Re: Comcast is using Sandvine to manage P2P Connections

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Re: Comcast is using Sandvine to manage P2P Connections

said by Anonymous Coward :

Has anyone tried configuring their firewall to block incoming RST packets?

Yes, I tried this with linux iptables, and got really excited when it seemed to thwart the problem. But then I realized that the connections were dead, but they simply weren't being removed from the active list.

I believe this means that the RST is sent both ways. The response to an RST is not a FIN so the TCP/IP stack doesn't know the connection has been dropped.

Good thinking, though.

said by no oper :

I also noticed, that bit 6 of the IP TOS field was set on all these reset packets.

I hadn't noticed. They could have been set, or not. Are you directly connected? -- or could your router be adding that bit for use on the LAN?
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permalink · 2007-07-22 20:39:54 · Print ·

no oper @comcast.net	Re: Comcast is using Sandvine to manage P2P Connections said by funchords : I hadn't noticed. They could have been set, or not. Are you directly connected? -- or could your router be adding that bit for use on the LAN? I'm not directly connected, there's a router on the way, but this bit is set only on the reset packets I'm receiving on the bittorrent connections and nowhere else.
	permalink · 2007-07-22 22:08:15 ·

koitsu Premium join:2002-07-16 Mountain View, CA	said by funchords : I believe this means that the RST is sent both ways. The response to an RST is not a FIN so the TCP/IP stack doesn't know the connection has been dropped. Correct . See the below stateful diagram (PDF): »www.cse.iitb.ac.in/perfnet/cs456···diag.pdf -- Making life hard for others since 1977. I speak for myself and not my employer/affiliates of my employer.
	permalink · 2007-07-23 10:36:56 · Print ·

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