Hi- ERROR_TCP_MISS_502 (Bad Gateway) typically means ATS cannot connect to the origin server. Since you can retrieve content with wget on the mids, this could be a mismatch in configuration somewhere. Double check parent.config and remap.config.
If still not working, you could try running a tcpdump on one of the caches to see where trafficserver is attempting to send the traffic to. --ERic On Sat, Oct 14, 2023 at 6:02 AM amirhossein ramezan < amirhosseinrame...@yahoo.com> wrote: > Unfortunately, I encountered a strange problem. Please guide me if anyone > can help. I made a new DS, but I can't get any of the origin content with > the cdn link. and edge and mid show error 400. If the content can be > received with wget on both mid and edge servers. Could it be for http > headers? I will also send the headers below. The log displayed in mid for > not receiving content is ERROR_TCP_MISS 502 > [image: Inline image] > What could be the reason and what should I check? > > *Best Regards* > *Amirhossein Ramezan* > *Technical Project Manager* > > >
