clash/docs/configuration/getting-started.md

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Getting Started	2

Getting Started

It's recommended that you read the Introduction before proceeding. After you have a brief understanding of how Clash works, you can start writing your own configuration.

Configuration Files

The main configuration file is called config.yaml. By default, Clash reads the configuration files at $HOME/.config/clash. If it doesn't exist, Clash will generate a minimal configuration file at that location.

If you want to place your configurations elsewhere (e.g. /etc/clash), you can use command-line option -d to specify a configuration directory:

clash -d . # current directory
clash -d /etc/clash

Or, you can use option -f to specify a configuration file:

clash -f ./config.yaml
clash -f /etc/clash/config.yaml

Special Syntaxes

There are some special syntaxes in Clash configuration files, of which you might want to be aware:

IPv6 Addresses

You should wrap IPv6 addresses in square brackets, for example:

[aaaa::a8aa:ff:fe09:57d8]

DNS Wildcard Domain Matching

In some cases, you will need to match against wildcard domains. For example, when you're setting up Clash DNS, you might want to match against all subdomains of localdomain.

Clash do offer support on matching different levels of wildcard domains in the DNS configuration, while the syntaxes defined below:

::: tip Any domain with these characters should be wrapped with single quotes ('). For example, '*.google.com'. Static domain has a higher priority than wildcard domain (foo.example.com > *.example.com > .example.com). :::

Use an asterisk (*) to match against a single-level wildcard subdomain.

Expression	Matches	Does Not Match
*.google.com	www.google.com	google.com
*.bar.google.com	foo.bar.google.com	bar.google.com
*.*.google.com	thoughtful.sandbox.google.com	one.two.three.google.com

Use a dot sign (.) to match against multi-level wildcard subdomains.

Expression	Matches	Does Not Match
.google.com	www.google.com	google.com
.google.com	thoughtful.sandbox.google.com	google.com
.google.com	one.two.three.google.com	google.com

Use a plus sign (+) to match against multi-level wildcard subdomains.

+ wildcard works like DOMAIN-SUFFIX, you can quickly match multi level at a time.

Expression	Matches
+.google.com	google.com
+.google.com	www.google.com
+.google.com	thoughtful.sandbox.google.com
+.google.com	one.two.three.google.com