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why an http server sends only packets with ACK RST flag

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Hello,

I have found in traffic traces a strange phénomena that I can't explained. The traffic comes from the repository mawilab. Among this traffic I have a strange thing. There is an http server (216.118.180.205 ) which sends only TCP packets with the RSt ACK flag.

I wonder why its does such a thing. Why does it send these packets ? Here is a screenshot of this strange phenomena. It shows the traffic from and to the HTTP server. My question is why does it do such a thing. Is it an anomaly, a bug of the server, an attack ?...

alt text

Thaks in advance for any answer

asked 06 Feb '15, 05:57

district9's gravatar image

district9
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accept rate: 0%

The traffic comes from the repository mawilab.

What is the "repository mawilab"?

BTW: Are you sure you are seeing the whole traffic while capturing the frames? Where and how did you capture that traffic?

(09 Feb '15, 15:56) Kurt Knochner ♦

One Answer:

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Without a more detailed description of the origin of the capture file it's hard to tell what this is. It could be a TCP reset attack, although the information here is a bit limited.

answered 09 Feb '15, 04:01

Jaap's gravatar image

Jaap ♦
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accept rate: 14%