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<p class="MsoNormal">Trying to create a signature using http protocol with keywords http_header and http_uri but the signature does not match the packet<o:p></o:p></p>
<p class="MsoNormal">alert http any any -> any any (msg:"Test http headers"; content:"Host|3A| www.test1.url.com"; http_header; content:"page2"; http_uri; fast_pattern; classtype:bad-unknown; rev:10; sid:9902;)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But if I use protocol tcp the signature matches<o:p></o:p></p>
<p class="MsoNormal">alert tcp any any -> any $HTTP_PORTS (msg:"Test REJECT page2"; content:"Host|3A| www.test1.url.com"; content:"page2"; fast_pattern; classtype:bad-unknown; rev:10; sid:2;)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sample Packet<o:p></o:p></p>
<p class="MsoNormal">Raw packet data<o:p></o:p></p>
<p class="MsoNormal">Hypertext Transfer Protocol<o:p></o:p></p>
<p class="MsoNormal"> GET /page2 HTTP/1.1\r\n<o:p></o:p></p>
<p class="MsoNormal"> Host: www.test1.url.com\r\n<o:p></o:p></p>
<p class="MsoNormal"> Connection: close\r\n<o:p></o:p></p>
<p class="MsoNormal"> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4\r\n<o:p></o:p></p>
<p class="MsoNormal"> Accept: */*\r\n<o:p></o:p></p>
<p class="MsoNormal"> Accept-Language: en-us\r\n<o:p></o:p></p>
<p class="MsoNormal"> Accept-Encoding: gzip, deflate, compress\r\n<o:p></o:p></p>
<p class="MsoNormal"> \r\n<o:p></o:p></p>
<p class="MsoNormal"> [Full request URI: http://www.test1.url.com/page2]<o:p></o:p></p>
<p class="MsoNormal"> [HTTP request 1/1]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Would someone explain why the signature using the http protocol does not work<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Lucida Calligraphy"">Ena </span><o:p></o:p></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
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