IPv4で接続したのか、それともIPv6で接続したのかは、あなたのIPアドレスを示すREMOTE_ADDRの項で判別できます。
REMOTE_ADDR: 18.116.86.134 (AF_INET) REMOTE_HOST: REMOTE_PORT: 56436 SERVER_PROTOCOL: HTTP/1.1 REQUEST_METHOD: GET REQUEST_URI: /yousentme.php QUERY_STRING: HTTP_ACCEPT: */* HTTP_ACCEPT_CHARSET: HTTP_ACCEPT_ENCODING: gzip, br, zstd, deflate HTTP_ACCEPT_LANGUAGE: HTTP_CONNECTION: HTTP_HOST: katsu.watanabe.name HTTP_REFERER: HTTP_USER_AGENT: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) REQUEST_TIME_FLOAT: 1734847289.0614 (2024-12-22T15:01:29+09:00)