Test-Connection is related to /usr/bin/ping?

is depends on Can’t change.

Test-Connection does not work at all if in linux distribution /usr/bin/ping or /bin/ping has suid.

Steps to reproduce

stat -c %a /usr/bin/ping    # test stat of ping
Test-Connection localhost   # Status is Timeout
ping -c 4 localhost         # Fine

Expected behavior

Working Test-Connection

Actual behavior

 > Test-Connection localhost

   Destination: localhost

Ping Source           Address                   Latency BufferSize Status
                                                   (ms)        (B)
---- ------           -------                   ------- ---------- ------
   1 mymsi            *                               *          * TimedOut
   2 mymsi            *                               *          * TimedOut
   3 mymsi            *                               *          * TimedOut
   4 mymsi            *                               *          * TimedOut


 > Test-Connection google.com         
Test-Connection: Testing connection to computer 'google.com' failed: An exception occurred during a Ping request.
Test-Connection: Testing connection to computer 'google.com' failed: An exception occurred during a Ping request.
Test-Connection: Testing connection to computer 'google.com' failed: An exception occurred during a Ping request.
Test-Connection: Testing connection to computer 'google.com' failed: An exception occurred during a Ping request.

 > Get-Error   

Exception             : 
    Type           : System.Net.NetworkInformation.PingException
    Message        : Testing connection to computer 'google.com' failed: An exception occurred during a Ping request.
    InnerException : 
        Type       : System.Net.NetworkInformation.PingException
        TargetSite : 
            Name          : MoveNext
            DeclaringType : System.Net.NetworkInformation.Ping+<SendWithPingUtilityAsync>d__76, System.Net.Ping, Version=5.0.0.0, Culture=neutral, PublicKeyToke
n=b03f5f7f11d50a3a
            MemberType    : Method
            Module        : System.Net.Ping.dll
        StackTrace : 
   at System.Net.NetworkInformation.Ping.SendWithPingUtilityAsync(IPAddress address, Byte[] buffer, Int32 timeout, PingOptions options)
   at System.Net.NetworkInformation.Ping.SendPingAsyncCore(IPAddress address, Byte[] buffer, Int32 timeout, PingOptions options)
   at System.Net.NetworkInformation.Ping.SendPingAsyncInternal(IPAddress address, Int32 timeout, Byte[] buffer, PingOptions options)
        Message    : An exception occurred during a Ping request.
        Source     : System.Net.Ping
        HResult    : -2146233079
    HResult        : -2146233079
TargetObject          : google.com
CategoryInfo          : ResourceUnavailable: (google.com:String) [Test-Connection], PingException
FullyQualifiedErrorId : TestConnectionException,Microsoft.PowerShell.Commands.TestConnectionCommand
InvocationInfo        : 
    MyCommand        : Test-Connection
    ScriptLineNumber : 1
    OffsetInLine     : 1
    HistoryId        : 49
    Line             : Test-Connection google.com
    PositionMessage  : At line:1 char:1
                       + Test-Connection google.com
                       + ~~~~~~~~~~~~~~~~~~~~~~~~~~
    InvocationName   : Test-Connection
    CommandOrigin    : Internal
ScriptStackTrace      : at <ScriptBlock>, <No file>: line 1
PipelineIterationInfo : 

Environment data

Name                           Value
----                           -----
PSVersion                      7.1.2
PSEdition                      Core
GitCommitId                    7.1.2
OS                             Linux 5.10.15-172.current #1 SMP PREEMPT Fri Feb 12 16:35:57 UTC 2021
Platform                       Unix
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0


# Any Linux distribution there `*bin/ping` has suid (4755)

[vexx32]

The response you get from the ping.Send() method is the same as the test-connection one there; Test-Connection just formats it a bit before outputting it, more or less.

But yeah, I think this is a .NET issue and the issue should be filed over there instead. Not really sure what they were thinking, having a dependence on a native util that doesn’t even give the information that their PingReply object claims to provide. 😕

[vexx32]

That makes a lot of sense as to why pings on Unix are so tricky to work with. Sigh. Would have been a lot more usable in a number of respects if they’d written a proper ping util into .NET instead of trying to reuse an on-box utility like that. 😔