I was able to duplicate and solve the problem on a test site. The Google Analytics UTM string/link is being blocked by a combination of 3 security filters.
The 3 security filters that are causing the block/403 error.
RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=http:// [NC,OR] RewriteCond %{QUERY_STRING} http\: [NC,OR] RewriteCond %{QUERY_STRING} https\: [NC,OR]
1. Copy the modified (3 security filters have been commented out with pound signs) BPS Query String Exploits code below to this BPS Root Custom Code text box: CUSTOM CODE BPSQSE BPS QUERY STRING EXPLOITS: Modify Query String Exploit code here
# BEGIN BPSQSE BPS QUERY STRING EXPLOITS # The libwww-perl User Agent is forbidden - Many bad bots use libwww-perl modules, but some good bots use it too. # Good sites such as W3C use it for their W3C-LinkChecker. # Add or remove user agents temporarily or permanently from the first User Agent filter below. # If you want a list of bad bots / User Agents to block then scroll to the end of this file. RewriteCond %{HTTP_USER_AGENT} (havij|libwww-perl|wget|python|nikto|curl|scan|java|winhttp|clshttp|loader) [NC,OR] RewriteCond %{HTTP_USER_AGENT} (%0A|%0D|%27|%3C|%3E|%00) [NC,OR] RewriteCond %{HTTP_USER_AGENT} (;|<|>|'|"|\)|\(|%0A|%0D|%22|%27|%28|%3C|%3E|%00).*(libwww-perl|wget|python|nikto|curl|scan|java|winhttp|HTTrack|clshttp|archiver|loader|email|harvest|extract|grab|miner) [NC,OR] RewriteCond %{THE_REQUEST} (\?|\*|%2a)+(%20+|\\s+|%20+\\s+|\\s+%20+|\\s+%20+\\s+)HTTP(:/|/) [NC,OR] RewriteCond %{THE_REQUEST} etc/passwd [NC,OR] RewriteCond %{THE_REQUEST} cgi-bin [NC,OR] RewriteCond %{THE_REQUEST} (%0A|%0D|\\r|\\n) [NC,OR] RewriteCond %{REQUEST_URI} owssvr\.dll [NC,OR] RewriteCond %{HTTP_REFERER} (%0A|%0D|%27|%3C|%3E|%00) [NC,OR] RewriteCond %{HTTP_REFERER} \.opendirviewer\. [NC,OR] RewriteCond %{HTTP_REFERER} users\.skynet\.be.* [NC,OR] #RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=http:// [NC,OR] RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=(\.\.//?)+ [NC,OR] RewriteCond %{QUERY_STRING} [a-zA-Z0-9_]=/([a-z0-9_.]//?)+ [NC,OR] RewriteCond %{QUERY_STRING} \=PHP[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12} [NC,OR] RewriteCond %{QUERY_STRING} (\.\./|%2e%2e%2f|%2e%2e/|\.\.%2f|%2e\.%2f|%2e\./|\.%2e%2f|\.%2e/) [NC,OR] RewriteCond %{QUERY_STRING} ftp\: [NC,OR] #RewriteCond %{QUERY_STRING} http\: [NC,OR] #RewriteCond %{QUERY_STRING} https\: [NC,OR] RewriteCond %{QUERY_STRING} \=\|w\| [NC,OR] RewriteCond %{QUERY_STRING} ^(.*)/self/(.*)$ [NC,OR] RewriteCond %{QUERY_STRING} ^(.*)cPath=http://(.*)$ [NC,OR] RewriteCond %{QUERY_STRING} (\<|%3C).*script.*(\>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (<|%3C)([^s]*s)+cript.*(>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (\<|%3C).*embed.*(\>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (<|%3C)([^e]*e)+mbed.*(>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (\<|%3C).*object.*(\>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (<|%3C)([^o]*o)+bject.*(>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (\<|%3C).*iframe.*(\>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} (<|%3C)([^i]*i)+frame.*(>|%3E) [NC,OR] RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [NC,OR] RewriteCond %{QUERY_STRING} base64_(en|de)code[^(]*\([^)]*\) [NC,OR] RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR] RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2}) [OR] RewriteCond %{QUERY_STRING} ^.*(\(|\)|<|>|%3c|%3e).* [NC,OR] RewriteCond %{QUERY_STRING} ^.*(\x00|\x04|\x08|\x0d|\x1b|\x20|\x3c|\x3e|\x7f).* [NC,OR] RewriteCond %{QUERY_STRING} (NULL|OUTFILE|LOAD_FILE) [OR] RewriteCond %{QUERY_STRING} (\.{1,}/)+(motd|etc|bin) [NC,OR] RewriteCond %{QUERY_STRING} (localhost|loopback|127\.0\.0\.1) [NC,OR] RewriteCond %{QUERY_STRING} (<|>|'|%0A|%0D|%27|%3C|%3E|%00) [NC,OR] RewriteCond %{QUERY_STRING} concat[^\(]*\( [NC,OR] RewriteCond %{QUERY_STRING} union([^s]*s)+elect [NC,OR] RewriteCond %{QUERY_STRING} union([^a]*a)+ll([^s]*s)+elect [NC,OR] RewriteCond %{QUERY_STRING} \-[sdcr].*(allow_url_include|allow_url_fopen|safe_mode|disable_functions|auto_prepend_file) [NC,OR] RewriteCond %{QUERY_STRING} (;|<|>|'|"|\)|%0A|%0D|%22|%27|%3C|%3E|%00).*(/\*|union|select|insert|drop|delete|update|cast|create|char|convert|alter|declare|order|script|set|md5|benchmark|encode) [NC,OR] RewriteCond %{QUERY_STRING} (sp_executesql) [NC] RewriteRule ^(.*)$ - [F,L] # END BPSQSE BPS QUERY STRING EXPLOITS
2. Click the Save Root Custom Code button.
3. Go to the BPS Security Modes page, click the Create secure.htaccess File AutoMagic button and activate Root folder BulletProof Mode.