When {project_name} communicates with external services or has an incoming connection through TLS, it has to validate the remote certificate in order to ensure it is connecting to a trusted server. This is necessary in order to prevent man-in-the-middle attacks.
The certificates of these clients or servers, or the CA that signed these certificates, must be put in a truststore. This truststore is then configured for use by {project_name}.
The existing Java default truststore certs will always be trusted. If you need additional certificates, which will be the case if you have self-signed or internal certificate authorities that are not recognized by the JRE, they can be included in the `conf/truststores` directory or subdirectories. The certs may be in PEM files, or PKCS12 files with extension `.p12`, `.pfx`, or `.pkcs12`. If in PKCS12, the certs must be unencrypted - meaning no password is expected.
If you need an alternative path, use the `--truststore-paths` option to specify additional files or directories where PEM or PKCS12 files are located. Paths are relative to where you launched {project_name}, so absolute paths are recommended instead. If a directory is specified, it will be recursively scanned for truststore files.
After all applicable certs are included, the truststore will be used as the system default truststore via the `javax.net.ssl` properties, and as the default for internal usage within {project_name}.
It is still possible to directly set your own `javax.net.ssl` truststore System properties, but it's recommended to use the `--truststore-paths` instead.
* `DEFAULT` (the default) allows wildcards in subdomain names (e.g. *.foo.com) to match names with the same number of levels (e.g. a.foo.com, but not a.b.foo.com) - with rules and exclusions for public suffixes based upon https://publicsuffix.org/list/
* `WILDCARD` (deprecated) allows wildcards in subdomain names (e.g. *.foo.com) to match anything, including multiple levels (e.g. a.b.foo.com). Use DEFAULT instead.
* `STRICT` (deprecated) allows wildcards in subdomain names (e.g. *.foo.com) to match names with the same number of levels (e.g. a.foo.com, but not a.b.foo.com) - with some limited exclusions. Use DEFAULT instead.
