said by taraf:^This
I have used Netflix on DSL for over a year without problems. That was straight up DSL, with an Alcatel SpeedTouch Home modem on a 7meg profile, later replaced with a TP-Link TP8616 on a 16meg profile, and a TP-Link TR1043ND router. I was not using a subnet or static IP because I don't have use for it. (nothing I do need reverse IP lookup for can't be done without dyndns).
Try doing a traceroute instead of a ping... it'll give you more useful information, such as *where* the problem actually exists.