On 04/21/2015 06:30 AM, Toke Høiland-Jørgensen wrote:
Right, so there's definitely something messing with the outgoing traffic. I have no idea what could cause netperf to only be able to send traffic in one direction (perhaps Rick knows?). Do you have any sort of firewall between you and the internet that might interfere with traffic?
Firewall is the first thing that comes to mind. Second would be some sort of PathMTU discovery black-hole.
One way to check for that would be to run a TCP_RR test and see if that "works." If it gets a non-zero result, it suggests an issue with large segments (the netperf default request and response size being one byte...). If it gets a zero result, it suggests something else like perhaps firewall.
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