There was a major network problem at CERN this morning. It has apparently been resolved but not yet understood, according to the above link.

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quests lots of data from cmsfrontier.cern.ch, usually via TCP port 8000.
Since the outage at CERN this morning my running VMs partly generate requests to cmsfrontier.cern.ch TCP port 80 instead.

A check shows that port 8000 responds as expected but not port 80.

[pre]nc -v -z -w 5 cmsfrontier.cern.ch 8000
Connection to cmsfrontier.cern.ch 8000 port [tcp/irdmi] succeeded!

nc -v -z -w 5 cmsfrontier.cern.ch 80
nc: connect to cmsfrontier.cern.ch port 80 (tcp) timed out: Operation now in progress[/pre]
It should also be checked why the VMs generate wrong requests.

That's working for me now:

[eesridr@pion:BOINC] > nc -v -z -w 5 cmsfrontier.cern.ch 8000
Connection to cmsfrontier.cern.ch 8000 port [tcp/irdmi] succeeded!
[eesridr@pion:BOINC] > nc -v -z -w 5 cmsfrontier.cern.ch 80
Connection to cmsfrontier.cern.ch 80 port [tcp/http] succeeded!

Thanks for the report, I guess it's up to CERN to look at the VM operation.
BTW, the outage affected our WMAgent too, but that was quickly rectified.

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gh my project tasks are back to normal operation I wonder if there is an access restriction to port 80 for connections coming from outside.

I suspect this because the test is still not working:
[pre]nc -v -z -w 5 cmsfrontier.cern.ch 80
nc: connect to cmsfrontier.cern.ch port 80 (tcp) timed out: Operation now in progress[/pre]

I crosschecked my firewall to see if there is a restriction, but all of my relevant local hosts are allowed to send/receive packets to/from CERN port 80.

My connection was from London, so not inside the CERN network.

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About half a hour ago my running VMs started to pull lots of CVMFS data from cvmfs02.grid.sinica.edu.tw.
According to my geolocation this is very unlikely as that server is on position 5 of the CVMFS configuration.
I wonder if this situation points out a major network problem affecting a couple of CVMFS locations.

Mine are still trying... and not getting very far.

ACCESSED SITE....................CONNECT........BYTES......TIME.......USERS

cvmfs02.grid.sinica.edu.tw.......64....................0...............0:06:01....10

Mine are still trying... and not getting very far.

ACCESSED SITE....................CONNECT........BYTES......TIME.......USERS

cvmfs02.grid.sinica.edu.tw.......64....................0...............0:06:01....10

Ah, well, the sinica port problem.

According to the CVMFS documentation, stratum 1 systems should listen to both TCP ports, 80 and 8000.
http://cvmfs.readthedocs.io/en/stable/cpt-replica.html

cvmfs02.grid.sinica.edu.tw is one of those stratum 1 systems, but

nc -w 5 -z -v cvmfs02.grid.sinica.edu.tw 80 -> test to port 80 failes
nc -w 5 -z -v cvmfs02.grid.sinica.edu.tw 8000 -> test to port 8000 succeeds

This is not critical for normal operation as the other stratum 1 servers will respond, but if cvmfs02.grid.sinica.edu.tw is the only system left online for failover, it will become a problem.

I pointed that out several times on the old lhc@home MB but it seems that the comments never reached the responsible admins.