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Gonzalo San Gil, PhD.

Server Hardening | Linux Journal - 0 views

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    "Jan 14, 2016 By Greg Bledsoe in HOW-TOs Security Servers SysAdmin Server hardening. The very words conjure up images of tempering soft steel into an unbreakable blade, or taking soft clay and firing it in a kiln, producing a hardened vessel that will last many years. Indeed,hardenis very much like that"
Gonzalo San Gil, PhD.

25 Hardening Security Tips for Linux Servers - 0 views

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    "Securing a system in a production from the hands of hackers and crackers is a challenging task for a System Administrator. This is our first article related to "How to Secure Linux box" or "Hardening a Linux Box". In this post We'll explain 25 useful tips & tricks to secure your Linux system. Hope, below tips & tricks will help you some extend to secure your system."
Paul Merrell

Internet Giants Erect Barriers to Spy Agencies - NYTimes.com - 0 views

  • As fast as it can, Google is sealing up cracks in its systems that Edward J. Snowden revealed the N.S.A. had brilliantly exploited. It is encrypting more data as it moves among its servers and helping customers encode their own emails. Facebook, Microsoft and Yahoo are taking similar steps.
  • After years of cooperating with the government, the immediate goal now is to thwart Washington — as well as Beijing and Moscow. The strategy is also intended to preserve business overseas in places like Brazil and Germany that have threatened to entrust data only to local providers. Google, for example, is laying its own fiber optic cable under the world’s oceans, a project that began as an effort to cut costs and extend its influence, but now has an added purpose: to assure that the company will have more control over the movement of its customer data.
  • A year after Mr. Snowden’s revelations, the era of quiet cooperation is over. Telecommunications companies say they are denying requests to volunteer data not covered by existing law. A.T.&T., Verizon and others say that compared with a year ago, they are far more reluctant to cooperate with the United States government in “gray areas” where there is no explicit requirement for a legal warrant.
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  • Eric Grosse, Google’s security chief, suggested in an interview that the N.S.A.'s own behavior invited the new arms race.“I am willing to help on the purely defensive side of things,” he said, referring to Washington’s efforts to enlist Silicon Valley in cybersecurity efforts. “But signals intercept is totally off the table,” he said, referring to national intelligence gathering.“No hard feelings, but my job is to make their job hard,” he added.
  • In Washington, officials acknowledge that covert programs are now far harder to execute because American technology companies, fearful of losing international business, are hardening their networks and saying no to requests for the kind of help they once quietly provided.Continue reading the main story Robert S. Litt, the general counsel of the Office of the Director of National Intelligence, which oversees all 17 American spy agencies, said on Wednesday that it was “an unquestionable loss for our nation that companies are losing the willingness to cooperate legally and voluntarily” with American spy agencies.
  • Many point to an episode in 2012, when Russian security researchers uncovered a state espionage tool, Flame, on Iranian computers. Flame, like the Stuxnet worm, is believed to have been produced at least in part by American intelligence agencies. It was created by exploiting a previously unknown flaw in Microsoft’s operating systems. Companies argue that others could have later taken advantage of this defect.Worried that such an episode undercuts confidence in its wares, Microsoft is now fully encrypting all its products, including Hotmail and Outlook.com, by the end of this year with 2,048-bit encryption, a stronger protection that would take a government far longer to crack. The software is protected by encryption both when it is in data centers and when data is being sent over the Internet, said Bradford L. Smith, the company’s general counsel.
  • Mr. Smith also said the company was setting up “transparency centers” abroad so that technical experts of foreign governments could come in and inspect Microsoft’s proprietary source code. That will allow foreign governments to check to make sure there are no “back doors” that would permit snooping by United States intelligence agencies. The first such center is being set up in Brussels.Microsoft has also pushed back harder in court. In a Seattle case, the government issued a “national security letter” to compel Microsoft to turn over data about a customer, along with a gag order to prevent Microsoft from telling the customer it had been compelled to provide its communications to government officials. Microsoft challenged the gag order as violating the First Amendment. The government backed down.
  • Hardware firms like Cisco, which makes routers and switches, have found their products a frequent subject of Mr. Snowden’s disclosures, and their business has declined steadily in places like Asia, Brazil and Europe over the last year. The company is still struggling to convince foreign customers that their networks are safe from hackers — and free of “back doors” installed by the N.S.A. The frustration, companies here say, is that it is nearly impossible to prove that their systems are N.S.A.-proof.
  • In one slide from the disclosures, N.S.A. analysts pointed to a sweet spot inside Google’s data centers, where they could catch traffic in unencrypted form. Next to a quickly drawn smiley face, an N.S.A. analyst, referring to an acronym for a common layer of protection, had noted, “SSL added and removed here!”
  • Facebook and Yahoo have also been encrypting traffic among their internal servers. And Facebook, Google and Microsoft have been moving to more strongly encrypt consumer traffic with so-called Perfect Forward Secrecy, specifically devised to make it more labor intensive for the N.S.A. or anyone to read stored encrypted communications.One of the biggest indirect consequences from the Snowden revelations, technology executives say, has been the surge in demands from foreign governments that saw what kind of access to user information the N.S.A. received — voluntarily or surreptitiously. Now they want the same.
  • The latest move in the war between intelligence agencies and technology companies arrived this week, in the form of a new Google encryption tool. The company released a user-friendly, email encryption method to replace the clunky and often mistake-prone encryption schemes the N.S.A. has readily exploited.But the best part of the tool was buried in Google’s code, which included a jab at the N.S.A.'s smiley-face slide. The code included the phrase: “ssl-added-and-removed-here-; - )”
Paul Merrell

Google Says Website Encryption Will Now Influence Search Rankings - 0 views

  • Google will begin using website encryption, or HTTPS, as a ranking signal – a move which should prompt website developers who have dragged their heels on increased security measures, or who debated whether their website was “important” enough to require encryption, to make a change. Initially, HTTPS will only be a lightweight signal, affecting fewer than 1% of global queries, says Google. That means that the new signal won’t carry as much weight as other factors, including the quality of the content, the search giant noted, as Google means to give webmasters time to make the switch to HTTPS. Over time, however, encryption’s effect on search ranking make strengthen, as the company places more importance on website security. Google also promises to publish a series of best practices around TLS (HTTPS, is also known as HTTP over TLS, or Transport Layer Security) so website developers can better understand what they need to do in order to implement the technology and what mistakes they should avoid. These tips will include things like what certificate type is needed, how to use relative URLs for resources on the same secure domain, best practices around allowing for site indexing, and more.
  • In addition, website developers can test their current HTTPS-enabled website using the Qualys Lab tool, says Google, and can direct further questions to Google’s Webmaster Help Forums where the company is already in active discussions with the broader community. The announcement has drawn a lot of feedback from website developers and those in the SEO industry – for instance, Google’s own blog post on the matter, shared in the early morning hours on Thursday, is already nearing 1,000 comments. For the most part, the community seems to support the change, or at least acknowledge that they felt that something like this was in the works and are not surprised. Google itself has been making moves to better securing its own traffic in recent months, which have included encrypting traffic between its own servers. Gmail now always uses an encrypted HTTPS connection which keeps mail from being snooped on as it moves from a consumer’s machine to Google’s data centers.
  • While HTTPS and site encryption have been a best practice in the security community for years, the revelation that the NSA has been tapping the cables, so to speak, to mine user information directly has prompted many technology companies to consider increasing their own security measures, too. Yahoo, for example, also announced in November its plans to encrypt its data center traffic. Now Google is helping to push the rest of the web to do the same.
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    The Internet continues to harden in the wake of the NSA revelations. This is a nice nudge by Google.
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