shinrich commented on a change in pull request #7622:
URL: https://github.com/apache/trafficserver/pull/7622#discussion_r602368705
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File path: doc/admin-guide/files/records.config.en.rst
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@@ -3717,6 +3717,13 @@ Client-Related Configuration
Enables (``1``) or disables (``0``) TLSv1_3 in the ATS client context. If
not specified, enabled by default
+.. ts:cv:: CONFIG proxy.config.ssl.client.alpn_protocol STRING ""
+
+ Set the alpn string that ATS will send to origin during new connections.
By default no ALPN string will be set.
+ To enable HTTP/2 communication to the origin, set this to "h2,http1.1".
Review comment:
Good questions. I kept it empty by default so the initial integration
would have less impact. Of course, there are enough other code changes that
landing this PR potentially have an impact even if you don't set the ALPN
strings.
We need to have a more general discussion about the preferred order, etc.
Should probably look how other similar proxies handle this.
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