arti 2.1.0

# (Built-in defaults for the arti configuration format.)
# (This is an example file you can use as a template or as documentation.)

# Rules about how arti should behave as an application
[application]
# If true, we should watch our configuration files for changes.
#
# (Note that this feature may misbehave if you change symlinks in the
# paths to the directory holding the configuration files, if you
# remove and recreate those directories, or if those directories
# change for some other reason.)
#watch_configuration = false

# If true, we should allow other processes run by the same user to inspect this
# process's memory.
#
# (By default, assuming arti has been built with the `harden` feature flag, we
# take what step we can, including disabling core dumps, to keep its memory and
# state secret from other processes.)
#
#permit_debugging = false

# Set up the Arti program to run as a proxy.
[proxy]
# Default port to use when listening to SOCKS connections.  We always
# listen on localhost.
#
# Note that only one process can listen on a given port at a time.
#socks_listen = 9150

# Port to use to listen for DNS requests.  0 means disabled.
#dns_listen = 0

# Configure logging
[logging]

# Specify filtering directives for sending trace messages to the console
# (via standard output).
#
# It can be as simple as a single loglevel, or as complicated as a
# list with per-module settings.
#
# You can override this setting with the -l, --log-level command-line option.
#
# Example:
#     trace_filter = "info,tor_proto::channel=trace"
#
# For more information, see https://docs.rs/tracing-subscriber/0.2.20/tracing_subscriber/filter/struct.EnvFilter.html
#console = "info"

# As above, but specify filtering directives for sending trace messages to 
# the journald logging system.  Empty string means not to use journald.
#journald = ""

# You can also configure one or more log files, with different filters, and optional
# rotation.
#
# For example (not the default):
#files = [
#         {path = "~/logs/debug.log", filter="debug"},
#         {path = "~/logs/trace.log", filter="trace", rotate="daily"},
#]

# Whether to log sensitive information (such as target hostnames and ip addresses)
#
# If set to `false` (the default), such information is not logged in messages of
# level `info` or higher.
#log_sensitive_information = false

# Locations to use for storing things on disk.
#
# These paths can use ~ to indicate the user's home directory, or a set
# of shell-style variables to indicate platform-specific paths.
#
# Supported variables are ARTI_CACHE, ARTI_CONFIG, ARTI_SHARED_DATA,
# ARTI_LOCAL_DATA, and USER_HOME.
#
# Multiple processes can share the same cache_dir.  If they do, one of them
# will download directory information for all of the others.
#
# The state directory is not yet used.
[storage]
#cache_dir = "${ARTI_CACHE}"
#state_dir = "${ARTI_LOCAL_DATA}"

# Describe how to enforce permissions on the filesystem when accessing the cache
# and state directories.  (This does not apply to configuration files) 
[storage.permissions]
# If set to true, we ignore all filesystem permissions.
#dangerously_trust_everyone = false

# What user (if any) is trusted to own files and directories?  ":current" means
# to trust the current user.
#trust_user = ":current"

# What group (if any) is trusted to have read/write access to files and
# directories?  ":selfnamed" means to trust the group with the same name as the
# current user, if that user is a member.
#trust_group = ":username"

# If set, gives a path prefix that will always be trusted.  For example, if this
# option is set to "/home/", and we are checking "/home/username/.cache", then
# we always accept the permissions on "/" and "/home", but we check the
# permissions on "/home/username" and "/home/username/.cache".
# 
# (This is not the default.)
#
#     ignore_prefix = "/home/"
#ignore_prefix = ""

# Replacement values for consensus parameters.  This is an advanced option
# and you probably should leave it alone. Not all parameters are supported.
# These are case-sensitive.
#
[override_net_params]
# For example (not the defaults):
#     circwindow = 1000
#     min_paths_for_circs_pct = 60

# Configuration for timing when and how often we should download directory
# information.
#
# We use a randomized algorithm for determining when to retry. With
# the various retry_* options, "num" is the number of downloads to
# attempt, and "initial_delay" is a parameter determining both our
# _first_ delay before we reattempt, and our _minimum_ delay for
# subsequent attempts.
[download_schedule]

# How to retry our initial bootstrapping when we're trying to start up.
#retry_bootstrap = { attempts = 128, initial_delay = "1 sec", parallelism = 1 }

# How to retry a single consensus download.
#retry_consensus = { attempts = 3, initial_delay = "1 sec", parallelism = 1 }

# How to retry a set of authority certificate downloads.
#retry_certs = { attempts = 3, initial_delay = "1 sec", parallelism = 1 }

# How to retry a set of microdescriptor downloads.
#retry_microdescs = { attempts = 3, initial_delay = "1 sec", parallelism = 4 }

# Information about how premature or expired our directories are allowed to be.
#
# These options help us tolerate clock skew, and help survive the case where the
# directory authorities are unable to reach consensus for a while.
[directory_tolerance]
# For how long before a directory document is valid should we accept it?
#pre_valid_tolerance = "1 day"

# For how long after a directory document is valid should we consider it usable?
#post_valid_tolerance = "3 days"

# Tells the circuit manager rule for constructing circuit paths
[path_rules]

# How far apart do relays need to be in IP-space before they can be
# used in the same circuit?  For example, "ipv4_subnet_family_prefix=16"
# means that two relays cannot appear in the same circuit if their
# IPv4 addresses begin with the same 16 bits.
#ipv4_subnet_family_prefix = 16
#ipv6_subnet_family_prefix = 32

# Which addresses are we willing to contact directly?
#
# This option can be used to specify a set of addresses or ports that are
# permitted: typically, because a local firewall blocks everything else.  For
# example, [ "*:80", "*:443"] would only try to connect to relays on the network
# that support port 80 or port 443. You can use prefix lengths and port ranges,
# too: "198.51.100.0/24:1-1024" is a valid pattern.
#
# By default, all addresses and ports are permitted.
#reachable_addrs = [ "*:*" ]

# Configure preemptive circuit construction.
#
# Preemptive circuits are built ahead of time, to anticipate client need. This
# section configures the way in which this demand is anticipated and in which
# these circuits are constructed.
[preemptive_circuits]
# If we have at least this many available circuits, we suspend
# construction of preemptive circuits. whether our available circuits
# support our predicted exit ports or not.
#disable_at_threshold = 12

# At startup, which exit ports should we expect that the client will want?
#
# (Over time, new ports are added to this list in response to what the client
# has actually requested.)
#initial_predicted_ports = [80, 443]

# After we see the client request a connection to a new port, how long should we
# predict that the client will still want to have circuits available for that
# port?
#prediction_lifetime = "1 hour"

# How many available circuits should we try to have, at minimum, for each
# predicted exit port?
#min_exit_circs_for_port = 2

# Configuration information about the Tor network itself
[tor_network]
# List of locations to look in when downloading directory information
# we don't actually have a directory yet.
#   fallback_caches = [ <default list is compiled-in > ]

# List of directory authorities which we expect to sign consensus documents.
#   authorities = [ <default list is compiled-in > ]

# Channels and their behaviour
[channel]

# Should we use reduced channel padding?  (This roughly halves the padding
# cell frequency, and makes the padding unidirectional, increasing the
# traceability of the client connections.)
# Or disable it entirely?
#
#padding = "normal"
#   padding = "reduced"
#   padding = "none"

# Full manual control of the precise padding timing parameters is available
# by setting `override_net_params.nf_ito_low` et al.
# (See torpsec/padding-spec.txt section 3.4.)

# Configure an outbound proxy for connecting to the Tor network.
#
# If set, Arti will connect to the Tor network via this SOCKS proxy
# instead of making direct connections to Tor relays.
#
# The proxy is specified as a URI string with the following formats:
#   - socks4://host:port          - SOCKS4 proxy without authentication
#   - socks4a://host:port         - SOCKS4a proxy (same as socks4)
#   - socks5://host:port          - SOCKS5 proxy without authentication
#   - socks5://user:pass@host:port - SOCKS5 proxy with username/password auth
#
# IPv6 addresses should be enclosed in brackets: socks5://[::1]:1080
#
# Examples:
#   outbound_proxy = "socks5://127.0.0.1:1080"
#   outbound_proxy = "socks5://user:pass@192.168.1.1:9050"
#   outbound_proxy = "socks5://[::1]:1080"
#
# By default, no outbound proxy is used.
#outbound_proxy = ""

# Rules for how long circuits should survive, and how long pending
# requests should wait for a circuit.
[circuit_timing]

# Once a circuit has been used for a request, we stop giving it out for
# other requests after this time.
#max_dirtiness = "10 minutes"

# When a circuit is requested, we keep trying to build circuits for up
# to this long before the request gives up.
#request_timeout = "60 sec"

# When a circuit is requested, we make up to this many attempts to build
# circuits for it before the request gives up.
#request_max_retries = 16

# If a circuit is finished that would satisfy a pending request, but the
# request is still waiting for its own circuits to complete, the request
# will wait this long before using the unexpectedly available circuit.
#request_loyalty = "50 msec"

# Rules for which addresses a client is willing to try to connect to over
# the tor network.
[address_filter]

# Should we allow attempts to make Tor connections to local addresses?
#allow_local_addrs = false

# Rules for how long streams should wait when connecting to host or performing a
# DNS lookup.
#
# These timeouts measure the permitted time between sending a request on an
# established circuit, and getting a response from the exit node.
[stream_timeouts]

# How long should we wait before timing out a stream when connecting to a host?
#connect_timeout = "10 sec"

# How long should we wait before timing out when resolving a DNS record?
#resolve_timeout = "10 sec"

# How long should we wait before timing out when resolving a DNS PTR record?
#resolve_ptr_timeout = "10 sec"

# Configuration for the system resources used by Arti.
[system]

# What is the maximum number of file descriptors which should be available
# to Arti when we launch?
#max_files = 16384