Using NIEeS Access Grid Services

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NIEeS is running both Access Grid 2.4 and 3.0 servcies.

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Access Grid 2.4

NIEeS is providing three AG2.4 venues at the Access Grid Support Centre (AGSC), Manchester, and one at the Department of Earth Sciences, University of Cambridge.

  • AGSC Venues
    • NIEeS-1 https://ag2server.ag.manchester.ac.uk:8000/Venues/0000010a2151ca2e00c0009600b8005ae14
    • NIEeS-2 https://ag2server.ag.manchester.ac.uk:8000/Venues/0000010a2c2c677200c0009600b8005ae3b
    • NIEeS-3 https://ag2server.ag.manchester.ac.uk:8000/Venues/0000010a2c2e42d500c0009600b8005a538
  • Cambridge Venue
    • NIEeS-ESC-Cambridge https://agorilla.niees.group.cam.ac.uk:8000/Venues/0000010a84722def008000e800e80029595


NIEeS is also providing Bridge Services for those who do not have a multicast enabled network.

  • Bridge Server (AG2.4): bridge.escience.cam.ac.uk

In order to use this bridge, please open ports 30000-30011 tcp for your firewall.

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Access Grid 3.0.1

NIEeS is running an AG 3.0.1 Venue Server for people to use.

  • Cambridge Venues
    • NIEeS-AG3.0.1 https://agiraffe.niees.group.cam.ac.uk:8000/Venues/80e8e82a0bc83cdf1c1be5a22b481a83
    • AG 3.0.1 Bridge Server agiraffe.niees.group.cam.ac.uk


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AG Connector

AG Connector is a solution for multicast connectivity problems of Access Grid. It can be thought of as a next generation Bridge. AG Connector solves the problem where AG cannot run behind a network address translation (NAT) server, or firewall. AG Connector provides multicast connectivity between users using a UDP Multicast tunneling protocol. Only port 8010 UDP needs to be open on your firewall.

Download it from http://ace.nm.gist.ac.kr/AG_Connector/download/AG_Connector-0.5.zip


The AG Connector zip file includes. 

Umtp_win32.exe
Umtp_linux
AGConnector.py
Ptheread.dll


Installation of AG Connector is pretty simple. One can run the following commands: 

agpm.py –z AG_Connector.zip

The concept of the AG connector can be seen as following figure. Description

Currently, NIEeS is deploying a UMTP server at agorilla.niees.group.cam.ac.uk and testing AG Connector on a wireless network using private IP addresses, and also on a network that blocks multicast.

To start it is straight forward. One can using “Start Application Session” > AG Connector. Description Description

Then open AG Connector from Application Sessions, you will be able to see AG Connector window. Description


Then, from the file> UMTP server> you can chose the UMTP server, in this case, it is agorilla.niees.group.cam.ac.uk Description


Now, you should be able to got multicast packets even you are in the private IP address behind the NAT.

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