I'm using Cloudflare flexible SSL for a website I made, and after investigating certificate properties, I realized different authentication mechanisms are being used. I know I already saw ChaCha encryption in action on Chrome for desktop as well, and I remember Google used it for their sites as well. Now, I'm not saying that in real life, when it comes to security, AES is better than ChaCha, I'm just curious. The new cipher suites we have added include a new symmetric cipher used for the encryption of data (based on the ChaCha20 and Poly1305 algorithms). So, encryption for mobile browsers isn't asymmetric, but still, as you can see in my Android screenshot, Chrome says that ECDHE_RSA is being used as key exchange mechanism. Not the answer you're looking for?Browse other questions tagged https security authentication cloudflare or ask your own question. Feeling pressured to publish thesis results by advisor I don't want to work with anymore. Spamhaus is responsible for a number of very widely used anti-spam DNS-based Blocklists (DNSBLs) and Whitelists (DNSWLs). In October, 2011, Spamhaus identified CyberBunker as providing hosting for spammers and contacted their upstream provider, A2B, asking that service be cancelled. A little over a week ago a questionable internet hosting provider in The Netherlands called Cyberbunker took umbrage with SpamHaus, an non-profit organization that was founded in 1998 to take on spammers and the internet hosts who profit from their activities. Cyberbunker caters to customers who are unwanted by or afraid to use traditional web hosts because of the activities they are involved in. Their target markets include copyright abusers, spammers, malware malcontents and just about any other type of activity… Except child porn and terrorism (thank God for that). Cloudflare, an anti-DDoS provider, was hired by Spamhaus to protect their systems (which remain online).
CyberBunker spokesman Kamphuis claimed that his company isn’t responsible for the DDoS attacks that were first launched last week against Spamhaus. The attackers not only went after CloudFlare’s direct peers, but the exchanges it connect with –the London Internet Exchange, the Amsterdam Internet Exchange, the Frankfurt Internet Exchange, and the Hong Kong Internet Exchange. A blog post by CloudFlare, written last week before the latest run of attacks, explains the mechanism of the attack against Spamhaus and how it can be usde to amplify packet floods. The basic technique of a DNS reflection attack is to send a request for a large DNS zone file with the source IP address spoofed to be the intended victim to a large number of open DNS resolvers. The speed with which your website loads and responds can seriously affect your conversion rate.


Your site may be hosted on a crowded shared server that is slowing it down, or it may be built on a platform that is not correctly optimized.
The answer, of course, is to shrink or compress your images before loading them to your site. Your website speed is one of the most important elements in providing an excellent customer experience.
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There are no secure encryption algorithms optimized for mobile browsers and APIs in TLS right now—these new ciphers fill that gap. The reason this matters is that it'll modify the cipher suites your browser sends in it's ClientHello (and that our servers pick from when sending back the ServerHello). Many internet service providers and Internet networks use these services to reduce the amount of spam they take on. Not surprisingly they appear to be offline at the moment, whether that is due to a DDoS attack or other circumstances is difficult to discern. Traditionally even large botnets are only able to deliver hundreds of megabits or a few gigabits per second. It is a large scale DNS reflection attack that takes advantage of misconfigured DNS servers to amplify the power of a much smaller botnet. They have reported that in a much smaller attack in late 2012 more than 68,000 DNS servers were utilized in a single attack.
This can make access to some sites slow or even temporarily impossible during peak attack volumes. The resolvers then respond to the request, sending the large DNS zone answer to the intended victim. The attacker spoofed the CloudFlare IPs we'd issued for Spamhaus as the source in their DNS requests.
If a site takes more than a few seconds to load, if you can’t immediately scroll down, or if it keeps sticking or crashing, then most people will give up and go elsewhere. You might also want to consider hosting your site on a server local to where most of your users come from. Images are usually the “heaviest” object on a webpage and so are most likely to slow it down. These may have become redundant when replaced by newer versions but are still hanging around.


Chances are if you said yes to both you are being impacted by the largest distributed denial of service (DDoS) ever recorded.
The attackers' requests themselves are only a fraction of the size of the responses, meaning the attacker can effectively amplify their attack to many times the size of the bandwidth resources they themselves control. The open resolvers responded with DNS zone file, generating collectively approximately 75Gbps of attack traffic. Even if they stick with you, it will be a frustrating experience that will not endear your brand to them and so will dissuade them from spending their money. Download your existing photos and save them at a much smaller size and lower quality, then re-upload them. If you have disabled add-ons that you never use, they can still be loading, so delete them. A2B capitulated, dropping CyberBunker, but then filed complaints with the Dutch police against Spamhaus for extortion.
Other companies, such as Google, had made their resources available to help absorb the traffic[9]. Website speed is also a ranking factor in Google algorithms, meaning that a slow site is less likely to show up in a keyword search. Two seconds is the maximum loading time that you should be aiming for, and ideally, you should try to get it down to under half a second. With some files and codes however, it can be difficult to know if they’re necessary or not. The attack was being investigated by five different national cyber-police-forces around the world. Similarly, the average computer screen shows images at 75 dpi, yet many images are loaded at print quality: 200-300 dpi.
The code needed to reduce the image down to a manageable size also eats into your website’s performance. These experts can command sizeable salaries, so think twice as to whether it’s worth keeping them on full-time.




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