Amazon's experiment wireless mesh networking has turned users into guinea pigs. If you use Alexa, Echo, or any other Amazon device, you have only 10 days to opt out of an experiment that leaves your personal privacy and security hanging in the balance. . On June 8, the merchant, Web host, and entertainment behemoth will automatically enroll the devices in Amazon Sidewalk. The new wireless mesh service will share a small slice of your Internet bandwidth with nearby neighbors who don’t have connectivity and help you to their bandwidth when you don’t have a connection. By default, Amazon devices including Alexa, Echo, Ring, security cams, outdoor lights, motion sensors, and Tile trackers will enroll in the system. And since only a tiny fraction of people take the time to change default settings, that means millions of people will be co-opted into the program whether they know anything about it or not. The Amazon webpage linked above says Sidewalk "is currently only available in the US." . Participants need to disable the Amazon Sidewalk sharing option to ensure their privacy and security prior to the activation phase.. Amazon Sidewalk, Smart Devices, Wireless Networking, Internet Privacy, Data Security. . LinuxSecurity.com Team
Last week in Part 1 we began uncovering some of the mysteries of tables and chains, and how to build iptables rules. This week we will dig more into writing rules for basic firewalling, sharing an Internet connection, and scripting. . .. Last week in Part 1 we began uncovering some of the mysteries of tables and chains, and how to build iptables rules. This week we will dig more into writing rules for basic firewalling, sharing an Internet connection, and scripting . We can't close off all ports; that will shut us off completely. We also can't just specify that certain ports will remain open, since it's impossible to predict which ports non-service programs will grab. And simply allowing traffic destined for specific ports does nothing to prevent malicious bits from waltzing right on in. So what exactly can we do to set up an effective rule that allows the good guys to pass through while preventing the bad ones from accessing our network? For starters, we can take advantage of the syn flag set to prevent unauthorized access. While iptables examines only headers, not payload, it still does a lot of useful packet analysis based on the headers. For example, when Web surfing, a request goes from your PC to a web server out there somewhere. The web server then responds and sends packets back to you, grabbing the first convenient ephemeral (temporary) port on your system. Other than responding to your request, the server has no reason whatsoever to be sending traffic your way. We can take advantage of this by setting up a rule that blocks all incoming TCP connections that are not initiated by your system: The link for this article located at CrossNodes is no longer available. . Discover effective iptables configurations to boost security by blocking unwanted traffic, facilitating secure internet sharing, and enabling strong scripting to prevent unauthorized access. iptables tutorial, firewall rules, network analysis. . Anthony Pell
Now that relatively high-bandwidth Internet connections are becoming both commonplace and inexpensive, cable modem and DSL users wanting to put more than one computer on the Internet find that their Internet service provider will not allow them to do so. . . .. Now that relatively high-bandwidth Internet connections are becoming both commonplace and inexpensive, cable modem and DSL users wanting to put more than one computer on the Internet find that their Internet service provider will not allow them to do so. Typically, an ISP will grant a user a single, dynamically-allocated IP address to be used by only one computer at the user's home, in order to conserve their precious pool of IP addresses. The link for this article located at Linux.com is no longer available. . IP masquerading efficiently facilitates bandwidth sharing by allowing multiple devices to connect to the internet using a single public IP address without revealing internal structure. IP Masquerading, Networking Solutions, High-Bandwidth. . Anthony Pell
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