![]() "Go to /HNAP1/, and, hopefully, you'll get no response back, if that's the only good thing. "As soon as you get home, this is something you want to do with all your routers," Horowitz told the tech-savvy crowd. ( Linksys quickly issued a firmware patch.) In 2014, a router worm called TheMoon used the HNAP protocol to identify vulnerable Linksys-brand routers to which it could spread itself. In and of itself, it's not such a big deal," Horowitz said.īut, he added, "UPnP on the internet is like going in for surgery and having the doctor work on the wrong leg."Īnother problem is the Home Network Administration Protocol (HNAP), a management tool found on some older consumer-grade routers that transmits sensitive information about the router over the Web at IP address]/HNAP1/, and grants full control to remote users who provide administrative usernames and passwords (which many users never change from the factory defaults). "UPnP was designed for LANs, and as such, it has no security. Millions of routers throughout the world, even some of the best ones, have the Universal Plug and Play (UPnP) networking protocol enabled on internet-facing ports, which exposes them to external attack. ![]() Some other devices will not accept passwords longer than 16 characters - the minimum length for password safety today. Many consumer-grade home-gateway devices fail to notify users if and when firmware updates become available, even though those updates are essential to patch security holes, Horowitz noted. If addresses are already specified, you can move the new ones to the top of the list, or remove the old ones."A compromised router can spy on you," Horowitz said, explaining that a router under an attacker's control can stage a man-in-the-middle attack, alter unencrypted data or send the user to "evil twin" websites masquerading as often-used webmail or online-banking portals. Enter the servers that you want to connect to. Click your connection, click Advanced, and then the DNS tab. Change the DNS servers on Mac: Open the Apple menu, click System Preferences, select Network, and click the padlock to make changes.If addresses are already specified, you can replace them, or you can try obtaining them automatically to see if that helps. To specify servers, select Use the following DNS server addresses and enter the addresses of the ones you want to use. Right-click your network adapter, select Properties, highlight "Internet Protocol Version 4" in the list and click the Properties button. Change the DNS servers on Windows: Press Windows key + R and type ncpa.cpl to open Network Connections.You'll want to write down the IP addresses for both the primary and secondary DNS servers. Find a reliable public/free DNS server, such as the ones available from Google, Cloudflare, and OpenDNS. ![]() X Research source Usually your computer will be set to obtain DNS server info automatically, but you can specify servers if you wish. This is common when using DNS service providers that use security blacklists to block known rogue sites. The DNS servers your device is set to use may be blocking the site you're trying to visit.
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