SkyHorse.Org

Fixing open DNS servers

September 28th, 2006 SkyHorse

Ok, there seems to be a *lot* of posts and threads about this issue and I think a simple page is appropriate.

Lets start with the problem. Check the report for your domain here: http://www.dnsreport.com/tools/dnsreport.ch?domain=YOUR_DOMAIN_HERE.COM

An open DNS server is one that replies to a query about a domain it is not responsible for, to anyone who asks for it. For starters, that is just a waste of processing time, but it can be worse if it is used for flooding. See, since a DNS query is (much!) smaller in number of bytes than a DNS response, if it is spoofed it can be used to perform a DoS attack on a computer with several times the bandwidth of the perpretator.

I’ve posted a solution to my obscure cPanel guide, have a look if your interested:
Fixing Open DNS servers

  • Google Buzz
  • Delicious
  • Facebook
  • Twitter
  • LinkedIn
  • Share/Bookmark
Tags: bind, DNS, GNU/Linux, hacking, hosting, Security, WHM

Related posts:

  • Major flaw on the DNS Internet architecture discovered
  • The Definite Guide of Obscure Tweaks to Install and Maintain cPanel / WHM (version 10)
  • modsec.sh updated

Posted in GNU/Linux, WHM, hosting | No Comments »

  • Tags

    AI apple behavioural-targeting business Computing cPanel deep packet inspection design Downloads Games GNU/Linux google hacking hacking Hardware headphones hosting Ideas Instant Messaging iphone marketing mod-security online-advertising online media Personal Philosophy phorm poker Programming satire scripts Security sociology startups technology Travel ubuntu v-moda Visionarism web-2.0 web-marketing Web Design WHM wunderloop yahoo

  • Pages

    • About
    • Web Server Administration
      • Auto update modsecurity rules – modsec.sh
      • DirectAdmin to cPanel : a partial BASH solution
      • The Definite Guide of Obscure Tweaks to Install and Maintain cPanel / WHM (version 10)
        • Configuring E-mail (Exim) related areas
        • Fixing open DNS servers
        • Monitoring your server
        • Scripts and misc information
        • Security by Obscurity
        • Tweaking apache web server

  • Twitter Updates

    • Ads

    • RSS NMA

      • ITV expands cross-platform offering for This Morning 2 September, 2010
      • Apple launches music social network Ping 2 September, 2010
      • MySpace allows users to sync with Facebook 31 August, 2010

    • RSS Brand Republic

      • My Media Week: James Whitmore, Postar 2 September, 2010
      • Buxton picks cricketer Cook as brand ambassador 2 September, 2010
      • AOL nets five-year Google search deal 2 September, 2010

    • RSS iMedia Connection: Consumer Strategies

      • Social media: What lies ahead
      • The truth about consumers' targeting fears
      • 3 reasons your brand doesn't have more Facebook fans

    • RSS Behavioural Targeting news

      • Moving Targets: Somebody Follow Me, Please? - MediaPost Publications 1 September, 2010
      • Moving Beyond Behavioral Ads - ClickZ News 1 September, 2010
      • Cybercrime Still a Major Concern - eMarketer 1 September, 2010
      • DigiRant: Retargeting Needs Some 411 - digiday:DAILY 31 August, 2010
      • How to Make Google Matter in Social Media - GigaOm (blog) 30 August, 2010

    • RSS Adotas

      • Ping a Threat to Other Social Networks? 2 September, 2010
      • Twitter Swears OAuth for User Safety, Expands Link Shortener 2 September, 2010
      • AOL Renews Its Google Vows 2 September, 2010

    • RSS MarketingVox

      • Savvy Use of Online Ad Technologies Gooses Nevada Tourism Ad ROI 1 September, 2010
      • Users-generated Videos Drive Weather Channel Visits 1 September, 2010
      • Hotmail Adopts New Engagement Metrics 1 September, 2010

    • RSS ExchangeWire.com

      • One Media Manager Onboards Its 200th Facebook Advertiser; Facebook Looking To Launch Ad Network 2 September, 2010
      • OpenX Partners CCI To Build Out Automated Ad Trading Platform In Japan 1 September, 2010
      • AdAudience Moving Its Audience-Buying Offering From Wunderloop to Nugg.ad 31 August, 2010

    • RSS Segmentacion por comportamiento

      • Nota de prensa sobre la compra de wunderloop por Audience Science. 5 July, 2010
      • El gigante americano Audience Science compra wunderloop 5 July, 2010
      • Orange lanza su propio AdExchange 31 March, 2010

    • RSS Sandlines

      • the iPad and Marketing 28 January, 2010
      • The anticipation of disappointment 7 December, 2009
      • Groundhog Day 27 November, 2009

    • Ads

    • Blogroll

      • 90kts
      • Acxiom Poker Nights
      • Amy’s blog
      • Bytter’s blog
      • morena flor no samba da saudade
      • Not Quite There Yet
      • Swedish Pirate Party

    • Cartoons

      • Geek & Poke
      • Order of the Stick
      • User Friendly

    • Gaming

      • Neverwinter Nights

    • online media

      • Knowledge for the Digital Economy
      • Mike on Ads

    • Personal

      • Atelier de Camisa
      • Banksy
      • Designarte
      • My Amazon Wishlist
      • SkyServers.Org

    • Science

      • New Scientist
      • Rex Research
      • ScienceBox
      • Wired

    • Security

      • GPG4Win
      • GPGol
      • GPGShell
      • Mod Security
      • Offline Windows NT(2k,XP) Password Recovery

    • Web Design

      • PageStrength
      • SiteScore
      • UrlTrends

    • Akismet

      55,527 spam comments blocked by
      Akismet

    • Meta

      • Log in
      • Entries RSS
      • Comments RSS
      • WordPress.org

    © 2003 - 2010 Paulo Cunha | SkyHorse.Org is proudly powered by WordPress | Theme based on Bob