Understanding Attack Vector How HashMaps work Say a comment form on a blog accepts the parameters – first_name, last_name, comment – as post parameters. Internally, Tomcat stores these parameters as a HashMap. The logical structure of this HashMap is like this – “first_name” –> “Sripathi” “last_name” –> “Krishnan” “comment” —> “DoS using poor Hashes” But … Read more
Cloudflare has published a list of best practices for using it with APIs. TL;DR, they recommend setting a page rule that patches all API requests and putting the following settings on it: Cache Level: Bypass Always Online: OFF Web Application Firewall: OFF Security Level: Anything but “I’m under attack” Browser Integrity Check: OFF
It is a UID which can be used by the website operator (and Cloudflare support) to potentially debug issues. The ray id is actually returned in the headers of most requests through Cloudflare, just not as visibly as what you see in the case of I’m under attack mode.
Look into JS event throttling and debouncing! Those techniques will help you prevent and detect attacks to a certain point (which is, in my opinion, enough for a small multiplayer socket game)… EDIT: In this jsfiddle: http://jsfiddle.net/y4tq9/9/ var sIO = {}; sIO.on = (function(){ var messages = {}; var speedLimit = 5; //5ms return function(message, … Read more
DDOS is a family of attacks which overwhelm key systems in the datacenter including: The hosting center’s network connection to the internet The hosting center’s internal network and routers Your firewall and load balancers Your web servers, application servers and database. Before you start on building your DDOS defence, consider what the worst-case value-at-risk is. … Read more
The best mod_evasive (Focused more on reducing DoS exposure) mod_cband (Best featured for ‘normal’ bandwidth control) and the rest mod_limitipconn mod_bw mod_bwshare
First, this kind of attack is not (mainly) targeting DNS itself as your title suggests. It will of course create some additional load on DNS servers but the main purpose is to DDoS someone else. Bad server configuration might make it worse but in the end this issue is inherent in the design of DNS … Read more
You can eliminate this single point of failure by using two DNS providers. It might also be feasible to run your own DNS server on one of your servers. GoDaddy allows you to do zone transfers from their servers (IIRC premium DNS is required for this). Get a second DNS provider which allows you to … Read more
There are basically three types of DDOS attacks: —–>Application-layer DDOS attack —–>Protocol DOS attack —–>Volume-based DDOS attack > Application layer DDOS attack: Application-layer DDOS attacks are attacks that target Windows, Apache, OpenBSD, or other software vulnerabilities to perform the attack and crash the server. > Protocol DDOS attack DDOS attack : A protocol DDOS attacks … Read more
Faced with the same problem, I chose to ignore all recursive requests. All resolvers do send a non-recursive query when they want to use my server as an authoritative server. Only misconfigured clients and attackers, in my own case, use recursive queries. Unfortunately I haven’t found a way to let BIND do that, but in … Read more