Using this configuration: BalancerMember h2c://php73-a:443 hctemplate=serverstatus-php-v3 route=php73-a timeout=180 flushpackets=on BalancerMember h2c://php73-b:443 hctemplate=serverstatus-php-v3 route=php73-b timeout=180 flushpackets=on BalancerMember h2c://php73-c:443 hctemplate=serverstatus-php-v3 route=php73-c timeout=180 flushpackets=on ProxyHCTemplate serverstatus-php-v3 hcmethod=GET hcuri=/serverstatus-v2.php?waf-3 hcinterval=5 hcfails=4 hcpasses=2 hcexpr=goodstatus mod_proxy_hcheck is unable to test the backend and the server state reamains in "HcFl" status. mod_proxy_hcheck should be patched to support h2 backend or - at minimum - enable the SSL support in hc_get_backend when h2c is set as backend protocol and a valid port is configured, even if the check is performed with HTTP/1.0.