Thanks for responding @sdayman and sorry for my delayed response.
The trace output is:
uag=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36
I haven’t had a chance to deploy a service in an Argo Tunnel where I can log/verify the current value of the header. Maybe this’ll help:
- cloudflared image:
- backend image:
node:14.15.1-alpine; app running on fastify v3
- proxied through:
Nothing had changed in the deployment environment - no new deployments or restarts. The header’s value just abruptly changed. It might also be worth noting that the first error we saw had the header value as an IPv6 address, also duplicated, and then subsequent errors had IPv4 addresses, duplicated.