Mitigating IP spoofing against Tor
blog.torproject.org
Mitigating IP spoofing against Tor
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Re: Mitigating IP spoofing against Tor
#2The article here is basically PR from the Tor project. I suspect most reader here would find this relatively high-level technical analysis of the attack more interesting:
Re: Mitigating IP spoofing against Tor
#3I'm curious how they were able to locate the origin of the spoofed packets (?)
Re: Mitigating IP spoofing against Tor
#4The article here is basically PR from the Tor project. I suspect most reader here would find this relatively high-level technical analysis of the attack more interesting: https://delroth.net/posts/spoofed-mass-scan-abuse/
Discussed on HN when it came out.
Re: Mitigating IP spoofing against Tor
#5I'm curious how they were able to locate the origin of the spoofed packets (?)
The basic idea is:
a) find a cooperative receiver of the spoofed packets
b) log/mirror packets on inbound packets at their border routers to determine which peer the packets are coming from
c) ask that peer to do the same thing etc.
You can speed things up if the destination address of the spoofed packets is in a /24 that you can afford to do disruptive experiments with; and you have a wide network with extensive peering. In that case, advertise that /24 at all your locations and to all your peers. When you get traffic, if it's from a single source, you may only need to work with one peer to find the true origin.
Re: Mitigating IP spoofing against Tor
#6The article here is basically PR from the Tor project. I suspect most reader here would find this relatively high-level technical analysis of the attack more interesting: https://delroth.net/posts/spoofed-mass-scan-abuse/
This analysis is discussed and linked in the article.
Re: Mitigating IP spoofing against Tor
#7[deleted]