# Possible to playback HTTP/2 with upstream cert sniffing disabled (upstream\_cert=false)

**URL:** <https://discourse.mitmproxy.org/t/possible-to-playback-http-2-with-upstream-cert-sniffing-disabled-upstream-cert-false/1394>\
**Category:** help\
**Created:** [January 21, 2019, 5:27pm UTC](https://discourse.mitmproxy.org/t/possible-to-playback-http-2-with-upstream-cert-sniffing-disabled-upstream-cert-false/1394 "2019-01-21T17:27:26Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![andrewMoz](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mitmproxy.org/andrewmoz/32/387_2.png) [@andrewMoz](https://discourse.mitmproxy.org/u/andrewMoz)\
**Post date:** [January 21, 2019, 7:41pm UTC](https://discourse.mitmproxy.org/t/possible-to-playback-http-2-with-upstream-cert-sniffing-disabled-upstream-cert-false/1394/2 "2019-01-21T19:41:45Z")

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Reading up on how ALPN is implemented (in the TLS handshake), my question becomes,  
“Is there any way that I can record the server’s choice of h2 as the protocol in the mitmdump session recording?”

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_[View the full topic](https://discourse.mitmproxy.org/t/possible-to-playback-http-2-with-upstream-cert-sniffing-disabled-upstream-cert-false/1394)._