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certbot/certbot

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any other CA that uses the ACME protocol. · Python · 226 source files

Analyzed at 2b817be146 on 2026-08-27. 33 documented errors.

Code / MessageTypeSeverityTags
Invalid private key type: {type(private_key)}
validation error acme, csr, private-key, validation
At least one of domains or ipaddrs parameter need to be not
validation error acme, csr, validation, arguments
Encoding must be PEM or DER
validation error acme, certificates, encoding, validation
The supplied code: %s is not a known ACME error code
validation error acme, error-codes, validation
Invalid value for hmac_alg: {hmac_alg}. Expected one of: {su
validation error acme, eab, hmac, validation
Could not bind to IPv4 or IPv6.
error_code error acme, standalone, network, bind
deploy of IP address certificate not supported
validation error certbot, ip-certificate, deployment
enhancements not supported for IP address certificates
validation error certbot, ip-certificate, enhancements, install
OS option restart_cmd_alt must be set for CentOS.
validation error certbot, apache, centos, configuration
OS option restart_cmd_alt must be set for Fedora.
validation error certbot, apache, fedora, configuration
OS option restart_cmd_alt must be set for Gentoo.
validation error certbot, apache, gentoo, configuration
Required keyword argument: {} undefined.
validation error certbot, apache, parser, arguments
Unknown keyword argument(s): {}
validation error certbot, apache, parser, arguments
Duplicate plugin name {0} from {1} and {2}.
error_code critical certbot, plugins, packaging, entry-points
encountered UNIX-domain socket address {str_addr}
validation error certbot, nginx, unix-socket, config-parsing
Unrecognized value of SNAP_ARCH: {0}
error_code error certbot, snap, architecture, environment
EEXIST
%s
error_code error certbot, windows, filesystem, errno
EACCES
%s
error_code error certbot, windows, file-lock, errno
Error, link {0} is a loop!
error_code error certbot, windows, symlink, filesystem
Long paths are not supported by Certbot on Windows.
validation error windows, filesystem, path-length, symlink, certbot
Cannot meaningfully compare LooseVersion {} with LooseVersio
exception error versioning, comparison, certbot, python
AnnotatedChallenge takes either domain or identifier, not bo
exception error certbot, acme, constructor-arguments, migration
The domain attribute is deprecated and will be removed in an
console warning certbot, acme, deprecation, attribute-access
The domain attribute is deprecated and will be removed in an
console warning certbot, acme, deprecation, constructor-arguments
acme.crypto_util.Format is deprecated and will be removed in
console warning acme, certbot, deprecation, module-proxy, enum
make_self_signed_cert is deprecated and will be removed in a
console warning acme, certbot, deprecation, self-signed-certificate, x509
certbot.crypto_util.import_csr_file is deprecated and will b
console warning certbot, deprecation, csr, pkix
get_sans_from_cert is deprecated and will be removed in the
console warning certbot, deprecation, certificate, san, x509
get_names_from_cert is deprecated and will be removed in the
console warning certbot, deprecation, certificate, x509
get_names_from_req is deprecated and will be removed in the
console warning certbot, deprecation, csr, pkix
certbot.ocsp is deprecated and will be removed in the next m
console warning certbot, deprecation, ocsp, import-time, module-shim
{attr} attribute in {__name__} module is deprecated and will
console warning certbot, deprecation, dns-plugin, lexicon, module-proxy
{attr} attribute in {__name__} module is deprecated and will
console warning certbot, deprecation, testing, dns-plugin, lexicon