nginx reports [upstream sent no valid HTTP/1.0 header] when used with varnish

Lukas Tribus luky-37 at
Tue Apr 22 08:55:53 UTC 2014

> Hello Lukas, 
> I have just checked and found nothing 
> # tcpdump -vv port 6082 
> tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 
> 65535 bytes 

Fix your capture.

- capture the traffic on loopback, not eth0
- don't truncate packets (-s 0)
- write in a cap file, tcpdump output is not very helpful

$ tcpdump -i lo -s0 -w tcp6082-traffic.cap port 6082



More information about the nginx mailing list