docs/back/configuration.en.md

Configuration reference

This document describes the ServNest configuration directives that are part of config.ini (distributed as config.template.ini). It's an INI file, parsed by PHP's parse_ini_file function. Every directive is expected to be present.

[common]

public_domains[]

Allowed server names. Used to make the authentication tokens specific to the service.

You can specify multiple domains:

public_domains[] = "servnest.example"
public_domains[] = "4example4example4example4example4example4example4example.onion"

prefix

Path that is prepended to the HTTP root where the service can be reached. Used for redirections and emitting cookies.

If the service answers at https://servnest.example/servnest/, you need to set prefix = "/servnest".

service_name

String defining the displayed identity of the service.

service_emoji

Pretty string sometimes prefixed to the service name. Can be empty.

about_url

Address of the service presentation page.

services[]

Keys auth, reg, ns and ht are required.

Values can be:

• enabled: The service is provided as usual.
• no-registration (auth only): Same as enabled, but no new account can be created.
• error: For maintenance/debugging purposes, the service is temporarily unavailable. When used on the auth service, users can't submit any form, but this doesn't prevent already logged in SFTP users to act on the filesystem.
• disabled (reg, ns and ht only): The service is ignored everywhere, this installation never provides it.

[dns]

This configuration section is used by both the registry (reg) and the public name server (ns).

knotc_path

Filesystem path to the knotc binary.

kdig_path

Filesystem path to the kdig binary. Used to authenticate resources possession using the DNS.

[reg]

suffixes[]

Lists the suffixes that the registry manages.

The key is the suffix (ending with a dot) and the value is its registration availability, which can be one of the following:

• all: every account can register
• approved: only approved accounts can register
• none: nobody can register

This impacts only new registrations, existing domains can always be managed by users if their suffix appears in the list.

suffixes_path

Filesystem path to the registries directory. The full path to the registry zonefile is suffixes_path + / + suffixes (as defined in suffixes[]) + zone.

ttl

The TTL of every DNS record created by users (i.e. NS, DS and glue records).

address

Host where the Knot DNS server answers the registry values. Should be a secure (local) address, as answers are not authenticated.

(Used to check the transfer authentication records.)

[ns]

knot_zones_path

Filesystem path to the zones directory. The full path to created zonefiles will be knot_zones_path/<zone-apex-domain>.zone.

servers[]

The first element is set as the primary server in the SOA when creating a zone.

All elements are used as NS records for newly created zones and listed in the interface so users can know what NS records must be delegated from the registry.

The script jobs/ns-update.php may be run after updating this setting to update NS records for already created zones.

kzonecheck_path

Filesystem path to the kzonecheck binary. Used to check sent plaintext zonefiles.

public_soa_email

Administrator email address published in every SOA record. Ends with a ., @ is replaced by a ., an hypothetical . in the first part of the address is escaped using a \ before, thus contact.admin@servnest.example becomes contact\.admin.servnest.example.

local_only_check

Check for records on the local registry name server when adding a zone.

Development feature, should not be enabled for a public server.

[ht]

ht_path

Apache can be chrooted to this directory.

<ht_path>/fs/<internal-user-id>/ is the users files base directory.

<ht_path>/uri/<address>/ is automatically reachable by Apache (using mod_vhost_alias) and contains relative symlinks to users managed directories.

user_quota_testing, user_quota_approved

Maximum bytes a user can use on its SFTP space, depending on its account type.

subpath_domain and subpath_path

For the feature of sites in subpathes of a single domain:

subpath_domain is the said shared domain, displayed in the interface

subpath_path is the filesystem path to the directory whose address is the HTTP root of subpath_domain

https://<subpath_domain>/example/ maps to <subpath_path>/example/

subdomain_domain and subdomain_path

For the feature of sites in subdomains of a root domain:

(The root domain must have a wildcard TLS certificate and wildcard AAAA and A records.)

subdomain_domain is the root domain, displayed in the interface

subdomain_path is the filesystem path to the directory whose direct subdirectories are mapped to direct subdomains of subdomain_domain

https://example.<subdomain_domain>/ maps to <subdomain_path>/example/

tor_config_path

Filesystem path to the directory containing Tor configuration for onion accesses. The full Tor configuration file path is tor_config_path/<internal-user-id>/<site-dir-name>

tor_keys_path

Tor sets up keys inside the directory tor_keys_path/<internal-user-id>/<site-dir-name>/

tor_user

Linux user as who runs the Tor daemon. Some commands are executed as this user through sudo.

tor_reload_cmd

Command to execute through sudo to reload the Tor daemon.

onion_internal_host

HTTP Onion services listen on port 80 and forward requests to this host.

sudo_path

Filesystem path to the sudo binary.

certbot_path

Filesystem path to the certbot binary. It is used through sudo to get a Let's Encrypt certificate.

chgrp_path, cat_path, rm_path, mkdir_path

Filesystem paths to the corresponding GNU coreutils binary (other implementations are not tested). (Their PHP counterpart can't be used as they need to act as another user through sudo.)

sftpgo_group

Linux group as who runs SFTPGo. (Gets full permissions on users directories.)

sftpgo_user

Linux user as who runs SFTPGo. (Used to delete files that users created.)

cname

For a site with dedicated domain, the domain that users must point their domain to.

This domain should have the following records:

AAAA

ipv6_address

A

ipv4_address

CAA

caa_account_uris[testing]

CAA

caa_account_uris[approved]

ipv6_address, ipv4_address

For a site with dedicated domain, when manually copying records, public IPv6 and IPv4 addresses that users must set in their AAAA and A records.

Should be the same as the AAAA and A records for cname.

caa_account_uris[]

For a site with dedicated domain, when manually copying records, the URIs of the accounts (both stable and staging) that request Let's Encrypt certificates. Keys testing and approved must be set to outputs of respectively certbot show_account --test-cert and certbot show_account

Should be the same as the CAA records for cname.

sftp_pub

Filesystem path to where the public key of the SFTP service is available.

sftp_fp

Filesystem path to where the public key fingerprint of the SFTP service is available.

sftp_asciiart

Filesystem path to where the ASCII art of the public key of the SFTP service is available.

sftp_domain

Domain name that users need to direct their SFTP clients to. May be the same key as in public_domains[].

public_sftp_port

Network port that users need to direct their SFTP clients to. The common default port is 22.

[check]

This configuration section is used only when running check.php.

https_port

Port where the public nginx reverse proxy can be reached. Usually 443 for production.

sftp_path

Filesystem path to the sftp binary.

sshpass_path

Filesystem path to the sshpass binary.

tor_proxy

Curl's CURLOPT_PROXY argument, used to test onion services.