"Internet" Outages of 2 minutes or so

Posted on 2011-10-31
Last Modified: 2016-02-05
I have some fairly knowledgeable users who are reporting "internet" outages of 2 minutes or so.  That is, they can't open web pages and can't get email during those times.
They have been logging when these observations occur.

I've been running a probe that requires 3 lost pings in a row to launch a traceroute.  When something really breaks, the traceroute shows where.
But, I've not captured a bad traceroute, even if one was triggered by 3 lost pings, during the outages reported.

So now I'm wondering if someting else might be going on.
I'm monitoring port errors on the internet connections.  
I'm wondering if email or http specifically might be subject to a failure or interruption and how to automatically test for that?
Question by:Fred Marshall
    LVL 39

    Accepted Solution

    tcptraceroute might be of some help

    There should be a windows version too if you need it.
    You can use tools like curl ( ) to launch various protocol queries agains known sites, includeing verbose logging of actions taken.
    LVL 25

    Author Comment

    by:Fred Marshall
    I'm not sure that any other traceroute would result in anything different as the traceroutes *now* succeed.

    Otherwise, I'm looking for a script/loop that I can lauch and leave runnning.  I can likely write/modify scripts but don't want to go to the trouble to compile.
    LVL 39

    Assisted Solution

    traceroute uses UDP or ICMP modules.  And there is a current practice or routing some protocol according to a preferred pad...
    So if you need to follow http then you tcptraceroute realy can make a difference.
    LVL 25

    Author Comment

    by:Fred Marshall
    OK.  I'll check it out.  
    LVL 25

    Author Closing Comment

    by:Fred Marshall

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