HN meta: 99% packet loss on news.ycombinator.com
3 eqvinox 3 8/21/2025, 1:47:08 PM
I'm currently seeing >99% packet loss to news.ycombinator.com (2606:7100:1:67::26):
13. br06-te1-2.lwdc.americanis.net 0.0% 231 14.3 17.2 14.0 172.5 19.5
14. sdtc.sd-me01.te0-1.host1.20546.americanis.net 99.6% 231 12.9 12.9 12.9 12.9 0.0
15. 2606:7100:1:67::26 99.1% 231 11.8 11.8 11.8 11.8 0.0
IPv4 seems to be unaffected.
Are you seeing TCP retransmits to port 443?
Do that at the same time as watching It would be most useful to do this from your location and also from VM's on a few different providers in different locations to find which thing is not like the other. The 'nc' I am using is part of the nmap distribution. To force IPv6 replace the name with the IPv6 address.This doesn't generally apply to the end host; note the last hop in the trace I posted is the web server itself. Also, the second last hop having very similar loss% makes it likely that neither of the two systems is hitting rate limits (as they would be different).
> Are you seeing TCP retransmits to port 443?
If the webpage loaded normally, I wouldn't have investigated to begin with ;).
Right now, the loss on TCP SYNs is about 70%. (mtr -T -P 443) Second to last hop still has roughly the same loss. Something's h0rked at americanis.net.
Outside of HN I suppose you could check the Nanog mailing lists [1] and chat servers to see if there is any discussion ongoing for those networks.
[1] - https://lists.nanog.org/mailman3/