Snort mailing list archives

Re: Anyone else seeing lots of 129 20 this am?


From: "Michael Steele" <michaels () winsnort com>
Date: Fri, 30 Aug 2019 14:12:00 -0400

I noticed that too on the last Snort update. Getting a LOT more alerts. I also updated the rules at the same time and 
never went back to the old rules to see if that was where the change came in? 

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-----Original Message-----
From: Snort-users <snort-users-bounces () lists snort org> On Behalf Of James Lay via Snort-users
Sent: Friday, August 30, 2019 11:26 AM
To: Joel Esler (jesler) <jesler () cisco com>
Cc: Snort <snort-users () lists snort org>
Subject: Re: [Snort-users] Anyone else seeing lots of 129 20 this am?

Something as in snort ;)  Same traffic, a LOT more alerts right after updates.

On 2019-08-30 09:23, Joel Esler (jesler) wrote:
When you say "something changed", do you mean "Snort" changed.  Or 
"attacker behavior" may be changing?

On Aug 30, 2019, at 8:13 AM, James Lay via Snort-users 
<snort-users () lists snort org> wrote:

Yea something changed....I run ssh on a non-standard port and now I'm 
seeing:

[120:18:3] (http_inspect) PROTOCOL-OTHER HTTP server response before 
client request

after updating rules this AM:

Aug 30 01:10:22 snort[31692]: Decoding Ethernet Aug 30 01:17:53 
snort[31692]: [120:18:3] (http_inspect) PROTOCOL-OTHER HTTP server 
response before client request

that http_inspect hit rule is the first time I've seen that in my 
logs....ever 😉

James

On Fri, 2019-08-30 at 06:05 -0600, James Lay via Snort-users wrote:

Seeing massive amounts of [129:20:1] TCP session without 3-way 
handshake this morning....seems to be firing off on RST packets.

James

<Screenshot from 2019-08-30 06-05-03.png>

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