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`            <networks incl="networks" replace="replace">
                <ip>127.0.0.1</ip>
                <host_regexp>^abc00[1-6]$</host_regexp>
            </networks>
`
`clickhouse-client --host abc003
ClickHouse client version 22.8.2.11 (official build).
Connecting to abc003:9000 as user default.

If you have installed ClickHouse and forgot password you can reset it in the configuration file.
The password for default user is typically located at /etc/clickhouse-server/users.d/default-password.xml
and deleting this file will reset the password.
See also /etc/clickhouse-server/users.xml on the server where ClickHouse is installed.

Code: 516. DB::Exception: Received from abc003:9000. DB::Exception: default: Authentication failed: password is incorrect or there is no user with such name. (AUTHENTICATION_FAILED)`


`if use <host> no problem`
const String & pattern, std::optional<IPSubnet> & subnet, std::optional<String> & name, std::optional<String> & name_regexp)
    {
        
        size_t first_not_digit = pattern.find_first_not_of("0123456789");
        if ((first_not_digit != String::npos) && (first_not_digit != 0) && (pattern[first_not_digit] == '.'))
        {
            parseLikePatternIfIPSubnet(pattern, subnet.emplace(), IPAddress::IPv4);
            return;
        }
        size_t first_not_hex = pattern.find_first_not_of("0123456789ABCDEFabcdef");
        if (((first_not_hex == 4) && pattern[first_not_hex] == ':') || pattern.starts_with("::"))
        {
            parseLikePatternIfIPSubnet(pattern, subnet.emplace(), IPAddress::IPv6);
            return;
        }
        bool has_wildcard = (pattern.find_first_of("%_") != String::npos);
        if (has_wildcard)
        {
            name_regexp = likePatternToRegexp(pattern);
            return;
        }
        name = pattern;
    }
}
void AllowedClientHosts::IPSubnet::set(const IPAddress & prefix_, const IPAddress & mask_)