perfSONAR User Q&A and Other Discussion

[Michael Johnson <>]

Hi Shawn,

You might also try restarting the docker daemon
like this:
sudo systemctl restart docker

Sometimes docker's firewall rules get dropped for one reason or another, 
and restarting the daemon will recreate them. Note that doing this will 
also restart your docker containers.

- Michael

On 2019-09-24 15:32, Xiao Wang wrote:
> ​Hi Andy,​
>
> the port 861 is open. Is there other files limit the remote host like
> a ACL list?
>
> Thanks,
>
> Shawn
>
> -------------------------
>
> FROM: Andrew Lake <>
> SENT: Tuesday, September 24, 2019 7:12 AM
> TO: Xiao Wang; Antoine Delvaux
> CC: perfsonar-user
> SUBJECT: Re: [perfsonar-user] owping: server denied test
>
> Hi,
>
> When you restarted the container on the server did you include -P and
> --privileged so it exposes port 861?
>
> Thanks,
> Andy
>
> On September 23, 2019 at 6:04:57 PM, Xiao Wang
> () wrote:
>
> > Hello:
> >
> > OWAMP Version is 4.2.0-1. it is a supermicro system with centos7
> > running.
> > Error observed from /var/log/messages:
> > powstream[18059]: OWPControlOpen([10.244.24.6]:861): Couldn't open
> > 'control' connection to server: Connection timed out
> >
> > Note that I run the testpoint node in docker. I ran to this after a
> > container restart. It used to run okay.
> > Thanks,
> > Shawn
> > ________________________________________
> > From: Antoine Delvaux <>
> > Sent: Friday, September 20, 2019 5:21 AM
> > To: Xiao Wang
> > Cc: perfsonar-user
> > Subject: Re: [perfsonar-user] owping: server denied test
> >
> > Hello,
> >
> > Can you confirm us which version of OWAMP you're running? And also
> > on which platform?
> >
> > On the OWAMP server refusing the test, do you see any output from
> > owampd in /var/log/perfsonar/owamp.log or /var/log/message (or
> > /var/log/syslog if Debian) ?
> >
> > Regards,
> >
> > Antoine.
> >
> > > Le 19 sept. 2019 à 15:32,  a écrit :
> > >
> > > Hello,
> > >
> > > I recently found one of our servers failed running owping tests
> > against other
> > > servers. It can ping other servers. Meanwhile, other servers can
> > run owping
> > > against this owping-defaulty server. Noted all of them have the
> > same
> > > configuration.
> > >
> > > The specific error showed below with the "server denied test". If
> > I run owping
> > > test from a to b I will get 100% packet loss. I read this post
> 'https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.internet2.edu_sympa_arc_perfsonar-2Duser_2014-2D08_msg00044.html&d=DwIFaQ&c=yHlS04HhBraes5BQ9ueu5zKhE7rtNXt_d012z2PA6ws&r=gNIJI15rGXZKlSPH4nUtQPw64sKGqtWDs1DI5_XU4hw&m=Egyj52MH2e-tvk6kcOGg-o0-znAH4RDTToO_CumgmnU&s=dRt7p1vU2U0T-KT6f_wiGIHA4rW0Z7XnflrjDcA2BiM&e='
> > > and tried to change the bandwidth from 20M to different values but
> > had no
> > > luck. Feel free to drop any suggestions. Thanks!
> > >
> > > # owping 10.244.14.38
> > > owping: FILE=capi.c, LINE=881, Server denied test: 10.244.14.38
> > > owping: FILE=owping.c, LINE=235, Session Failed!
> > > # ping 10.244.14.38
> > > PING 10.244.14.38 (10.244.14.38) 56(84) bytes of data.
> > > 64 bytes from 10.244.14.38 [1]: icmp_seq=1 ttl=62 time=0.182 ms
> > > 64 bytes from 10.244.14.38 [1]: icmp_seq=2 ttl=62 time=0.338 ms
> > > 64 bytes from 10.244.14.38 [1]: icmp_seq=3 ttl=62 time=0.277 ms
> > > ^C
> > > --- 10.244.14.38 ping statistics ---
> > > 3 packets transmitted, 3 received, 0% packet loss, time 2037ms
> > > rtt min/avg/max/mdev = 0.182/0.265/0.338/0.066 ms
> > >
> > > Regards,
> > > Shawn Wang,
> > > Northwestern Univeristy
> > > --
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