> Make sure to check documentation https://clickhouse.com/docs/en/ first. If the question is concise and probably has a short answer, asking it in Telegram chat https://telegram.me/clickhouse_en is probably the fastest way to find the answer. For more complicated questions, consider asking them on StackOverflow with "clickhouse" tag https://stackoverflow.com/questions/tagged/clickhouse 

> If you still prefer GitHub issues, remove all this text and ask your question here.

`            <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`
{
    if (boost::iequals(name, "localhost"))
        local_host = false;
    else
        boost::range::remove_erase(names, name);
}
void AllowedClientHosts::addNameRegexp(const String & name_regexp)
{
    if (boost::iequals(name_regexp, "localhost"))
        local_host = true;
    else if (name_regexp == ".*")
        any_host = true;
    else if (boost::range::find(name_regexps, name_regexp) == name_regexps.end())
        name_regexps.push_back(name_regexp);
}
void AllowedClientHosts::removeNameRegexp(const String & name_regexp)
{
    if (boost::iequals(name_regexp, "localhost"))
        local_host = false;
    else if (name_regexp == ".*")
        any_host = false;
    else
        boost::range::remove_erase(name_regexps, name_regexp);
}
void AllowedClientHosts::addLikePattern(const String & pattern)