Re:It is always the DNS
by NavinF on Friday December 03, 2021 @05:39AM
(#29428550)
130-140ms!? That’s very unusual. Can you reproduce that latency with UDP ping to a cloud VM or a DNS request to a cloud VM?
Maybe your router or ISP is messing with UDP or intercepting DNS and forcing you to use their DNS servers. Lots of “firewall” middleboxes do that by default. Or maybe there’s an path MTU issue that triggers retransmit on every UDP packet, but not on an established TCP connection that has learned the correct MTU.
Maybe your router or ISP is messing with UDP or intercepting DNS and forcing you to use their DNS servers. Lots of “firewall” middleboxes do that by default. Or maybe there’s an path MTU issue that triggers retransmit on every UDP packet, but not on an established TCP connection that has learned the correct MTU.