[Snort-users] [Snort-sigs] sid: 2012647 How to understand user upload file to the server, or download

Y M snort at ...15979...
Tue Feb 4 04:19:00 EST 2014

This will largely depend on how you have your $HOME_NET and $EXTERNAL_NET configured in your snort.conf file. From the rule perspective, this will depend on:
 - Direction of your rule $HOME_NET -> $EXTERNAL_NET or $EXTERNAL_NET -> $HOME_NET
 - Since the below rule seems to be alerting on TCP, then you have to check the flow direction in the rule if there is any.
 - Whether the content match in the rule will satisfy the content pattern regardless of direction.
Date: Wed, 29 Jan 2014 16:57:51 +0400
From: malinkinsa at ...11827...
To: snort-sigs at lists.sourceforge.net
Subject: [Snort-sigs] sid: 2012647 How to understand user upload file to the	server, or download


I just recently started using snort.

I have a question about one rule, set out in the the message subject:)

Testing a rule, if I upload a file through the client to the server or the client takes dropboksa file from a server on my computer I get the following message:

[**] [1:2012647:3] ET POLICY Dropbox.com Offsite File Backup in Use [**]
[Classification: Potential Corporate Privacy Violation] [Priority: 1] 
01/29-22:52:30.221035 XXX.XXX.XXX.XXX:28152 ->
TCP TTL:41 TOS:0x0 ID:2084 IpLen:20 DgmLen:293 DF
***A**** Seq: 0xD0A65C80  Ack: 0x9A9A3FE7  Win: 0x3CB8  TcpLen: 20

But I want to somehow distinguish a download or upload information.

Maybe somebody did something similar.

Thank you!

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