{"branchingScenario":{"endScreens":[{"endScreenTitle":"","endScreenSubtitle":"","contentId":-1,"endScreenScore":0}],"startScreen":{"startScreenTitle":"","startScreenSubtitle":""},"l10n":{"startScreenButtonText":"Start the course","endScreenButtonText":"Restart the course","scoreText":"Your score:"},"content":[{"type":{"library":"H5P.BranchingQuestion 1.0","params":{"branchingQuestion":{"alternatives":[{"nextContentId":5,"feedback":{"subtitle":""},"text":"Lab setup"},{"nextContentId":1,"feedback":{"subtitle":""},"text":"NTP (Network Time Protocol)"},{"nextContentId":2,"feedback":{"subtitle":""},"text":"DNS (Domain Name Service)"},{"nextContentId":3,"feedback":{"subtitle":""},"text":"DHCP (Dynamic Host Configuration Protocol)"},{"nextContentId":4,"feedback":{"subtitle":""},"text":"iptables"}],"question":"

Choose your path<\/p>\n"}},"subContentId":"f63e8c66-b62d-4a53-8565-4173ffb1c782","metadata":{"contentType":"Branching Question","license":"U","title":"Choose your path"}},"showContentTitle":false,"feedback":{"subtitle":""},"contentBehaviour":"useBehavioural","forceContentFinished":"useBehavioural"},{"type":{"library":"H5P.CoursePresentation 1.25","params":{"presentation":{"slides":[{"slideBackgroundSelector":{"fillSlideBackground":""},"elements":[{"x":38.81278538812786,"y":2.2549592190625236,"width":12.551369863013699,"height":6.757368642988092,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

NTP lab<\/span><\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"1b1e7181-b99a-4eb1-9275-ad15dea629cf"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":28.538812785388128,"y":9.019836876250094,"width":37.65216894977169,"height":6.757368642988092,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

When do clocks die? When their time is up...<\/em><\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"2fb65370-c734-45d5-9eaf-19053b69f7f7"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":37.67123287671233,"y":15.784714533437665,"width":20.538470319634705,"height":80.91537814538626,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e07e7d2e2c.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":2500,"height":4986}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image","source":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/9\/93\/Clock_Tower_-_Palace_of_Westminster%2C_London_-_May_2007.jpg"},"subContentId":"0dc89b8b-eda1-4c40-a83a-cf9959fe1fe7"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}]},{"elements":[{"x":13.698630136986301,"y":0,"width":67.90894988099427,"height":99.95106738494636,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e745559ea7.png","mime":"image\/png","copyright":{"license":"U"},"width":820,"height":611,"originalImage":{"path":"images\/file-5f0e7431689b9.png#tmp","mime":"image\/png","height":1360,"width":1760}}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image"},"subContentId":"1ee818db-1f6c-4b58-aa02-9bf75bcb38f4"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}],"slideBackgroundSelector":{"fillSlideBackground":""}},{"slideBackgroundSelector":{"fillSlideBackground":""},"elements":[{"x":13.698630136986301,"y":38.3343067240629,"width":73.02317351598174,"height":54.09263823463753,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Time is a very important part of computer networks now. When all our network devices have
\nthe same time, we can correlate logs and know that the time stamps will match between
\ndevices.
\nThere are a number of packages that can work with Ubuntu that will serve as a time server, but
\nthe one that is most commonly used is called ntp in the package server.
\nThe first rule that needs to be followed is that the IP address must be fixed. The NTP server is
\ncontacted with TCP\/IP, so it can\u2019t be found using broadcast messages.<\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"9eb4c0d8-d134-47a2-bb68-7baf5d927855"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":82.19178082191782,"y":0,"width":17.84246575342466,"height":35.245012593947244,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e541a1879e.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":1024,"height":1024}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image","source":"https:\/\/chickadeesolutions-woo-6drz229racfsh09p7h.netdna-ssl.com\/wp-content\/uploads\/2019\/06\/812L5zyAmpL-1024x1024.jpg"},"subContentId":"df551ff5-f77d-4aa3-98f4-17c44adc0e76"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":0,"y":0,"width":17.84246575342466,"height":35.245012593947244,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e541a1879e.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":1024,"height":1024}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image","source":"https:\/\/chickadeesolutions-woo-6drz229racfsh09p7h.netdna-ssl.com\/wp-content\/uploads\/2019\/06\/812L5zyAmpL-1024x1024.jpg"},"subContentId":"cb314e48-5cd7-438c-b9ea-8be36f17486c"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}]},{"slideBackgroundSelector":{"fillSlideBackground":""},"elements":[{"x":0,"y":0,"width":26.229109589041094,"height":72.1210371910424,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

On Server 1<\/span>
\nTo install NTP on this server, use the command apt-get install ntp . After the install is
\ncompleted, we need to edit the configuration files that control the upstream and downstream
\nconnections.
\nUse the vi editor to open \/etc\/ntp.conf to make some changes. Initially, it looks like:<\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"0f945201-623f-4e34-b0f4-86142835ed43"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":27.842465753424655,"y":0,"width":71.45924657534246,"height":99.95106738494636,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e56139087e.png","mime":"image\/png","copyright":{"license":"U"},"width":620,"height":439}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image"},"subContentId":"7992fbc4-51e4-4148-a476-f06c925dac13"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":59.36073059360731,"y":72.15869501000076,"width":6.478310502283105,"height":6.855076025950071,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e56a5554c2.png","mime":"image\/png","copyright":{"license":"U"},"width":6273,"height":3361}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image"},"subContentId":"fb0d01e6-6860-4345-9901-5e68b6c405ba"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":46.80365296803653,"y":92.45332798156346,"width":6.478310502283105,"height":6.855076025950071,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e56a5554c2.png","mime":"image\/png","copyright":{"license":"U"},"width":6273,"height":3361}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image"},"subContentId":"4a6634ab-e271-4cc8-9dae-5bdd6bd2e042"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":66.21004566210046,"y":72.15869501000076,"width":29.665182648401828,"height":11.259755517321471,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Comment out all the iBurst statement's with a # symbol<\/span><\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"4ed5cca2-24f2-4add-a31a-79d396670340"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":53.65296803652968,"y":92.45332798156346,"width":19.39691780821918,"height":5.408136343854221,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Comment out this line<\/span><\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"d3c4c251-9a64-4f17-8361-73d95fad5599"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""}]},{"slideBackgroundSelector":{"fillSlideBackground":""},"elements":[{"x":0,"y":9.019836876250094,"width":61.58299086757991,"height":29.299361621045083,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

It's always important to chose the nearest NTP server if possible. NTP uses pools to find the nearest one to you. The default ones will likely do, however we're here to practice so we'll be changing to chime.utoronto.ca and adding the ca pools. The NTP protocol will use math to determine which NTP server is best out of all the servers we provide it. As of this writing ca.pool.ntp.org consists of 101 ntp servers.<\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"097163ac-8093-45b8-ab55-77a43a1f64d8"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":61.641894977168946,"y":0,"width":38.00422374429223,"height":99.93595915817863,"action":{"library":"H5P.Image 1.1","params":{"contentName":"Image","file":{"path":"images\/file-5f0e58839a912.png","mime":"image\/png","copyright":{"license":"U"},"width":598,"height":796}},"metadata":{"contentType":"Image","license":"U","title":"Untitled Image"},"subContentId":"d7d1abe0-270f-4798-8014-ae4eecb630a0"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":3.4246575342465753,"y":47.350310169640586,"width":39.979109589041094,"height":52.59692378463336,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Make sure you have two NICs with two servers.
\n
\nServer 1<\/strong>
\nNIC1 - NAT using VMware's default DHCP server and gateway
\nNIC2 - 192.168.92.1
\n
\nServer 2<\/strong>
\nNIC1 - NAT using VMware's default DHCP server and gateway
\nNIC2 - 192.168.92.2<\/p>\n"},"metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"cb3ba61f-22df-42ee-b1b6-9b04345b0d6b"},"alwaysDisplayComments":false,"backgroundOpacity":0,"displayAsButton":false,"buttonSize":"big","goToSlideType":"specified","invisible":false,"solution":""},{"x":1.1415525114155252,"y":0,"width":51.34326484018265,"height":6.757368642988092,"action":{"library":"H5P.AdvancedText 1.1","params":{"text":"

Linux Services

Steve Sharpe