[Snort-sigs] Can Snort detect a download file from internet?

Hào Tài haotai1803 at gmail.com
Sun May 20 02:23:13 EDT 2018

Hello everyone,

I am a newbie about Snort. I try to write the snort rule to catch a
download JPG file from internet. Here is my rule:

>> alert tcp any any <> $HOME_NET any (msg:"JPEG"; content:"|FF D8 FF E0|";

But it does not work. Do I missing somethings or do I need to config
somethings for Snort?
Can everybody help me to find out the problem? Thank you.

Tai Ly
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