244886/2 "2016-07-02T09:05:19Z")
Hello, Where did you PHP install? You can edit /path/to/php\_dir/etc/php-fpm.conf,or sometimes there will be a dir called ‘www.conf.d’,if it is,please change in the directory,and edit www.conf which is in the www.conf.d. You will find a option called ‘listen’ in the configuration file below,make sure the option’s content is ‘127.0.0.1:8080’,if not,you can edit it as ‘127.0.0.1:8080’.You can also edit the nginx configuration file,change the option ‘fastcgi\_pass’. But I recommend use socket to connect php-fastcgi,it is faster.To do this,just change the php-fpm.conf or www.conf likes follow: [www] … user=www group=www … listen = /dev/shm/php-cgi.sock listen.owner = www listen.group = www listen.mode = 0660 '…'just stands for something omitted. And then change the ‘fastcgi\_pass’ option to ‘unix:/dev/shm/php-cgi.sock’,restart nginx and PHP,all done! P.S:My mother tongue isn’t English,if there is something you couldn’t understand,please let my konw,thanks! 2016-07-02 14:21 GMT+08:00 yair avendaño [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): ---
**Author:** ![yair\_avendaSSo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/85e7bf/32.png) [@yair\_avendaSSo](https://www.ruby-forum.com/u/yair_avendaSSo)\ **Post date:** [July 2, 2016, 9:25am UTC](https://www.ruby-forum.com/t/erro-502-bad-gateway-help/244886/3 "2016-07-02T09:25:46Z")
On Sat, Jul 02, 2016 at 06:21:38AM +0000, yair avendao wrote: Hi there, > Hi I’m setting up a nginx as a reverse proxy but to try to see a site with > drupal locally that have shown me 502 Bad Gateway error. “drupal” is possibly served by a http server, not a fastcgi server. > this gets me in the logs. > > 016/07/02 00:51:57 [error] 18120#0: \*61 upstream sent unsupported FastCGI > protocol version: 72 while reading response header from upstream, client: > 127.0.0.1, server: localhost, request: “GET / HTTP/1.1”, upstream: > “fastcgi://127.0.0.1:8080”, host: " localhost" If you make a bad http request to a http server, it will likely return something that starts with “HTTP”. The decimal value of ascii “H” is “72”; a fastcgi client may expect the first octet to refer to the fastcgi protocol version. So your error message hints that your upstream is not a fastcgi server but is a http server. Which in turn suggests that the fix is: > ``` > location ~ \.php$ { > # Test for non-existent scripts or throw a 404 error > # Without this line, nginx will blindly send any request > > ``` ending in .php to php-fpm > ``` > try_files $uri =404; > include /etc/nginx/fastcgi.conf; > > ``` - delete those two > ``` > fastcgi_pass 127.0.0.1:8080; ## Make sure the socket > > ``` corresponds with PHP-FPM conf file - replace that with ---
**Author:** ![yair\_avendaSSo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/85e7bf/32.png) [@yair\_avendaSSo](https://www.ruby-forum.com/u/yair_avendaSSo)\ **Post date:** [July 3, 2016, 3:03am UTC](https://www.ruby-forum.com/t/erro-502-bad-gateway-help/244886/4 "2016-07-03T03:03:04Z")
Hi. You must use fastcgi\_pass if you use fastcgi server as backend e.g. php-fpm. If you use apache as backend you must use proxy\_pass. 2 июля 2016 г. 10:25 пользователь “Francis D.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) написал: On Sat, Jul 02, 2016 at 06:21:38AM +0000, yair avendaño wrote: Hi there, > Hi I’m setting up a nginx as a reverse proxy but to try to see a site > with drupal locally that have shown me 502 Bad Gateway error. “drupal” is possibly served by a http server, not a fastcgi server. > this gets me in the logs. > > 016/07/02 00:51:57 [error] 18120#0: \*61 upstream sent unsupported FastCGI > protocol version: 72 while reading response header from upstream, > client: > 127.0.0.1, server: localhost, request: “GET / HTTP/1.1”, upstream: > “fastcgi://127.0.0.1:8080”, host: " localhost" If you make a bad http request to a http server, it will likely return something that starts with “HTTP”. The decimal value of ascii “H” is “72”; a fastcgi client may expect the first octet to refer to the fastcgi protocol version. So your error message hints that your upstream is not a fastcgi server but is a http server. Which in turn suggests that the fix is: > ``` > location ~ \.php$ { > # Test for non-existent scripts or throw a 404 > > ``` error > ``` > # Without this line, nginx will blindly send any > > ``` request ending in .php to php-fpm > ``` > try_files $uri =404; > include /etc/nginx/fastcgi.conf; > > ``` - delete those two > ``` > fastcgi_pass 127.0.0.1:8080; ## Make sure the > > ``` socket corresponds with PHP-FPM conf file - replace that with – Francis D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)