FTP Snort rule

[vijay saravanan <vjysaravan_88 () yahoo com>]

Hi All,

I am new to snort, Here is the rule written to detect connection request to FTP server and response from the FTP server.

alert tcp any any <> 192.168.0.147 21 (msg: "FTP access";sid:10000002;rev:1;)


The snort alerts all the connection attempt from external hosts to FTP Server but it is not producing the alert for 
response sent by FTP server.

For example :-

I could see the packet captured from 192.168.0.125 to 192.168.0.147:21 for "USER root"

But the response by the FTP server 192.168.0.147:21 to 192.168.0.125 is not captured.

We changed the rule to :-

alert tcp 192.168.0.147 21 -> any any (msg: "FTP access";sid:10000002;rev:1;). But still it doesn't work.

Please assist.Let me know if you need additional information.

Thanks,
Vijay

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