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Ask HN: WireGuard Traffic Under Load

1 points by sushidev ↗ HN
Hey, I had my wireguard connection really slow while other stuff worked relatively ok today so calling the isp I was told that possibly it’s related to a new fortnite release. How common for you to experience drastic slowdown of wireguard or other udp traffic when your isp is under load?

5 comments

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pwg
If you have cable (i.e., Comcast/Cox) then your internet is shared with some number (how many depends upon exactly how the cable company set things up) of your neighbors, and if enough of them are using up the bandwidth, you will see your own connection slow down.
sushidev
Yeah. But I observed udp wg traffic 10 times slower. So I would like to know if it’s a known phenomenon to have udp traffic put on serious throttle?
pwg
Ten times slower than what?

A relative statement, without an indication of what you are measuring against, is of no value.

sushidev
Ten times slower than other types of traffic such as tcp
pwg
At the same time?

Then that does sound like your ISP may be de-prioritizing UDP data, or specifically throttling UDP flows to some level 10x smaller than your full bandwidth.

Are you sure, however, that the other end of the VPN connection is not where the slowdown is happening? If that end was the choke-point, you'd still see slower traffic but your ISP would not be the reason.