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No, it's not a security risk to open multiple concurrent connections to MySQL or any other real database (MS Access is not a real database). They are made to work like this. The risk you can face is if someone starts more connections to the database than it can handle. In this case, other clients will not be able to be served in time. A DoS, effectively. ...


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It sounds to me like you're running into thread-safety issues. The fix for this, as you've discovered, is to not re-use connections. To your question specifically, no, there is no security risk in opening new connections each time you need to connect to the database. You don't say what technology you're using (besides MySQL) but typically if you're ...


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You should probably not execute database queries to filter data. As far as my knowledge goes there is no risk with opening more connections other than a performance loss. It seems like the problem can be solved with some asynchronous message passing though. If people can run a DoS attack by clicking a filter button rapidly you likely have more serious ...


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I will assume that you're considering stopping Broadcast Radiation, as storm control is a standard term for suppressing such used by multiple vendors such as Cisco, Juniper, and Netgear. In general, this is a problem that is addressed at the network layer, not the host layer. That is because once the packet has been transmitted to the host, and the host ...


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Here are a few tips on setting up challenges and organizing things that you might find useful: https://github.com/pwning/docs/blob/master/suggestions-for-running-a-ctf.markdown


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These are not PCI requirements. You should read the PCI DSS E-commerce Guidelines. Section 3.4 describes "Common E-commerce Implementations" such as: 3rd party API with Direct Post iFrame embedding 3rd party payment page in Merchant's site Redirection to 3rd party payment page and, to quote, These examples are intended to be representative of only ...



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