CXCDC-44199 Fix SNI mismatch when using HTTPS proxy CONNECT tunnel - #42
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CXCDC-44199 Fix SNI mismatch when using HTTPS proxy CONNECT tunnel#42estira wants to merge 1 commit into
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When routing through an HTTPS proxy, self.host holds the proxy address and self._tunnel_host holds the real destination. Using self.host as SNI causes SSLV3_ALERT_HANDSHAKE_FAILURE on servers that enforce strict SNI validation (Zero Trust gateways, CloudFront). Fall back to self.host only when no tunnel is active (direct connections are unaffected).
shemma3
approved these changes
Aug 9, 2026
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When routing through an HTTPS proxy, self.host holds the proxy address and self._tunnel_host holds the real destination. Using self.host as SNI causes SSLV3_ALERT_HANDSHAKE_FAILURE on servers that enforce strict SNI validation (Zero Trust gateways, CloudFront). Fall back to self.host only when no tunnel is active (direct connections are unaffected).