有关Clickhouse中remote_url_allow_hosts配置项端口的说明

 <!--<remote_url_allow_hosts>-->
        <!-- Host should be specified exactly as in URL. The name is checked before DNS resolution.
            Example: "yandex.ru", "yandex.ru." and "www.yandex.ru" are different hosts.
                    If port is explicitly specified in URL, the host:port is checked as a whole.
                    If host specified here without port, any port with this host allowed.
                    "yandex.ru" -> "yandex.ru:443", "yandex.ru:80" etc. is allowed, but "yandex.ru:80" -> only "yandex.ru:80" is allowed.
            If the host is specified as IP address, it is checked as specified in URL. Example: "[2a02:6b8:a::a]".
            If there are redirects and support for redirects is enabled, every redirect (the Location field) is checked.
            Host should be specified using the host xml tag:
                    <host>yandex.ru</host>
        -->


        <!-- Regular expression can be specified. RE2 engine is used for regexps.
            Regexps are not aligned: don't forget to add ^ and $. Also don't forget to escape dot (.) metacharacter
            (forgetting to do so is a common source of error).
        -->
    <!--</remote_url_allow_hosts>-->

<remote_url_allow_hosts>
    <host>yandex.ru</host>
</remote_url_allow_hosts>

<remote_url_allow_hosts>
    <host>yandex.ru:80</host>
</remote_url_allow_hosts>

<remote_url_allow_hosts>
    <host>192.168.1.1</host>  <!-- 允许 192.168.1.1 的所有端口 -->
    <host>192.168.2.1:8080</host>  <!-- 只允许 192.168.2.1:8080 -->
</remote_url_allow_hosts>

<remote_url_allow_hosts>
    <host>[2001:db8::1]</host>  <!-- 允许 [2001:db8::1] 的所有端口 -->
    <host>[2001:db8::1]:8080</host>  <!-- 只允许 [2001:db8::1]:8080 -->
</remote_url_allow_hosts>