Open the TCP/UDP ports as per the instructions in the following link, this will fix the issues for 90% of people (it has for everyone I know)
http://www.bungie.net/en/Help/Article/11930
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Im on ps4 I forwarded the ports In the article and i got my Nat to type 2 as Sony recommends and I'm still receiving beavers all over the place.
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Port forwarding doesn't work for a lot of people. As in we get it done but nothing changes. We still keep getting booted every 10 minutes.