question for snort flow established

[zhaojunling_20 <zhaojunling_2000 () 163 com>]

Dear All,


I have a little question, if I installed snort on my web server<ipaddress 10.2.11.2> which has only one ethernet 
interface and snort inspect the interface, does "flow with option established" work or not?


I have tested the below rule with ----http://10.2.11.2/test.php?user=Zango/Setup.exe, no alert arised.
alert tcp any any -> $HTTP_SERVERS $HTTP_PORTS (msg:"WEB-CLIENT Zango adware installation request"; 
content:"Zango/Setup.exe";flow: to_server,established; reference:url,www.ftc.gov/os/caselist/0523130/index.shtm; 
classtype:policy-violation; sid:10000019; rev:3;)
appreciate your help~


Junling Zhao

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