Hi guys I have been helping a site attempt to get their Access Grid up and running, in which I have stumbled across a couple of issues that I hope someone could possibly assist with.
Firstly, let me state that I suspect the issue is related to either the firewall and/or being behind a NAT network. System information for AG Node * Single AG node running Windows XP * Windows firewall turned off * AG 3.2 * Unicast only * Connected to a NAT network Initially the problem was that the site couldn't see any other sites connected in various venues. Anyway, after some testing, we found that if the site was transmitting audio, it would then be able to receive audio. (This was in the APAG lobby). We also found that if the site was running a consumer process only, the site would not receive any video in "vic". After plugging in a USB webcam, and running both a video consumer and video producer, everyone else's video would then appear, but only in the producer service only (therefore had to un-mute the streams). Another interesting thing that occurred is that when using a video service only, no incoming video could be received (whether transmitting or not). Therefore we had to run the other 2 services to receive video from other sites. Also, if we moved to a different Virtual Venue, audio would stop receiving... The participants would be listed, but incoming would always be 0.0 b/s. Transmission was fine! Note, that we tried various unicast bridges and the same issues would occur! Now the site is behind a corporate firewall running IPTables, with ports 50000-52000 open for both udp and tcp for input. Given that it works perfectly in the APAG lobby, one would assume that the firewall is "sorta" configured correctly, otherwise it wouldn't work at all. I initially though it might be a "Stateful" firewall issue, but now I am beginning to think the issue is more likely a Nat issue. Therefore, my question is, has anyone else seen similar issues and what did you have to do to resolve the problem? * Did you have to do some special type of packet forwarding? Unfortunately, the site I am assisting is nearly 2000 klm's away, but if you have any advice, I would greatly appreciate it. Thanks very much for your time, Jason. -------------------------------------------- Jason Bell, B.I.T. (Honours) Research Systems Support Officer Information Technology Division CQ University Australia Australian Research Collaboration Service http://www.arcs.org.au/ E-mail : j.b...@cqu.edu.au jason.b...@arcs.org.au Work : +61 7 4930 9229 Mobile : 0409 630897 Postal : Building 19 Central Queensland University Bruce Highway Rockhampton, Queensland, Australia, 4702 -------------------------------------------- Patience is a virtue. But if I wanted Patience, I would have become a Doctor. --------------------------------------------
