Wordfence falcon engine caching always results in 500 server error

Hi,\

Can you paste your htaccess code here after enabling falcon?

Thanks!

tim

Here you go.

#WFIPBLOCKS – Do not remove this line. Disable Web Caching in Wordfence to remove this data.
Order Deny,Allow
#Do not remove this line. Disable Web Caching in Wordfence to remove this data – WFIPBLOCKS
#WFCACHECODE – Do not remove this line. Disable Web Caching in Wordfence to remove this data.
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon application/json
<IfModule mod_headers.c>
Header append Vary User-Agent env=!dont-vary
</IfModule>
<IfModule mod_mime.c>
AddOutputFilter DEFLATE js css htm html xml
</IfModule>
</IfModule>
<IfModule mod_mime.c>
AddType text/html .html_gzip
AddEncoding gzip .html_gzip
AddType text/xml .xml_gzip
AddEncoding gzip .xml_gzip
</IfModule>
<IfModule mod_setenvif.c>
SetEnvIfNoCase Request_URI \.html_gzip$ no-gzip
SetEnvIfNoCase Request_URI \.xml_gzip$ no-gzip
</IfModule>
<IfModule mod_headers.c>
Header set Vary “Accept-Encoding, Cookie”
</IfModule>
<IfModule mod_rewrite.c>
#Prevents garbled chars in cached files if there is no default charset.
AddDefaultCharset utf-8

#Cache rules:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} on
RewriteRule .* – [E=WRDFNC_HTTPS:_https]
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteRule .* – [E=WRDFNC_ENC:_gzip]
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{HTTPS} off
RewriteCond %{QUERY_STRING} ^(?:\d+=\d+)?$
RewriteCond %{REQUEST_URI} (?:\/|\.html)$ [NC]

RewriteCond %{HTTP_COOKIE} !(comment_author|wp\-postpass|wf_logout|wordpress_logged_in|wptouch_switch_toggle|wpmp_switcher) [NC]

RewriteCond %{REQUEST_URI} \/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)(.*)$
RewriteCond “%{DOCUMENT_ROOT}/wp-content/wfcache/%{HTTP_HOST}_%1/%2~%3~%4~%5~%6_wfcache%{ENV:WRDFNC_HTTPS}.html%{ENV:WRDFNC_ENC}” -f
RewriteRule \/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)(.*)$ “/wp-content/wfcache/%{HTTP_HOST}_$1/$2~$3~$4~$5~$6_wfcache%{ENV:WRDFNC_HTTPS}.html%{ENV:WRDFNC_ENC}” [L]
</IfModule>
#Do not remove this line. Disable Web caching in Wordfence to remove this data – WFCACHECODE
# BEGIN W3TC Browser Cache
<IfModule mod_deflate.c>
<IfModule mod_headers.c>
Header append Vary User-Agent env=!dont-vary
</IfModule>
<IfModule mod_filter.c>
AddOutputFilterByType DEFLATE text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon application/json
<IfModule mod_mime.c>
# DEFLATE by extension
AddOutputFilter DEFLATE js css htm html xml
</IfModule>
</IfModule>
</IfModule>
# END W3TC Browser Cache
# BEGIN W3TC Page Cache core
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteRule .* – [E=W3TC_ENC:_gzip]
RewriteCond %{HTTP_COOKIE} w3tc_preview [NC]
RewriteRule .* – [E=W3TC_PREVIEW:_preview]
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{QUERY_STRING} =””
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{HTTP_COOKIE} !(comment_author|wp\-postpass|w3tc_logged_out|wordpress_logged_in|wptouch_switch_toggle) [NC]
RewriteCond “%{DOCUMENT_ROOT}/wp-content/cache/page_enhanced/%{HTTP_HOST}/%{REQUEST_URI}/_index%{ENV:W3TC_PREVIEW}.html%{ENV:W3TC_ENC}” -f
RewriteRule .* “/wp-content/cache/page_enhanced/%{HTTP_HOST}/%{REQUEST_URI}/_index%{ENV:W3TC_PREVIEW}.html%{ENV:W3TC_ENC}” [L]
</IfModule>
# END W3TC Page Cache core
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

Looks like you are trying to cache twice, once with falcon and once with w3tc. Two plugins with the same functionality never works right.
Try disabling w3tc caching and see if the issue is corrected. If it persists it might mean ours is the problem. Make sure and take out the w3tc code from htaccess before testing

Tim

Hmm weird, as I don’t even have W3tc installed anymore.
I had it installed in the past, then decided it’s better to use falcon as that plugin is installed anyway (Less plugins the better).

Guess I’ll take the code out and see what happens.

Yeah, there may even be a directory o0f cache files there that you have to remove. I can’t say for sure but it seems like that has caused problems in the past.

tim

Installed W3tc again, deleted it.
Deinstalled wordfence, installed it again.
Think I cleared all cache files properly.

Now the htaccess looks like this:

#WFIPBLOCKS – Do not remove this line. Disable Web Caching in Wordfence to remove this data.
Order Deny,Allow
#Do not remove this line. Disable Web Caching in Wordfence to remove this data – WFIPBLOCKS
#WFCACHECODE – Do not remove this line. Disable Web Caching in Wordfence to remove this data.
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/css text/x-component application/x-javascript application/javascript text/javascript text/x-js text/html text/richtext image/svg+xml text/plain text/xsd text/xsl text/xml image/x-icon application/json
<IfModule mod_headers.c>
Header append Vary User-Agent env=!dont-vary
</IfModule>
<IfModule mod_mime.c>
AddOutputFilter DEFLATE js css htm html xml
</IfModule>
</IfModule>
<IfModule mod_mime.c>
AddType text/html .html_gzip
AddEncoding gzip .html_gzip
AddType text/xml .xml_gzip
AddEncoding gzip .xml_gzip
</IfModule>
<IfModule mod_setenvif.c>
SetEnvIfNoCase Request_URI \.html_gzip$ no-gzip
SetEnvIfNoCase Request_URI \.xml_gzip$ no-gzip
</IfModule>
<IfModule mod_headers.c>
Header set Vary “Accept-Encoding, Cookie”
</IfModule>
<IfModule mod_rewrite.c>
#Prevents garbled chars in cached files if there is no default charset.
AddDefaultCharset utf-8

#Cache rules:
RewriteEngine On
RewriteBase /
RewriteCond %{HTTPS} on
RewriteRule .* – [E=WRDFNC_HTTPS:_https]
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteRule .* – [E=WRDFNC_ENC:_gzip]
RewriteCond %{REQUEST_METHOD} !=POST
RewriteCond %{HTTPS} off
RewriteCond %{QUERY_STRING} ^(?:\d+=\d+)?$
RewriteCond %{REQUEST_URI} (?:\/|\.html)$ [NC]

RewriteCond %{HTTP_COOKIE} !(comment_author|wp\-postpass|wf_logout|wordpress_logged_in|wptouch_switch_toggle|wpmp_switcher) [NC]

RewriteCond %{REQUEST_URI} \/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)(.*)$
RewriteCond “%{DOCUMENT_ROOT}/wp-content/wfcache/%{HTTP_HOST}_%1/%2~%3~%4~%5~%6_wfcache%{ENV:WRDFNC_HTTPS}.html%{ENV:WRDFNC_ENC}” -f
RewriteRule \/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)\/*([^\/]*)(.*)$ “/wp-content/wfcache/%{HTTP_HOST}_$1/$2~$3~$4~$5~$6_wfcache%{ENV:WRDFNC_HTTPS}.html%{ENV:WRDFNC_ENC}” [L]
</IfModule>
#Do not remove this line. Disable Web caching in Wordfence to remove this data – WFCACHECODE
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I still get the 500 server error when enabling falcon ??
Wondering what’s going on ??

yeah At this point, we really need server error logs to diagnose. Turn on falcon for 5 minutes and note the time. Ask your hosting provider to g8ive you error logs for your site for that time period. They could run something like cat error.log | grep sitename | grep 500 | grep time (substitute correct values for time and sitename, of course). Let me know when you get those.

tim