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Showing posts from August, 2009

When 'ping' fails

In Networking, the 'performance objects' are links, usually end-to-end, consisting of many elements - like ethernet segments, switches, routers/firewalls, long-distance circuits and security scanner devices, laid on top of Telco/backbone services that provide dynamic and asymmetrical routes. The most frequently used measure is 'ping' time - ICMP “echo request” packets, often 64 bytes long. Firewalls, routers and underlying networks filter/block classes of traffic, implement traffic & flow rules and attempt "Quality of Service". There are many common rulesets in use: blocking 'ping' outright for 'security reasons'. Stops trivial network scanning. QoS settings for different traffic classes. VoIP/SIP gets high priority, FTP traffic is low, your guess on HTTP, DNS, time (NTP) and command line access - SSH, Telnet, ... traffic profiling on IP type (ICMP, UDP, TCP) and packet size (vs link MTU). traffic prioritisation based on source/destination....

Rupert Murdoch - Fool or Genius?

Does Rupert Murdoch know something the rest of us don't? The recent news is that News Ltd would start charging for on-line access to its newspapers. Not a good idea. Experienced Journalist & commentator, Alan Kohler also thinks so ... First, Rupert is not in the business of selling 'news', quality journalism or not. He sells Advertising . Just like Google and friends. But apparently not nearly as well as they do on-line. There are people who sell 'news', and they are going strong. Organisations like Reuters, Associated Press, Bloomberg, AAP, ... The wire-services. The same ones that sell to Google, businesses, TV and Mr Murdoch's newspapers. News Ltd doesn't sell journalistic content (news): like every major newspaper, it has always given away its content. Exactly the same as Free-to-Air radio and TV. The "value proposition" to most newspaper customers, News & Stories, is a Free Good. Major papers actually cost their publishers to sell...