Wordpress Multisite get an 502

[cyprus]

Hello last week I got ISPConfig to run after 2 weeks of hard work.
I resolved each task to get ISPcontig running on my server but the main point why I even thought about to switch my configuration is still not accomplished.

Before I start to describe the Problem here is my server config.
Debian Squeeze, Nginx , php-fpm, Postfix / Dovecot ,MySQL 5.5

Most stuff is fine ISPconfig seems to work like it should be. Postfix / Dovecot works as well.

I´ve uploaded a Flash Site to one of my webs and it works

I tried to move one of my Wordpress ms installation from an Apache environment, and this fails.
I know I can´t use the Apache .htaccess rules anymore and have to tell nginx what to do. I took the Nginx Config from the wordpress.org codex.
http://codex.wordpress.org/Nginx

The configuration is clear in most cases but there is one point which is not clear

# Upstream to abstract backend connection(s) for PHP.
upstream php {
server unix:/tmp/php-fpm.sock;
# server 127.0.0.1:9000;
}

I implemented it as described but if I call a site I get an 502 Error.

Folgender Fehler ist aufgetreten:

Dieser Server hat eine ungültige Antwort von einem Upstream-Server erhalten, auf den zugegriffen wurde, um die Anforderung zu erfüllen.

I get an invalid request from the Upstream Server.
And now I´m a littlebit lost. And need your inspiration to solve the problem.

Thank you in advance.
Cyprus

[till]

The nginx configuration for php is done by ispconfig, so you should not duplicate this with your manual configuration or nginx will fail. The guide you followed is for a complete nginx configuration for servers without a controlpanel thats uses different paths etc., if you use a controlpanel like ispconfig, then dont touch nginx.conf file or site configuration file. Instaed you just add the wordpress rules in the custom nginx directives field in ispconfig.

[cyprus]

Instaed you just add the wordpress rules in the custom nginx directives field in ispconfig.

I read about such field but where should this be?

Thank you for your reply

[till]

Options tab of the website settings.

[cyprus]

Okay thank you I found it.

But there are a few questions remaining.
1) Do you recommend to turn " Use Socket for PHP-FPM" on?
2) Do you agree that I only have to drop the rewrite rules for Nginx into the Nginx topic

# This order might seem weird - this is attempted to match last if rules below fail.
# http://wiki.nginx.org/HttpCoreModule
location / {
try_files $uri $uri/ /index.php?$args;
}

# Add trailing slash to */wp-admin requests.
rewrite /wp-admin$ $scheme://$host$uri/ permanent;

# Directives to send expires headers and turn off 404 error logging.
location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
expires 24h;
log_not_found off;
}

# Pass uploaded files to wp-includes/ms-files.php.
rewrite /files/$ /index.php last;

# For multisite: Use a caching plugin that creates symlinks to the correct subdirectory structure to get some performance gains.
set $cachetest "$document_root/wp-content/cache/ms-filemap/${host}${uri}";
if ($uri ~ /$) {
set $cachetest "";
}
if (-f $cachetest) {
# Rewrites the URI and stops rewrite processing so it doesn't start over and attempt to pass it to the next rule.
rewrite ^ /wp-content/cache/ms-filemap/${host}${uri} break;
}

if ($uri !~ wp-content/plugins) {
rewrite /files/(.+)$ /wp-includes/ms-files.php?file=$1 last;
}

# Uncomment one of the lines below for the appropriate caching plugin (if used).
#include global/wordpress-ms-subdir-wp-super-cache.conf;
# include global/wordpress-ms-subdir-w3-total-cache.conf;

# Rewrite multisite '.../wp-.*' and '.../*.php'.
if (!-e $request_filename) {
rewrite ^/[_0-9a-zA-Z-]+(/wp-.*) $1 last;
rewrite ^/[_0-9a-zA-Z-]+.*(/wp-admin/.*\.php)$ $1 last;
rewrite ^/[_0-9a-zA-Z-]+(/.*\.php)$ $1 last;
}

Thanx in advance
Cyprus

[cyprus]

So I deleted everything I´ve changed in the nginx.conf and orx.org vhost config and dropped the rewrite rule I posted above without the part for the caching plugin into nginx configuration in the ispconfig backend and the result is a 500 Error.
Not shure what to check next.