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5 Facts Proves CloudFlare blocks at least 80% legitimate traffic including SA popular site

I was  very surprise to see South Africa popular Tech site myBroadband is using CloudFlare which is poorly blacklisting legitimate traffic.  I always trust myBroadband  is well informed with what is going on the IP. So many time CloudFlare  deny me access to so many site, is  worse on the mobile devices.  I am no longer visiting site using CloudFlare . There are more people will second me on this issue, Captcha is irritating and wasting time.  

CloudFlare blogged that 94% of the requests it sees from Tor are "malicious." We find that unlikely, and we've asked CloudFlare to provide justification to back up this claim. We suspect this figure is based on a flawed methodology by which CloudFlare labels all traffic from an IP address that has ever sent spam as "malicious." Tor IP addresses are conduits for millions of people who are then blocked from reaching websites under CloudFlare's system.

Tor project started hear from CloudFlare's explanation of how they arrived at the 94% figure and why they choose to block so much legitimate traffic and Tor traffic. While we wait to hear from CloudFlare, here's what we know:

1) CloudFlare uses an IP reputation system to assign scores to IP addresses that generate malicious traffic. In their blog post, they mentioned obtaining data from Project Honey Pot, in addition to their own systems. Project Honey Pot has an IP reputation system that causes IP addresses to be labeled as "malicious" if they ever send spam to a select set of diagnostic machines that are not normally in use. CloudFlare has not described the nature of the IP reputation systems they use in any detail.

2) External research has found that CloudFlare blocks at least 80% of Tor IP addresses, and this number has been steadily increasing over time.

3) That same study found that it typically took 30 days for an event to happen that caused a Tor IP address to acquire a bad reputation and become blocked, but once it happens, innocent users continued to be punished for it for the duration of the study.

4) That study also showed a disturbing increase over time in how many IP addresses CloudFlare blocked without removal. CloudFlare's approach to blocking abusive traffic is incurring a large amount of false positives in the form of impeding normal traffic, thereby damaging the experience of many innocent Tor and non-Tor Internet users, as well as impacting the revenue streams of CloudFlare's own customers by causing frustrated or blocked users to go elsewhere.

5) A report by CloudFlare competitor Akamai found that the percentage of legitimate e-commerce traffic originating from Tor IP addresses is nearly identical to that originating from the Internet at large. (Specifically, Akamai found that the "conversion rate" of Tor IP addresses clicking on ads and performing commercial activity was "virtually equal" to that of non-Tor IP addresses).

CloudFlare disagrees with our use of the word "block" when describing its treatment of Tor traffic, but that's exactly what their system ultimately does in many cases. Users are either blocked outright with CAPTCHA server failure messages, or prevented from reaching websites with a long (and sometimes endless) loop of CAPTCHAs, many of which require the user to understand English in order to solve correctly. For users in developing nations who pay for Internet service by the minute, the problem is even worse as the CAPTCHAs load slowly and users may have to solve dozens each day with no guarantee of reaching a particular site. Rather than waste their limited Internet time, such users will either navigate away, or choose not to use Tor and put themselves at risk.

Also see our new fact sheet about CloudFlare and Tor:
Khabza Mkhize

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