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network-diagnostic-tips [2016/07/15 09:47]
serbizadmin created 		network-diagnostic-tips [2016/07/16 15:53]
serbizadmin
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 ====== Network Diagnostic Tips ====== ====== Network Diagnostic Tips ======
  
-To say that a site is unaccessible is hardly helpful to its administrators. Here are a few tips to help diagnose the issues.+To just say that a site is inaccessible is hardly helpful to its administrators. Please help us address the issue head on by using the following tips:
  
 **1. Run a traceroute from your commandline and from an independent site.**\\ **1. Run a traceroute from your commandline and from an independent site.**\\
-From the command line of your computer, run on Windows  +From the command line of your computer, run on **Windows** \\ 
- tracert myportal.upou.edu.ph\\ +  tracert myportal.upou.edu.ph
- +
-on Mac +
-traceroute myportal.upou.edu.ph +
- +
-Please send the whole results to [email protected]+
  
 +On **Mac** or **Linux**\\
 +  traceroute myportal.upou.edu.ph
 +{{ ::myportal_traceroute_screenshot.png?nolink&600 |}}
 +\\
 +Please send the whole result to [email protected]\\
 +\\
 +From an independent diagnostic site like [[http://network-tools.com|network-tools.com]], a traceroute result would look like this
 +{{ ::nwtools_traceroute.png?nolink |}}
  
 +\\
 +In both cases, the traceroute instances suggest that MyPortal is reachable. In the event that your local traceroute fails but the one from third-party works, please report the issue to your local Internet service provider (ISP).\\
 +\\
 +**2. Change your computer's DNS.** \\
 +It's possible that your local ISP's DNS (Domain Name System) is acting erratically. Change it to some reliable DNS like Google's (8.8.8.8 or 4.4.4.4) or those (208.67.222.222  or 208.67.220.220) from OpenDNS.
 +{{ ::mac_dns.png?nolink&500 |}}
 +DNS is like the phone book of the Internet. It keeps track of website names like myportal.upou.edu.ph.\\
  
 +**3. Help trace possible packet loss with MTR.**\\
 +Using an Admin or root account, run this from the command line\\
 +   mtr myportal.upou.edu.ph
 +That should display something like this:
 +{{ ::myportal_mtr.png?nolink |}}
 +Send your own results to [email protected]\\
 +\\
 +**4. Test your site's DNS.**\\
 +Diagnostic sites like [[http://dnscheck.pingdom.com|Pingdom]] can help your administrator figure out the issue. Report if you find anything strange. 
  
  
 +----
 +For some people, doing all these could be overwhelming. Just do the ones that you can do or are willing to.
Last modified: 2020/06/13 15:10