What proxy_pass protocols are there?

With proxy_pass in nginx I can use either:

proxy_pass http://backend; proxy_pass https://backend; 

the question is: What protocols can I use? In particular I'd like to use HTTP-2 over cleartext (h2c). Is this possible? Is there a list of protocols I can use with proxy_pass?

2 Answers

Answers 1

Only http and https are permitted, as specified in the docs. Nginx does not support http2 when acting as a proxy.

Instead, you can use nghttp2 which does support http2 over cleartext (with the option proto=ht to the --backend argument).

Answers 2

According to the source it only allows http and https protocols.

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