Recently, it has been reported that DNS servers are under attack, and it has always been considered an indestructible DNS server to become increasingly vulnerable. There are also many browser vulnerabilities, the three major vulnerabilities that have just created a download myth in Firefox do not result in DDoS attacks or phishing. security becomes more and more important in the Internet era. In today's news, Red Hat Linux Enterprise Server and Fedora server have been intruded. Fedora is sponsored and supported by Red HatCommunityThe supported open-source collaboration project, which now creates the fedora Scholarship Program and acknowledges outstanding contributors to free software and Fedora projects from universities all over the world and to the upcoming universities. Although there is no evidence that the fedora key is cracked, the conversion of the fedora key is now started because the fedora suite is spread by many third-party websites. In terms of network security, the protection and attack are truly superb. There is no absolute security. optimistic about the existence of so many vulnerabilities to know where they are defective, so that they can be corrected and improved. Look at your opponent with gratitude!