tag:blogger.com,1999:blog-58329701970327327102024-03-13T17:30:44.652-07:00SCTP - Savior of the mobile internetsctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-5832970197032732710.post-40984013559149126952009-03-16T11:55:00.000-07:002009-03-16T13:12:40.090-07:00Real time searching with Twitter and Google<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgB5WEQaodwTVrIKs77bbDKqMgayMGLBsjmPE2SCA0KXXti_zrXoE-oS2hIexgJ7LzwaKUX3KKfqpdVDhRc-85ASpwxHhzcN27C0ghuCnrvZ_HntKdljgLWzHOdec-a-OBDcgHTJNktVmc/s1600-h/twoogle.jpg"><img style="margin: 0pt 10px 10px 0pt; float: left; cursor: pointer; width: 200px; height: 100px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgB5WEQaodwTVrIKs77bbDKqMgayMGLBsjmPE2SCA0KXXti_zrXoE-oS2hIexgJ7LzwaKUX3KKfqpdVDhRc-85ASpwxHhzcN27C0ghuCnrvZ_HntKdljgLWzHOdec-a-OBDcgHTJNktVmc/s200/twoogle.jpg" alt="" id="BLOGGER_PHOTO_ID_5313876804841316146" border="0" /></a>A few days ago I came across a tweet on real time searching and thought I'd have a look.<br /><br />After installing a greasemonkey script in Firefox I can now do realtime searches in twitter alongside my regular Google results.<br /><br />This for me opens up a new avenue of usefulness created by twitter's memory banks as I will regularly use Google and not Twitter search.<br /><br />What it highly evident is that for searches about news related items I will receive information much quicker than it's being reported by news based agency's with standard media (With this I include web sites). Duh that's obvious you say, but I'm amazed at the time lag.<br /><br />Most of the news agencies have twitter breaking news accounts "bbcbreaking" for example.<br />If I look at their most recent post on twitter I see a news story about the Madagasgan army from 3 hours ago. If I check their website I see it was uploaded only 10 mins ago.<br /><br />Tweets from a non news agency would be even quicker as demonstrated by the recent <a href="http://www.telegraph.co.uk/news/worldnews/europe/germany/4974916/Germany-school-shooting-Twitter-first-with-the-news-again.html"><b>shooting</b></a> in Germany last week.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzk1Fh4Ru1ZxzJ1Qr5gzHBFAu2K-_dxIaXBLpK5Ytxo0KM_ahU8vddpW_gB7dUZITbVQARG2JRU_N_tXfAqQRS3eNbnnoPFOIkQvVj9Y_EIwnmB_dffJjjdxxCVPe7G3ZMyaVCY0L1kvU/s1600-h/explosion1.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 336px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzk1Fh4Ru1ZxzJ1Qr5gzHBFAu2K-_dxIaXBLpK5Ytxo0KM_ahU8vddpW_gB7dUZITbVQARG2JRU_N_tXfAqQRS3eNbnnoPFOIkQvVj9Y_EIwnmB_dffJjjdxxCVPe7G3ZMyaVCY0L1kvU/s400/explosion1.JPG" alt="" id="BLOGGER_PHOTO_ID_5313876690182351090" border="0" /></a><br />It's a bit like watching the football in the pub with one TV on terrestrial and the other on Sky.<br />On hearing the crowd cheer at the other end of the room you instantly look over and see the scoreline then return to your TV to watch the action unfold.<br />Now if only if I could find a beer plugin for firefox I'd be quite content.<br /><br />Full details and how to install this great piece of work can be found at <a href="http://mt-hacks.com/20090302-realtime-twitter-search-results-on-google.html"><b>mt-hacks</b></a>sctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.com0tag:blogger.com,1999:blog-5832970197032732710.post-4606451898678488962009-03-12T12:17:00.000-07:002009-03-12T14:27:09.861-07:00When I grow up I'm gonna be a bitpipe<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" 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mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p class="MsoNormal">It's only been 2 weeks since Orange and O2 in the UK displayed anger towards Nokia over the inclusion of Skype on their N97. Rumours bounced around of them throwing the rattle out of the pram and not wanting to stock the possible iphone killer.<br /><br />Well I suppose it's not as bad as 96 when US telecoms companies asked congress to ban IP phones.<br /><br />Since then O2 have confirmed it will not rule out stocking the handset "if the experience is right" whatever that means. Let’s see what Orange has to say in the coming weeks.<br /><br />But why all the fuss?<br />For years mobile operators have been trying to identify themselves as something different to that of a bitpipe. But what are they actually doing about it apart from producing unintelligible adverts and creating complex price plans.<br /><br />All the great new mobility services I see are developed by the likes of Google, Flickr, Twitter and Skype... the list goes on.<br /><br />Application nirvana began with the synergy of handset manufactures and these very software developers, this has now exploded as the user can access these application shop fronts directly. Android market and itunes apps are already paving the way.<br /><br />With Nokia's Ovi store (May 09) and similar offerings from Microsoft to follow it looks as if traditional mobile operator offerings such as voicemail and callback (any more I ask ?) will be floundering in their wake.<br />With Google voice hitting Beta yesterday these apps just keep coming.<br /><br />Mobile operators should embrace these edge applications and see how they can work together with developers to improve their subscriber’s quality of experience.<br />If they expand the IP horizon as far as it will go (3GPP Rel8 anyone ?) and invest in their existing cores it should help them flourish as a proud bitpipe.<br /><br />Hey they might even look to implement IPv6 but that won't become an issue until 2012 will it?</p>sctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.com0tag:blogger.com,1999:blog-5832970197032732710.post-79233532364497939852009-03-12T08:16:00.000-07:002009-03-12T14:29:41.941-07:00Quality of our network pressOK I like to keep up with the current trends in my industry, on occasion I look to the press for interesting articles. Sadly a lot of this is marketing fluff, misunderstood technology (researched by the gossip columnist on a quiet day?). Saying that, you can usually find a route to the real information if you look under the cover, but best of all it gives me a good laugh.<br /><br />Just have a look at how the top two <span class="blsp-spelling-error" id="SPELLING_ERROR_0">newsfeeds</span> <span class="blsp-spelling-corrected" id="SPELLING_ERROR_1">interpret</span> the same story, the bottom one just tries to spice it up with some sexual <span class="blsp-spelling-corrected" id="SPELLING_ERROR_2">connotations</span>.<br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjmqQ9-seJA-UzeuH2vZxu-MSvrdkX9JiQN2vDy8sOe4xYKKVdIlM9SjFG9VrAAOMP8XZ33h6iWw9RsyRz6IBp5Yq7paTviV8rnjW2IIeYFb9IrU_eNNz24emTPYashPzfgrQ1Di5yJ9M/s1600-h/ipv6-funny.JPG"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 73px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjjmqQ9-seJA-UzeuH2vZxu-MSvrdkX9JiQN2vDy8sOe4xYKKVdIlM9SjFG9VrAAOMP8XZ33h6iWw9RsyRz6IBp5Yq7paTviV8rnjW2IIeYFb9IrU_eNNz24emTPYashPzfgrQ1Di5yJ9M/s400/ipv6-funny.JPG" alt="" id="BLOGGER_PHOTO_ID_5312322952700693554" border="0" /></a><br />If anyone else has anything similar please let me know. Maybe this could be the start of my very own networking <span class="blsp-spelling-error" id="SPELLING_ERROR_3">colemanballs</span> collection.sctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.com0tag:blogger.com,1999:blog-5832970197032732710.post-60958427043433933862009-03-10T10:00:00.000-07:002009-03-12T08:08:25.600-07:00Using Dummynet to simulate WAN links (2/2)<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBDn2fTJeGVgF0_w_RdrIy3N-xswUPTMhQvFPyiPGsBIQcbym1iDEs486BulVKKV9pStVJ8ZiCIE7Vj3e9wJvtzO6oykAUoPP7JiRIkZRPp7ZoyEkd7GVJcPce0J5Y44X9TwTPwbVHwIk/s1600-h/freebsd.jpg"><img style="margin: 0pt 10px 10px 0pt; float: left; cursor: pointer; width: 117px; height: 124px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBDn2fTJeGVgF0_w_RdrIy3N-xswUPTMhQvFPyiPGsBIQcbym1iDEs486BulVKKV9pStVJ8ZiCIE7Vj3e9wJvtzO6oykAUoPP7JiRIkZRPp7ZoyEkd7GVJcPce0J5Y44X9TwTPwbVHwIk/s200/freebsd.jpg" alt="" id="BLOGGER_PHOTO_ID_5312317439274319922" border="0" /></a><br />Thought it might be a good idea to split these sections as you only install once (Sounds like a bad Bond movie) So this part I'll deal with the operation of <span class="blsp-spelling-error" id="SPELLING_ERROR_0">Dummynet</span>:<br /><!--[if gte mso 9]><xml> <w:worddocument> <w:view>Normal</w:View> <w:zoom>0</w:Zoom> <w:trackmoves/> <w:trackformatting/> <w:punctuationkerning/> <w:validateagainstschemas/> <w:saveifxmlinvalid>false</w:SaveIfXMLInvalid> <w:ignoremixedcontent>false</w:IgnoreMixedContent> <w:alwaysshowplaceholdertext>false</w:AlwaysShowPlaceholderText> <w:donotpromoteqf/> <w:lidthemeother>EN-GB</w:LidThemeOther> <w:lidthemeasian>X-NONE</w:LidThemeAsian> 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mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--> <p class="11BodyText"><span lang="EN-US">Dummynet is contolled by the IPFW command but first we have to configure both Ethernet interfaces and set them up for bridging.</span></p> <p class="11BodyText"><span lang="EN-US">Configure both interfaces with an IP address within the same subnet (Any will do) as below:</span></p> <p class="11BodyText"><i><span lang="EN-US"># Ifconfig dc0 inet 192.168.0.253 netmask 255.255.255.0<o:p></o:p></span></i></p> <p class="11BodyText"><i><span lang="EN-US"># Ifconfig rl0 inet 192.168.0.252 netmask 255.255.255.0</span></i></p><p class="11BodyText"><span style="font-weight: bold;" lang="EN-US">Note:</span><span style="font-style: italic;" lang="EN-US"> These IP address aren't actually visible to external devices, so they don't have to conform to the exiting subnet surrounding your server (It just appears as a L2 device, which the following command enables)</span><i><span lang="EN-US"><br /></span></i></p> <p class="11BodyText"><span lang="EN-US">Then link both interfaces together so they will bridge packets rather than route them:</span></p> <p class="11BodyText"><i><span lang="EN-US"># sysctl –w net.link.ether.bridge.enable=1<o:p></o:p></span></i></p> <p class="11BodyText"><i><span lang="EN-US"># sysctl –w net.link.ether.bridge.config=dc0,rl0</span></i></p> <p class="11BodyText"><span lang="EN-US">Now we can define a firewall pipe where we can control the bandwidth and delay</span></p> <p class="11BodyText"><i><span lang="EN-US"># ipfw add pipe 1 ip from any to any<o:p></o:p></span></i></p> <p class="11BodyText"><i><span lang="EN-US"># ipfw pipe 1 config bw 3200Kbit/s queue 10 delay 150ms</span></i></p> <p class="11BodyText"><span lang="EN-US">Now check the firewall rulesets and delete any lines which have a lower value than the rules you just entered.</span></p> <p class="11BodyText"><i><span lang="EN-US"># ipfw show<o:p></o:p></span></i></p> <p class="11BodyText"><i><span lang="EN-US"># ipfw delete <number></number></span></i></p> <p class="11BodyText"><span lang="EN-US">Dummynet is now up and configured. You should be able to change bandwidth as per the ipfw pipe command shown above.</span></p> <p class="11BodyText"><span lang="EN-US">Surprisingly it's quite accurate, you can verify this yourself (always good practice) with some other tools (Future blog me thinks) and maybe an FTP server.<br /></span></p>sctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.com0tag:blogger.com,1999:blog-5832970197032732710.post-4290014375477749012009-03-10T08:40:00.000-07:002009-03-12T08:04:19.797-07:00Using Dummynet to simulate WAN links (1/2)<!--[if gte mso 9]><xml> <w:worddocument> <w:view>Normal</w:View> <w:zoom>0</w:Zoom> <w:trackmoves/> <w:trackformatting/> <w:punctuationkerning/> <w:validateagainstschemas/> <w:saveifxmlinvalid>false</w:SaveIfXMLInvalid> <w:ignoremixedcontent>false</w:IgnoreMixedContent> <w:alwaysshowplaceholdertext>false</w:AlwaysShowPlaceholderText> <w:donotpromoteqf/> <w:lidthemeother>EN-GB</w:LidThemeOther> <w:lidthemeasian>X-NONE</w:LidThemeAsian> 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mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8OO4d6A9Z9IJPbauJsNJZDiEYKb3qc_5Ya7GF7JnmMyT1-PqbovGxfGvPPdlOJyKAgJWi9n2VdnQCcxA0epfe-ObdGDNFtJtIm-qznjpfX9uMgdq_p39RGYpH4M5EkNnSwe0bv3T2LKA/s1600-h/freebsd.jpg"><img style="margin: 0pt 10px 10px 0pt; float: left; cursor: pointer; width: 117px; height: 124px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8OO4d6A9Z9IJPbauJsNJZDiEYKb3qc_5Ya7GF7JnmMyT1-PqbovGxfGvPPdlOJyKAgJWi9n2VdnQCcxA0epfe-ObdGDNFtJtIm-qznjpfX9uMgdq_p39RGYpH4M5EkNnSwe0bv3T2LKA/s200/freebsd.jpg" alt="" id="BLOGGER_PHOTO_ID_5312316979347109330" border="0" /></a><span lang="EN-US">OK my </span><span lang="EN-US">1st Blog so I'll try to make it slightly interesting rather than my 1st <span class="blsp-spelling-error" id="SPELLING_ERROR_0">forray</span> into basic programming with "hello world" plastered across the screen.</span><p class="11BodyText">There are a few network simulation tools out there, but most of these will require a six figure sum to work with. There are some good alternatives that are free. One of which is included within the Free BSD Kernel called <span class="blsp-spelling-error" id="SPELLING_ERROR_1">DummyNet</span>. If you want to simulate artificial delay, packet loss and bandwidth policing, grab yourself a spare server and follow the instructions below:<br /></p><p class="11BodyText"><span lang="EN-US">PART </span><span lang="EN-US">1 of 2 (Installing FreeBSD and checking DummyNet options)</span></p><p class="11BodyText"><span lang="EN-US"><br /></span></p><p class="11BodyText"><span lang="EN-US">Dummynet is a capability that lives within the Free BSD Kernel.</span></p><p class="11BodyText"><span lang="EN-US">Free BSD 6.2 was used in my tests and can be found at <a href="http://www.freebsd.org/where.html">http://www.freebsd.org/where.html</a> </span></p> <p class="11BodyText"><span lang="EN-US">After installing onto a new device with two PCI Ethernet cards the kernel was rebuilt. To see if the Kernel requires rebuilding check the file at: /usr/src/sys/i386/conf/GENERIC</span></p> <p class="11BodyText"><span lang="EN-US">See if the following options are included</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS BRIDGE</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS IPFIREWALL</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS IPFIREWALL_VERBOSE</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS IPFIREWALL_VERBOSE_LIMIT</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS DUMMYNET</span></p> <p class="11BodyText"><span lang="EN-US">OPTIONS HZ=1000</span></p> <p class="11BodyText"><span lang="EN-US">If they are not copy (cp) this file to a new file called MYKERNEL and add the above options</span></p> <p class="11BodyText"><span lang="EN-US">Change to the /usr/src directory </span></p> <p class="11BodyText"><span lang="EN-US">#<span style=""> </span><i>cd /usr/src</i></span></p> <p class="11BodyText"><span lang="EN-US">Compile the kernel with</span></p> <p class="11BodyText"><span lang="EN-US"># <i>make buildkernel KERNCONF=MYKERNEL</i></span></p> <p class="11BodyText"><span lang="EN-US">Install the ner kernel</span></p> <p class="11BodyText"><span lang="EN-US"># <i>make installkernel KERNCONF=MYKERNEL<o:p></o:p></i></span></p> <p class="11BodyText"><span lang="EN-US">The new kernel will be copied to the /boot/kernel directory as /boot/kernel/kernel and the old kernel will be moved to /boot/kernel.old/kernel. Now, shutdown the system and reboot to use your new kernel.</span></p><p class="11BodyText">Next Blog see how to apply and run.<br /></p><p class="11BodyText"><span lang="EN-US"><br /></span></p>sctphttp://www.blogger.com/profile/03422376170803836375noreply@blogger.com1