Thread: Block useragent with htaccess

I am trying to block this agent with htaccess and need help with the code.
so far I have tried this but its not working ,
Here is the original "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)"
and this is what I have tried
RewriteCond %{HTTP_USER_AGENT} ^Mozilla/4.0\ (compatible;\ MSIE\ 6.0;\ Windows\ NT\ 5.1;\ SV1)*$ [NC,OR]

any help would be appreciated

give this a shot

Code:

RewriteCond %{HTTP_USER_AGENT} ^Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) [OR] 
RewriteCond %{HTTP_USER_AGENT} ^Zeus 
RewriteRule ^.* - [F,L]

the \ back-slashes has been removed by the forum code...

Thanks for that louie worked fine
background to this was I was receiving a few hundred requests a day from multiple ip s with this usur agent not sure what was going on so I decided to kick them out the requests came every three hours on the half hour .
with in 3 mins of banning this user agent I had over 80 403 , and then 3 requests from different IP s using a similer user agent which I traced back to web sense ?