Provided by: fort-validator_1.5.4-1_amd64 
NAME
fort - RPKI validator and RTR server
SYNOPSIS
fort [--mode=server] [OPTIONS]
fort --mode=standalone [OPTIONS]
fort --init-tals --tal=PATH
fort [-h|--help|--V|--version|--usage]
DESCRIPTION
Fort is an RPKI "Relying Party" (RP). It's an artifact that validates Route Origin
Attestations (ROAs) and BGPsec Router Keys, by way of a Public Key Infrastructure (PKI).
ROAs are employed by routers, to verify BGP routing attestations.
The main validation input is one or more Trust Anchor Locator (TAL) files (--tal), which
point to the RPKI Trust Anchors (ie. root certificates). Fort downloads all the resources
governed by the trust anchors into a local cache (--local-repository), and proceeds to
validate their entirety. The output of the validation is a set of trusted ROAs and Router
Keys, which are printed to files (--output.roa and --output.bgpsec) and/or served to
routers (--mode=server, --server.address, --server.port) through the RTR protocol (version
0 or 1).
OPTIONS
-h, --help
Print long usage message and exit.
--usage
Print short usage message and exit.
-V, --version
Print program version and exit.
--init-tals
Download the currently known core TALs into the existent local directory --tal, then
exit.
The "currently known core TALs" are
https://rpki.afrinic.net/tal/afrinic.tal
https://tal.apnic.net/apnic.tal
https://www.arin.net/resources/manage/rpki/arin.tal
https://www.lacnic.net/innovaportal/file/4983/1/lacnic.tal
https://tal.rpki.ripe.net/ripe-ncc.tal
Please note that ARIN requires that you accept a Relying Party Agreement before you
can download their TAL: https://www.arin.net/resources/manage/rpki/rpa.pdf
--init-as0-tals
Download the currently known AS0 TALs into the existent local directory --tal, then
exit.
The "currently known AS0 TALs" are
https://tal.apnic.net/apnic-as0.tal
https://www.lacnic.net/innovaportal/file/4983/1/lacnic-as0.tal
-f, --configuration-file=FILE
Path to a JSON file from where additional configuration will be read.
The configuration options are mostly the same as the ones presented in this manual.
Each property is mapped as a member of the main JSON object, the members that contain
a dot '.' must be set as objects (eg. "--server.port=8323" will be set as "{
"server": { "port": "8323" } }".
An example configuration file can be seen in this manual at the EXAMPLES section.
Some configuration options can't be set at the JSON configuration file: --version,
--help, --version, and --configuration-file.
Other configuration options can be configured exclusively at the JSON configuration
file:
rsync.program
Name of the program needed to invoke an rsync file transfer. The default value is
"rsync".
rsync.arguments-recursive
Arguments needed by rsync.program to perform a recursive rsync. The arguments are
specified as a JSON string array; its default value is: [ "--recursive",
"--delete", "--times", "--contimeout=20", "--timeout=15", "$REMOTE", "$LOCAL" ]
FORT will replace "$REMOTE" with the remote URL it needs to download, and "$LOCAL"
with the target local directory where the file is supposed to be dropped.
If rsync.program set is rsync (default value), see more about its arguments and
behavior at rsync(1).
rsync.arguments-flat
Arguments needed by rsync.program to perform a single-file rsync. The arguments
are specified as a JSON string array; its default value is: [ "--times",
"--contimeout=20", "--timeout=15", "--dirs", "$REMOTE", "$LOCAL" ]
FORT will replace "$REMOTE" with the remote URL it needs to download, and "$LOCAL"
with the target local directory where the file is supposed to be dropped.
If rsync.program set is rsync (default value), see more about its arguments and
behavior at rsync(1).
incidences
A listing of actions to be performed by validation upon encountering certain
common error conditions. This configuration is a means to modify FORTs validator
behavior upon encountering profile violations that, from experience, are often
overlooked.
The incidences are configured inside the member "incidences" as a JSON array of
objects, each with two members "name" and "action", eg:
"incidences": [
{
"name": "incid-hashalg-has-params",
"action": "warn"
}, {
"name": "incid-obj-not-der-encoded",
"action": "error"
}
]
An incidence contains a name and an action. The name is merely an identifier
defined by FORT that states a particular error condition, and the action is an
enumeration that states the outcome of a violation of the corresponding incidence.
The action can have one of three values:
error: Print error message in error log level, fail validation of the
offending object (and all of its children).
warn: Print error message in warning log level, continue validation as if
nothing happened.
ignore: Do not print error message, continue validation as if nothing
happened.
Currently these are the registered incidences, each with a distinct action
configured by default.
incid-hashalg-has-params (Signed Object's hash algorithm has NULL object as
parameters). [Default action: ignore]
incid-obj-not-der-encoded (Object isn't DER encoded). [Default action: ignore]
incid-file-at-mft-not-found (File listed at manifest doesn't exist). [Default
action: error]
incid-file-at-mft-hash-not-match (File hash listed at manifest doesn't match
the actual file hash). [Default action: error]
incid-mft-stale (Manifest is stale). [Default action: error]
incid-crl-stale (CRL is stale). [Default action: error]
More information about incidences can be consulted at FORT's web docs.
-t, --tal=(FILE|DIRECTORY)
Path to a .tal, or a directory containing .tal files. Fort will validate the trees
pointed by them.
The TAL ("Trust Anchor Locator") is a text file that lists a few URLs which can be
used to access the "Trust Anchor" (the root of a particular RPKI tree) and its public
key. (See RFC 8630.)
-r, --local-repository=DIRECTORY
Path to a directory where the local cache of the repository will be stored and/or
read.
FORT accesses RPKI repositories either with rsync or RRDP (see RFC 8182). During each
validation cycle, and depending on the preferred access methods defined by the CAs,
Fort can do two things:
- Literally invoke an rsync command (see rsync.program and rsync.arguments-
recursive), which will download the files into --local-repository.
- Fetch the RRDP Update Notification file (which implies an HTTP request) and
fetch the files from there on (can be obtained from a Snapshot file or Delta
files). The files will be downloaed into --local-repository.
Fort's entire validation process operates on the resulting copy of the files (doesn't
matter if the files where fetched by rsync of https).
Because rsync uses delta encoding, you’re advised to keep this cache around. It
significantly speeds up subsequent validation cycles.
By default, the path is /var/lib/fort.
--daemon
If this flag is activated, Fort will run as a daemon. The process is detached from the
calling terminal and sent to the background.
All the enabled logs will be sent to syslog, so the configured values of --log.output
and --validation-log.output will be ignored.
--sync-strategy=(off|strict|root|root-except-ta)
This argument will be DEPRECATED. Use --rsync.strategy or --rsync.enabled (if rsync is
meant to be disabled) instead.
rsync download strategy; states the way rsync URLs are approached during downloads.
Despite this argument will be deprecated, it still can be utilized. It can have one of
four values:
- off: will disable rsync execution. So, using --sync-strategy=off will be the
same as --rsync.enabled=false.
- strict: will be the same as --rsync.strategy=strict.
- root: will be the same as --rsync.strategy=root.
- root-except-ta (default value): will be the same as --rsync.strategy=root-
except-ta.
--work-offline
If this flag is activated, Fort will disable all outgoing requests (currently done
with: rsync and https (RRDP protocol uses HTTPS to fetch data)). All repository files
(certificates, ROAs, etc.) are expected to exist at configured --local-repository.
Otherwise, Fort will perform outgoing requests whenever this is needed. If a specific
protocol needs to be deactivated, use --rsync.enabled or --http.enabled.
--shuffle-uris
If enabled, FORT will access TAL URLs in random order. This is meant for load
balancing. If disabled, FORT will access TAL URLs in sequential order.
By default, the flag is disabled.
This flag is only relevant if the TAL lists more than one URL. Regardless of this
flag, FORT will stop iterating through the URLs as soon as it finds one that yields a
successful traversal.
If the TAL lists more than one URL, the shuffle is done honoring the priority of the
protocols (see --rsync.priority and --http.priority). i.e. if the HTTP protocol has a
higher priority than RSYNC, then all the shuffled HTTP URLs will come first.
--maximum-certificate-depth=UNSIGNED_INTEGER
Maximum allowable certificate chain length. Meant to protect FORT from iterating
infinitely due to certificate chain loops.
By default, it has a value of 32. The minimum allowed value is 5.
(Required to prevent loops and "other degenerate forms of the logical RPKI hierarchy."
(RFC 6481))
--slurm=(FILE|DIRECTORY)
Path to the SLURM FILE or SLURMs DIRECTORY.
The SLURM definition is from RFC 8416. SLURM stands for "Simplified Local Internet
Number Resource Management with the RPKI", basically is a document that can override
(either as a filter or adding assertions) the global RPKI repository data fetched by
FORT; potentially useful for network operators.
In case a DIRECTORY is set, the files with extension '.slurm' will be the ones
considered as SLURM files and FORT will use them.
The configured SLURM path (either FILE or DIRECTORY) will be read each time a new
validation cycle begins. If there's a syntax or content error, the last valid version
of the SLURM will be applied (if there's one) and a message will be logged to indicate
this action. Note that all this will happen only if --mode=server and --slurm is
configured.
A basic example of a SLURM file can be seen in this manual at the EXAMPLES section
(it's almost the same as the one in RFC 8416).
See more about SLURM configuration at FORT's web docs.
--mode=(server|standalone)
Commands the way FORT executes the validation, its possible values are:
server
Enable the RTR server using the server.* arguments.
standalone
Disable the RTR server, the configuration options server.* are ignored and FORT
performs an in-place standalone validation.
By default, the mode is server.
--server.address=NODE(S)
List of hostnames or numeric host addresses the RTR server will be bound to. Must
resolve to (or be) bindable IP addresses. IPv4 and IPv6 are supported.
The list of addresses must be comma sepparated, and each address must have the
following format: <address>[#<port>]. Note that the port is optional; in case that a
port isn't specified, the value of --server.port will be utilized with the
corresponding address.
Here are some examples of valid values for this argument:
- --server.address="localhost": will bind to 'localhost' and the configured port at
--server.port.
- --server.address="localhost,::1#8324": same as the previous example, and also will
bind to IPv6 address '::1' at the port '8324'.
- --server.address="localhost#8323,::1#8324": will bind to 'localhost' at port '8323',
and to '::1' port '8324'. The value of --server.port isn't utilized.
If this field is omitted, FORT will attempt to bind the server using the IP address
INADDR_ANY (for an IPv4 address) or IN6ADDR_ANY_INIT (for an IPv6 address). See
getaddrinfo(3).
--server.port=SERVICE
TCP port or service the server address(es) will be bound to by default if no port is
set (see --server.address).
This is a string because a service alias can be used as a valid value. The alias are
commonly located at /etc/services. See also getaddrinfo(3) and services(5).
The default port (323) is privileged. To improve security, either change or jail it.
The default fort-validator.service configuration sets the CAP_NET_BIND_SERVICE
capability to allow the unprivileged daemon to bind port 323 anyway.
--server.backlog=UNSIGNED_INTEGER
RTR server’s listen queue length. It’s the second argument of the function listen (see
more at man listen(2)). This provides a hint to the implementation which the
implementation shall use to limit the number of outstanding connections in the
socket’s listen queue.
By default, it has a value of SOMAXCONN.
--server.interval.validation=UNSIGNED_INTEGER
Number of seconds that FORT will sleep between validation cycles. The timer starts
counting every time a validation is finished, not every time it begins. Therefore,
the actual validation loop is longer than this number.
By default, it has a value of 3600.
--server.interval.refresh=UNSIGNED_INTEGER
Number of seconds that a router should wait before the next attempt to poll FORT using
either a Serial Query PDU or Reset Query PDU. Countdown for this timer starts upon
receipt of an End Of Data PDU (this should be administered by the client).
This value is utilized only on RTR version 1 sessions (more information at RFC 8210
section 6).
By default, it has a value of 3600. Minimum allowed value: 1, maximum allowed value
86400.
--server.interval.retry=UNSIGNED_INTEGER
Number of seconds that a router should wait before retrying a failed Serial Query PDU
or Reset Query PDU. Countdown for this timer starts upon failure of the query and
restarts after each subsequent failure until a query succeeds (this should be
administered by the client).
This value is utilized only on RTR version 1 sessions (more information at RFC 8210
section 6).
By default, it has a value of 600. Minimum allowed value: 1, maximum allowed value
7200.
--server.interval.expire=UNSIGNED_INTEGER
Number of seconds that a router can retain the current version of data while unable to
perform a successful subsequent query. Countdown for this timer starts upon receipt of
an End Of Data PDU (this should be administered by the client).
This value is utilized only on RTR version 1 sessions (more information at RFC 8210
section 6).
By default, it has a value of 7200. Minimum allowed value: 600, maximum allowed value
172800. It must be larger than server.interval.refresh and server.interval.retry.
--server.deltas.lifetime=UNSIGNED_INTEGER
When routers first connect to Fort, they request a snapshot of the validation results.
(ROAs and Router Keys.) Because they need to keep their validated objects updated, and
snapshots tend to be relatively large amounts of information, they request deltas
afterwards over configurable intervals. ("Deltas" being the differences between
snapshots.)
During each validation cycle, Fort generates a new snapshot, as well as the deltas
needed to build the new snapshot from the previous one. These are all stored in RAM.
--server.deltas.lifetime is the number of iterations a set of deltas will be kept
before being deallocated. (Recall that every iteration lasts
--server.interval.validation seconds, plus however long the validation takes.)
If a router lags behind, to the point Fort has already deleted the deltas it needs to
update the router’s snapshot, Fort will have to fall back to fetch the entire latest
snapshot instead.
--log.enabled=true|false
Enables the operation logs.
By default, it has a value of true (these logs are enabled).
Read more about logs at FORT validator's web docs, module 'Logging'.
--log.level=(error|warning|info|debug)
Defines which operation log messages will be logged according to its priority, e.g. a
value of info will log messages of equal or higher level (info, warning, and error).
The priority levels, from higher to lowest, are:
- error
- warning
- info
- debug
By default, it has a value of warning.
Read more about logs at FORT validator's web docs, module 'Logging'.
--log.output=(syslog|console)
Desired output where the operation logs will be printed.
The value console will log messages at standard output and standard error; syslog will
log to syslog.
Depending on the OS, distinct implementations of syslog could be installed (syslog,
rsyslog, or syslog-ng are the most common ones). Syslog usage and configuration is out
of this man scope.
By default, it has a value of console.
Read more about logs at FORT validator's web docs, module 'Logging'.
-c, --log.color-output=true|false
If enabled, the operation logs output will contain ANSI color codes. Meant for human
consumption.
Meaningful only if --log.output value is console.
By default, it has a value of false (it's disabled).
Read more about logs at FORT validator's web docs, module 'Logging'.
--log.file-name-format=(global-url | local-path | file-name)
Decides which version of file names should be printed during most debug/error messages
at the operation logs.
Suppose a certificate was downloaded from `rsync://rpki.example.com/foo/bar/baz.cer`
into the local cache `repository/`:
global-url
Will print the certificate's name as `rsync://rpki.example.com/foo/bar/baz.cer`.
local-path
Will print the certificate's name as
`repository/rpki.example.com/foo/bar/baz.cer`.
file-name
Will print the certificate's name as `baz.cer`.
By default, it has a value of global-url.
Read more about logs at FORT validator's web docs, module 'Logging'.
--log.facility=(auth | authpriv | cron | daemon | ftp | lpr | mail | news | user | uucp |
from local0 to local7)
Syslog facility utilized for operation logs (meaningful only if --log.output is
syslog).
By default, it has a value of daemon.
Read more about logs at FORT validator's web docs, module 'Logging'.
--log.tag=STRING
Text tag that will be added to the operation log messages (it will appear inside
square brackets).
By default, it has a NULL value.
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.enabled=true|false
Enables the validation logs.
By default, it has a value of false (these logs are disabled).
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.level=(error|warning|info|debug)
Defines which validation log messages will be logged according to its priority, e.g. a
value of info will log messages of equal or higher level (info, warning, and error).
The priority levels, from higher to lowest, are:
- error
- warning
- info
- debug
By default, it has a value of warning.
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.output=(syslog|console)
Desired output where the validation logs will be printed.
The value console will log messages at standard output and standard error; syslog will
log to syslog.
Depending on the OS, distinct implementations of syslog could be installed (syslog,
rsyslog, or syslog-ng are the most common ones). Syslog usage and configuration is out
of this man scope.
By default, it has a value of console.
Read more about logs at FORT validator's web docs, module 'Logging'.
-c, --validation-log.color-output=true|false
If enabled, the validation logs output will contain ANSI color codes. Meant for human
consumption.
Meaningful only if --validation-log.output value is console.
By default, it has a value of false (it's disabled).
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.file-name-format=(global-url | local-path | file-name)
Decides which version of file names should be printed during most debug/error messages
at the validation logs.
Suppose a certificate was downloaded from `rsync://rpki.example.com/foo/bar/baz.cer`
into the local cache `repository/`:
global-url
Will print the certificate's name as `rsync://rpki.example.com/foo/bar/baz.cer`.
local-path
Will print the certificate's name as
`repository/rpki.example.com/foo/bar/baz.cer`.
file-name
Will print the certificate's name as `baz.cer`.
By default, it has a value of global-url.
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.facility=(auth | authpriv | cron | daemon | ftp | lpr | mail | news |
user | uucp | from local0 to local7)
Syslog facility utilized for validation logs (meaningful only if --validation-
log.output is syslog).
By default, it has a value of daemon.
Read more about logs at FORT validator's web docs, module 'Logging'.
--validation-log.tag=STRING
Text tag that will be added to the validation log messages (it will appear inside
square brackets).
By default, it has the value Validation.
Read more about logs at FORT validator's web docs, module 'Logging'.
--http.enabled=true|false
Enables outgoing HTTP requests.
If disabled (eg. --http.enabled=false), FORT validator won't request HTTP URIs, and
will expect to find all the corresponding repository files at --local-repository.
--http.priority=UNSIGNED_INTEGER
Assign priority to use HTTP to fetch repository files. A higher value means a higher
priority.
This argument works along with --rsync.priority, since the higher value of the two
arguments will result in the first protocol to utilize when fetching repositories
files. Of course, this depends also on certificates information or the TAL URIs, since
currently HTTP URIs are optional and not every RIR repository makes use of them.
Whenever a certificate or a TAL has both RSYNC and HTTP URIs, the following criteria
is followed to prioritize which one to use first:
- --rsync.priority equals --http.priority: use the order specified at the
certificate or the TAL to fetch the corresponding URI.
- --rsync.priority greater than --http.priority: use RSYNC repository/TAL URI
first; if there's an error fetching data, fallback to fetch HTTP repository/TAL
URI.
- --rsync.priority less than --http.priority: use HTTP repository/TAL URI first;
if there's an error fetching data, fallback to use RSYNC repository/TAL URI.
By default, the value is 60, so HTTP requests are preferred over rsync requests.
--http.retry.count=UNSIGNED_INTEGER
Maximum number of retries whenever there's an error requesting an HTTP URI.
A value of 0 means no retries.
Whenever is necessary to request an HTTP URI, the validator will try the request at
least once. If there was an error requesting the URI, the validator will retry at most
--http.retry.count times to fetch the file, waiting --http.retry.interval seconds
between each retry.
By default, the value is 2.
--http.retry.interval=UNSIGNED_INTEGER
Period (in seconds) to wait between retries after an error ocurred requestin HTTP
URIs.
By default, the value is 5.
--http.user-agent=STRING
User-Agent to use at HTTP requests.
The value specified (either by the argument or the default value) is utilized in
libcurl’s option CURLOPT_USERAGENT.
By default, the value is fort/<current-version>.
--http.connect-timeout=UNSIGNED_INTEGER
Timeout (in seconds) for the connect phase.
Whenever an HTTP connection will try to be established, the validator will wait a
maximum of http.connect-timeout seconds for the peer to respond to the connection
request; if the timeout is reached, the connection attempt will be ceased.
The value specified (either by the argument or the default value) is utilized in
libcurl’s option CURLOPT_CONNECTTIMEOUT.
By default, it has a value of 30. The minimum allowed value is 1.
--http.transfer-timeout=UNSIGNED_INTEGER
Maximum time in seconds (once the connection is established) that the request can
last.
Once the connection is established with the server, the request will last a maximum of
http.transfer-timeout seconds. A value of 0 means unlimited time (default value).
The value specified (either by the argument or the default value) is utilized in
libcurl’s option CURLOPT_TIMEOUT.
By default, it has a value of 0.
--low-speed-limit=UNSIGNED_INTEGER
The value Fort employs as CURLOPT_LOW_SPEED_LIMIT during every HTTP transfer.
"Abort connection if slower than LIMIT bytes/sec during TIME seconds."
(See --low-speed-time.)
Default: 100000 (100 KB/s)
--low-speed-time=UNSIGNED_INTEGER
The value Fort employs as CURLOPT_LOW_SPEED_TIME during every HTTP transfer.
"Abort connection if slower than LIMIT bytes/sec during TIME seconds."
(See --low-speed-limit.)
Default: 10
--http.max-file-size=UNSIGNED_INTEGER
Maximum amount of bytes files are allowed to length during HTTP transfers.
Default: 1000000000 (1 GB)
--http.ca-path=DIRECTORY
Local path where the CA’s utilized to verify the peers are located.
Useful when the CA from the peer isn’t located at the default OS certificate bundle.
If specified, the peer certificate will be verified using the CAs at the path. The
directory MUST be prepared using the rehash utility from the SSL library:
- OpenSSL command (with help): $ openssl rehash -h
- LibreSSL command (with help): $ openssl certhash -h
The value specified is utilized in libcurl’s option CURLOPT_CAPATH.
By default, the path has a NULL value.
--rrdp.enabled=true|false
This argument will be DEPRECATED. Use --http.enabled instead.
--rrdp.priority=UNSIGNED_INTEGER
This argument will be DEPRECATED. Use --http.priority instead.
--rrdp.retry.count=UNSIGNED_INTEGER
This argument will be DEPRECATED. Use --http.retry.count instead.
--rrdp.retry.interval=UNSIGNED_INTEGER
This argument will be DEPRECATED. Use --http.retry.interval instead.
--rsync.enabled=true|false
Enables RSYNC requests.
If disabled (eg. --rsync.enabled=false), FORT validator won't download files nor
directories via RSYNC, and will expect to find all repository files at --local-
repository.
--rsync.priority=UNSIGNED_INTEGER
Assign priority to use RSYNC to fetch repository files. A higher value means a higher
priority.
This argument works along with --http.priority, since the higher value of the two
arguments will result in the first protocol to utilize when fetching repositories
files. Of course, this depends also on certificates information or the TAL URIs, since
currently HTTP URIs are optional and not every RIR repository makes use of them.
Whenever a certificate has both RSYNC and HTTP URIs, the following criteria is
followed to prioritize which one to use first:
- --rsync.priority equals --http.priority: use the order specified at the
certificate or the TAL to fetch the corresponding URI.
- --rsync.priority greater than --http.priority: use RSYNC repository/TAL URI
first; if there's an error fetching data, fallback to use fetch HTTP
repository/TAL URI.
- --rsync.priority less than --http.priority: use HTTP repository/TAL URI first;
if there's an error fetching data, fallback to use RSYNC repository/TAL URI.
By default, the value is 50, so HTTP requests are preferred over rsync requests.
--rsync.strategy=(strict|root|root-except-ta)
rsync download strategy; states the way rsync URLs are approached during downloads. It
can have one of three values: strict, root, root-except-ta(default value).
strict
In order to enable this strategy, FORT must be compiled using the flag:
ENABLE_STRICT_STRATEGY. e.g.
$ make FORT_FLAGS='-DENABLE_STRICT_STRATEGY'
RSYNC every repository publication point separately. Only skip publication points
that have already been downloaded during the current validation cycle. (Assuming
each synchronization is recursive.)
For example, suppose the validator gets certificates whose caRepository access
methods (in their Subject Information Access extensions) point to the following
publication points:
1. rsync://rpki.example.com/foo/bar/
2. rsync://rpki.example.com/foo/qux/
3. rsync://rpki.example.com/foo/bar/
4. rsync://rpki.example.com/foo/corge/grault/
5. rsync://rpki.example.com/foo/corge/
6. rsync://rpki.example.com/foo/corge/waldo/
A validator following the `strict` strategy would download `bar`, download `qux`,
skip `bar`, download `corge/grault`, download `corge` and skip `corge/waldo`.
This is the slowest, but also the strictly correct sync strategy.
root
For each publication point found, guess the root of its repository and RSYNC that
instead. Then skip any subsequent children of said root.
(To guess the root of a repository, the validator counts four slashes, and prunes
the rest of the URL.)
Reusing the caRepository URLs from the `strict` strategy (above) as example, a
validator following the `root` strategy would download
`rsync://rpki.example.com/foo`, and then skip everything else.
Assuming that the repository is specifically structured to be found within as few
roots as possible, and they contain minimal RPKI-unrelated noise files, this is
the fastest synchronization strategy. At time of writing, this is true for all the
current official repositories.
root-except-ta
Synchronizes the root certificate (the one pointed by the TAL) in 'strict' mode,
and once it's validated, synchronizes the rest of the repository in 'root' mode.
Useful if you want 'root', but the root certificate is separated from the rest of
the repository. Also useful if you don't want the validator to download the entire
repository without first confirming the integrity and legitimacy of the root
certificate.
--rsync.retry.count=UNSIGNED_INTEGER
Maximum number of retries whenever there's an error executing RSYNC.
A value of 0 means no retries.
Whenever is necessary to execute an RSYNC, the validator will try the execution at
least once. If there was an error executing the RSYNC, the validator will retry it at
most --rsync.retry.count times, waiting --rsync.retry.interval seconds between each
retry.
By default, the value is 2.
--rsync.retry.interval=UNSIGNED_INTEGER
Period (in seconds) to wait between retries after an RSYNC error ocurred.
By default, the value is 5.
--output.roa=FILE
File where the ROAs will be printed in the configured format (see --output.format).
When the FILE is specified, its content will be overwritten by the resulting ROAs of
the validation (if FILE doesn't exists, it'll be created).
When --output.format=csv (which is the default value), then each line of the result is
printed in the following order: AS, Prefix, Max prefix length; the first line contains
those column descriptors.
When --output.format=json, then each element is printed inside an object array of
"roas"; ie:
{
"roas": [
{
"asn": "AS64496",
"prefix": "198.51.100.0/24",
"maxLength": 24
},
{
"asn": "AS64496",
"prefix": "2001:DB8::/32",
"maxLength": 48
}
]
}
In order to print the ROAs at console, use a hyphen as the FILE value, eg.
--output.roa=-
By default, it has no value set.
--output.bgpsec=FILE
File where the BGPsec Router Keys will be printed in the configured format (see
--output.format).
Since most of the data is binary (Subject Key Identifier and Subject Public Key Info),
such data is base64url encoded without trailing pads.
When the FILE is specified, its content will be overwritten by the resulting Router
Keys of the validation (if FILE doesn't exists, it'll be created).
When --output.format=csv (which is the default value), then each line of the result is
printed in the following order: AS, Subject Key Identifier, Subject Public Key Info;
the first line contains those column descriptors.
When --output.format=json, then each element is printed inside an object array of
"router-keys"; ie:
{
"router-keys": [
{
"asn": "AS64496",
"ski": "<Base64 Encoded SKI>",
"spki": "<Base64 Encoded SPKI>"
},
{
"asn": "AS64496",
"ski": "<Base64 Encoded SKI>",
"spki": "<Base64 Encoded SPKI>"
}
]
}
In order to print the Router Keys at console, use a hyphen as the FILE value, eg.
--output.bgpsec=-
By default, it has no value set.
--output.format=csv|json
Output format for --output.roa and --output.bgpsec.
By default, it has a value of csv.
--thread-pool.server.max=UNSIGNED_INTEGER
Number of threads the RTR server will reserve for RTR client (router) request
handling. The server will be able to handle --thread-pool.server.max requests at most,
at once. Additional requests will queue.
Minimum: 1
Maximum: UINT_MAX
Default: 20
--thread-pool.validation.max=UNSIGNED_INTEGER
Maximum number of threads that will be spawned at an internal thread pool in order to
run validation cycles.
When a validation cycle begins, one thread per configured TAL is utilized; once the
whole RPKI tree of the TAL is validated, the thread is returned to the pool.
If there are more TALs at --tal than --thread-pool.validation.max threads at the pool,
is very likely that the validation cycles take a bit more of time to complete since
only --thread-pool.validation.max threads will be working at the same time. E.g. if
--thread-pool.validation.max=2 and the location at --tal has 4 TAL files, only 2 TALs
will be validated simultaneously while the rest waits in a queue until there's an
available thread at the pool to attend them.
By default, it has a value of 5. Minimum allowed value: 1, maximum allowed value 100.
--asn1-decode-max-stack=UNSIGNED_INTEGER
ASN1 decoder max allowed stack size in bytes, utilized to avoid a stack overflow when
a large nested ASN1 object is parsed.
By default, it has a value of 4096 (4 kB).
--stale-repository-period=UNSIGNED_INTEGER
Time period that must lapse to warn about a stale repository (the messages will be
sent to the operation log). The time lapse starts once the repository download has
been retried (see --rsync.retry.count and --http.retry.count) and failed after such
retries.
A repository is considered stale if its files can't be fetched due to a communication
error and this error persists across validation cycles. This kind of issues can be due
to a local misconfiguration (eg. a firewall that blocks incoming data) or a problem at
the server (eg. the server is down).
Despite who's "fault" is, FORT validator will try to work with the local files from
--local-repository.
The communication errors sent to the operation log, are those related to "first level"
RPKI servers; commonly this are the servers maintained by the RIRs.
Currently all the communication errors are logged at the validation log. This
argument (--stale-repository-period) is merely to send this error messages also to the
operation log.
A value equal to 0 means that the communication errors will be logged at once.
By default, it has a value of 43200 (12 hours).
EXAMPLES
fort --init-tals --tal=/tmp/tal
Download the 5 RIR TALs into the specified directory. ARIN TAL will be downloaded only
if the user accepts ARIN's RPA.
fort -t /etc/tals -r /var/lib/fort --server.port=9323
Run FORT with all the default values, using a custom TALs directory, a custom
repository directory as well, and binding the RTR server to port 9323.
fort -t /etc/tals -r /var/lib/fort --mode=standalone --output.roa=-
Run FORT as standalone and output ROAs CSV to the console.
fort -t /etc/tals -r /var/lib/fort \
--mode=standalone \
--slurm=/etc/fort/slurm/
Run FORT as standalone and using a SLURM file.
fort --configuration-file=conf.json
Run FORT using the JSON configuration file conf.json.
fort -t /etc/tals -r /var/lib/fort \
--server.address=::1 --server.port=9323 \
--server.interval.validation=1800 \
--output.roa=/tmp/roas.csv
Run FORT with RTR server listening on IPv6 address ::1, port 9323, validating every 30
minutes, and printing the ROAs CSV in a file.
Complete configuration file
This is an example of a valid JSON configuration file with all its members set to a
specific value:
{
"tal": "/etc/tals/",
"local-repository": "/var/lib/fort/",
"work-offline": false,
"shuffle-uris": true,
"maximum-certificate-depth": 32,
"mode": "server",
"daemon": false,
"slurm": "/etc/fort/slurm/",
"server": {
"address": [
"192.0.2.1",
"2001:db8::1"
],
"port": "8323",
"backlog": 64,
"interval": {
"validation": 3600,
"refresh": 3600,
"retry": 600,
"expire": 7200
},
"deltas": {
"lifetime": 4
}
},
"log": {
"enabled": true,
"level": "warning",
"output": "console",
"color-output": true,
"file-name-format": "local-path",
"facility": "daemon",
"tag": "Operation"
},
"validation-log": {
"enabled": false,
"level": "warning",
"output": "console",
"color-output": true,
"file-name-format": "local-path",
"facility": "daemon",
"tag": "Validation"
},
"http": {
"enabled": true,
"priority": 60,
"retry": {
"count": 2,
"interval": 5
},
"user-agent": "fort/1.5.1",
"connect-timeout": 30,
"transfer-timeout": 0,
"idle-timeout": 15,
"ca-path": "/usr/local/ssl/certs"
},
"rsync": {
"enabled": true,
"priority": 50,
"strategy": "root-except-ta",
"retry": {
"count": 2,
"interval": 5
},
"program": "rsync",
"arguments-recursive": [
"--recursive",
"--delete",
"--times",
"--contimeout=20",
"--timeout=15",
"$REMOTE",
"$LOCAL"
],
"arguments-flat": [
"--times",
"--contimeout=20",
"--timeout=15",
"--dirs",
"$REMOTE",
"$LOCAL"
]
},
"incidences": [
{
"name": "incid-hashalg-has-params",
"action": "ignore"
},
{
"name": "incid-obj-not-der-encoded",
"action": "ignore"
},
{
"name": "incid-file-at-mft-not-found",
"action": "error"
},
{
"name": "incid-file-at-mft-hash-not-match",
"action": "error"
},
{
"name": "incid-mft-stale",
"action": "error"
},
{
"name": "incid-crl-stale",
"action": "error"
}
],
"output": {
"roa": "/tmp/fort/roas.csv",
"bgpsec": "/tmp/fort/bgpsec.csv",
"format": "csv"
},
"thread-pool": {
"server": {
"max": 20
},
"validation": {
"max": 5
}
},
"asn1-decode-max-stack": 4096,
"stale-repository-period": 43200
}
Dummy SLURM file
This is an example of a SLURM file with some prefix filters and assertions, as well as
some dummy Router Keys (BGPsec) info:
{
"slurmVersion": 1,
"validationOutputFilters": {
"prefixFilters": [
{
"prefix": "192.0.2.0/24",
"comment": "All VRPs encompassed by prefix"
},
{
"asn": 64496,
"comment": "All VRPs matching ASN"
},
{
"prefix": "198.51.100.0/24",
"asn": 64497,
"comment": "All VRPs encompassed by prefix, matching ASN"
}
],
"bgpsecFilters": [
{
"asn": 64496,
"comment": "All keys for ASN"
},
{
"SKI": "Q8KMeBsCto1PJ6EuhowleIGNL7A",
"comment": "Key matching Router SKI"
},
{
"asn": 64497,
"SKI": "g5RQYCnkMpDqEbt9WazTeB19nZs",
"comment": "Key for ASN 64497 matching Router SKI"
}
]
},
"locallyAddedAssertions": {
"prefixAssertions": [
{
"asn": 64496,
"prefix": "198.51.100.0/24",
"comment": "My other important route"
},
{
"asn": 64496,
"prefix": "2001:DB8::/32",
"maxPrefixLength": 48,
"comment": "My other important de-aggregated routes"
}
],
"bgpsecAssertions": [
{
"asn": 64496,
"SKI": "Dulqji-sUM5sX5M-3mqngKaFDjE",
"routerPublicKey": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE-rkSLXlPpL_m-L7CfCfKrv1FHrM55FsIc8fMlnjHE6Y5nTuCn3UgWfCV6sYuGUZzPZ0Ey6AvezmfcELUB87eBA"
}
]
}
}
SEE ALSO
Regular man pages
getaddrinfo(3), services(5), listen(2), rsync(1)
FORTs official documentation
More documentation about FORT validator can be consulted at github repository
(https://github.com/NICMx/FORT-validator) and github website
(https://nicmx.github.io/FORT-validator/)