I have Verizon DSL and a Verizon provided Westell 327W DSL router/modem. It doesn't much like BitTorrent. BitTorrents die quickly, my internet connection locks up, I get a report of eth0 going down, all sorts of problems. If I test the incoming port in Transmission it says the port is closed or it locks up the modem (and occasionally the computer).
I went to a site that checks if the ISP is throttling BitTorrent, and it reported there was no sign of throttling. The real clincher, though, is that if I totally disable the router's hardware firewall BitTorrent usually works OK. So it seems to me that the culprit is the Westell.
If I enable the firewall, at almost any setting, everything I use, other than BitTorrent, works just fine. So I'd like to have it enabled, but I just can't figure out how to get it to allow BitTorrent to pass.
Does anybody here use a Westell 327W DSL router/modem and BitTorrent?