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HostStatelast seenStatus
pinger.gzhu.edu.cnIs not working10/20/2018 
pingersonar-um.myren.net.myNo response. Sent email requesting help 12/24/2018.6/26/2018 Host pingable but web server does not respond.
pinger.isra.edu.pkDown, it came up Sep 2-4, 2018. It is pinging, however, all the targets are not responding after 31 tries, email sent to Wajahat 9/18/2018. As of 10/14/2018 it is not pingable.March 6, 2018 
pingeramity.inIt has been working since 28th July. It is unclear how stable it is. It is down again 9/5/2018. Worked again from 9/24/2018 to 9/28/2018. Emailed Amity requesting clarification 10/3/2018. They are looking at it. No response 12/24/2018. It is still unreliable, details of unreliability, e.g. not pingable at times and no data some days, sent email 12/23/2018.April 27, 2018 

Context:

  • Is there any statistical difference between ICMP and TCP Ping? The context here is the Internet (not data center). This is important because the network stack is different (e.g., MPI over infiniband) and latencies are significantly less.

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