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download PDF document: wpa_supplicant.conf.5.pdf

WPA_SUPPLICANT.CONF(5) FreeBSD File Formats Manual WPA_SUPPLICANT.CONF(5)
NAME wpa_supplicant.conf - configuration file for wpa_supplicant(8)
DESCRIPTION The wpa_supplicant(8) utility is an implementation of the WPA Supplicant component, i.e., the part that runs in the client stations. It implements WPA key negotiation with a WPA Authenticator and EAP authentication with Authentication Server using configuration information stored in a text file.
The configuration file consists of optional global parameter settings and one or more network blocks, e.g. one for each used SSID. The wpa_supplicant(8) utility will automatically select the best network based on the order of the network blocks in the configuration file, network security level (WPA/WPA2 is preferred), and signal strength. Comments are indicated with the `#' character; all text to the end of the line will be ignored.
GLOBAL PARAMETERS Default parameters used by wpa_supplicant(8) may be overridden by specifying
parameter=value
in the configuration file (note no spaces are allowed). Values with embedded spaces must be enclosed in quote marks.
The following parameters are recognized:
ctrl_interface The pathname of the directory in which wpa_supplicant(8) creates UNIX domain socket files for communication with frontend programs such as wpa_cli(8).
ctrl_interface_group A group name or group ID to use in setting protection on the control interface file. This can be set to allow non-root users to access the control interface files. If no group is specified, the group ID of the control interface is not modified and will, typically, be the group ID of the directory in which the socket is created.
eapol_version The IEEE 802.1x/EAPOL protocol version to use; either 1 (default) or 2. The wpa_supplicant(8) utility is implemented according to IEEE 802-1X-REV-d8 which defines EAPOL version to be 2. However, some access points do not work when presented with this version so by default wpa_supplicant(8) will announce that it is using EAPOL version 1. If version 2 must be announced for correct operation with an access point, this value may be set to 2.
ap_scan Access point scanning and selection control; one of 0, 1 (default), or 2. Only setting 1 should be used with the wlan(4) module; the other settings are for use on other operating systems.
network blocks are listed in a configuration file, the highest priority one is selected for use or, if multiple networks with the same priority are identified, the first one listed in the configuration file is used.
A network block description is of the form:
network={ parameter=value ... }
(note the leading "network={" may have no spaces). The block specification contains one or more parameters from the following list:
ssid (required) Network name (as announced by the access point). An ASCII or hex string enclosed in quotation marks.
scan_ssid SSID scan technique; 0 (default) or 1. Technique 0 scans for the SSID using a broadcast Probe Request frame. Technique 1 uses directed Probe Request frames, sent to each configured SSID. Access points that cloak themselves by not broadcasting their SSID require technique 1. Beware that this technique can cause scanning to take longer to complete, and exposes the list of configured network SSIDs to eavesdroppers.
bssid Network BSSID (typically the MAC address of the access point).
priority The priority of a network when selecting among multiple networks; a higher value means a network is more desirable. By default networks have priority 0. When multiple networks with the same priority are considered for selection, other information such as security policy and signal strength are used to select one.
mode IEEE 802.11 operation mode; either 0 (infrastructure, default) or 1 (IBSS). Note that IBSS (adhoc) mode can only be used with key_mgmt set to NONE (plaintext and static WEP), or key_mgmt set to WPA-NONE (fixed group key TKIP/CCMP). In addition, ap_scan has to be set to 2 for IBSS. WPA-NONE requires proto set to WPA, key_mgmt set to WPA-NONE, pairwise set to NONE, group set to either CCMP or TKIP (but not both), and psk must also be set.
proto List of acceptable protocols; one or more of: WPA (IEEE 802.11i/D3.0) and RSN (IEEE 802.11i). WPA2 is another name for RSN. If not set this defaults to "WPA RSN".
key_mgmt List of acceptable key management protocols; one or more of: WPA-PSK (WPA pre-shared key), WPA-EAP (WPA using EAP authentication), IEEE8021X (IEEE 802.1x using EAP authentication and, optionally, dynamically generated WEP keys), NONE (plaintext or static WEP keys). If not set this defaults to "WPA-PSK WPA-EAP".
auth_alg List of allowed IEEE 802.11 authentication algorithms; one or more of: OPEN (Open System authentication, required for 802.11i/D7.0), TKIP (Temporal Key Integrity Protocol, IEEE 802.11i/D7.0), NONE (deprecated). If not set this defaults to "CCMP TKIP".
group List of acceptable group (multicast) ciphers for WPA; one or more of: CCMP (AES in Counter mode with CBC-MAC, RFC 3610, IEEE 802.11i/D7.0), TKIP (Temporal Key Integrity Protocol, IEEE 802.11i/D7.0), WEP104 (WEP with 104-bit key), WEP40 (WEP with 40-bit key). If not set this defaults to "CCMP TKIP WEP104 WEP40".
psk WPA preshared key used in WPA-PSK mode. The key is specified as 64 hex digits or as an 8-63 character ASCII passphrase. ASCII passphrases are dynamically converted to a 256-bit key at runtime using the network SSID, or they can be statically converted at configuration time using the wpa_passphrase(8) utility.
eapol_flags Dynamic WEP key usage for non-WPA mode, specified as a bit field. Bit 0 (1) forces dynamically generated unicast WEP keys to be used. Bit 1 (2) forces dynamically generated broadcast WEP keys to be used. By default this is set to 3 (use both).
eap List of acceptable EAP methods; one or more of: MD5 (EAP-MD5, cannot be used with WPA, used only as a Phase 2 method with EAP- PEAP or EAP-TTLS), MSCHAPV2 (EAP-MSCHAPV2, cannot be used with WPA; used only as a Phase 2 method with EAP-PEAP or EAP-TTLS), OTP (EAP-OTP, cannot be used with WPA; used only as a Phase 2 metod with EAP-PEAP or EAP-TTLS), GTC (EAP-GTC, cannot be used with WPA; used only as a Phase 2 metod with EAP-PEAP or EAP- TTLS), TLS (EAP-TLS, client and server certificate), PEAP (EAP- PEAP, with tunneled EAP authentication), TTLS (EAP-TTLS, with tunneled EAP or PAP/CHAP/MSCHAP/MSCHAPV2 authentication). If not set this defaults to all available methods compiled in to wpa_supplicant(8). Note that by default wpa_supplicant(8) is compiled with EAP support; see make.conf(5) for the NO_WPA_SUPPLICANT_EAPOL configuration variable that can be used to disable EAP support.
identity Identity string for EAP.
anonymous_identity Anonymous identity string for EAP (to be used as the unencrypted identity with EAP types that support different tunneled identities; e.g. EAP-TTLS).
mixed_cell Configure whether networks that allow both plaintext and encryption are allowed when selecting a BSS from the scan results. By default this is set to 0 (disabled).
password Password string for EAP.
ca_cert Pathname to CA certificate file. This file can have one or more trusted CA certificates. If ca_cert is not included, server certificates will not be verified (not recommended). specified as both the private key and certificate will be read from PKCS#12 file.
private_key_passwd Password for any private key file.
dh_file Pathname to a file holding DH/DSA parameters (in PEM format). This file holds parameters for an ephemeral DH key exchange. In most cases, the default RSA authentication does not use this configuration. However, it is possible to set up RSA to use an ephemeral DH key exchange. In addition, ciphers with DSA keys always use ephemeral DH keys. This can be used to achieve forward secrecy. If the dh_file is in DSA parameters format, it will be automatically converted into DH parameters.
subject_match Substring to be matched against the subject of the authentication server certificate. If this string is set, the server certificate is only accepted if it contains this string in the subject. The subject string is in following format:
/C=US/ST=CA/L=San Francisco/CN=Test AS/emailAddress=as@example.com
phase1 Phase1 (outer authentication, i.e., TLS tunnel) parameters (string with field-value pairs, e.g., "peapver=0" or "peapver=1 peaplabel=1").
peapver can be used to force which PEAP version (0 or 1) is used.
peaplabel=1 can be used to force new label, "client PEAP encryption", to be used during key derivation when PEAPv1 or newer. Most existing PEAPv1 implementations seem to be using the old label, "client EAP encryption", and wpa_supplicant(8) is now using that as the default value. Some servers, e.g., Radiator, may require peaplabel=1 configuration to interoperate with PEAPv1; see eap_testing.txt for more details.
peap_outer_success=0 can be used to terminate PEAP authentication on tunneled EAP-Success. This is required with some RADIUS servers that implement draft-josefsson-pppext-eap-tls-eap-05.txt (e.g., Lucent NavisRadius v4.4.0 with PEAP in "IETF Draft 5" mode).
include_tls_length=1 can be used to force wpa_supplicant(8) to include TLS Message Length field in all TLS messages even if they are not fragmented.
sim_min_num_chal=3 can be used to configure EAP-SIM to require three challenges (by default, it accepts 2 or 3).
fast_provisioning=1 option enables in-line provisioning of EAP- FAST credentials (PAC).
phase2 phase2: Phase2 (inner authentication with TLS tunnel) parameters (string with field-value pairs, e.g., "auth=MSCHAPV2" for EAP- PEAP or "autheap=MSCHAPV2 autheap=MD5" for EAP-TTLS).
Like private_key but for EAP inner Phase 2.
private_key2_passwd Like private_key_passwd but for EAP inner Phase 2.
dh_file2 Like dh_file but for EAP inner Phase 2.
subject_match2 Like subject_match but for EAP inner Phase 2.
eappsk 16-byte pre-shared key in hex format for use with EAP-PSK.
nai User NAI for use with EAP-PSK.
server_nai Authentication Server NAI for use with EAP-PSK.
pac_file Pathname to the file to use for PAC entries with EAP-FAST. The wpa_supplicant(8) utility must be able to create this file and write updates to it when PAC is being provisioned or refreshed.
eap_workaround Enable/disable EAP workarounds for various interoperability issues with misbehaving authentication servers. By default these workarounds are enabled. Strict EAP conformance can be configured by setting this to 0.
wep_tx_keyidx which key to use for transmission of packets.
wep_keyN key An ASCII string enclosed in quotation marks to encode the WEP key. Without quotes this is a hex string of the actual key. WEP is considered insecure and should be avoided. The exact translation from an ASCII key to a hex key varies. Use hex keys where possible.
CERTIFICATES Some EAP authentication methods require use of certificates. EAP-TLS uses both server- and client-side certificates, whereas EAP-PEAP and EAP- TTLS only require a server-side certificate. When a client certificate is used, a matching private key file must also be included in configuration. If the private key uses a passphrase, this has to be configured in the wpa_supplicant.conf file as private_key_passwd.
The wpa_supplicant(8) utility supports X.509 certificates in PEM and DER formats. User certificate and private key can be included in the same file.
If the user certificate and private key is received in PKCS#12/PFX format, they need to be converted to a suitable PEM/DER format for use by wpa_supplicant(8). This can be done using the openssl(1) program, e.g. with the following commands:
# convert client certificate and private key to PEM format openssl pkcs12 -in example.pfx -out user.pem -clcerts # convert CA certificate (if included in PFX file) to PEM format WPA-Personal (PSK) as a home network and WPA-Enterprise with EAP-TLS as a work network:
# allow frontend (e.g., wpa_cli) to be used by all users in 'wheel' group ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel # # home network; allow all valid ciphers network={ ssid="home" scan_ssid=1 key_mgmt=WPA-PSK psk="very secret passphrase" } # # work network; use EAP-TLS with WPA; allow only CCMP and TKIP ciphers network={ ssid="work" scan_ssid=1 key_mgmt=WPA-EAP pairwise=CCMP TKIP group=CCMP TKIP eap=TLS identity="user@example.com" ca_cert="/etc/cert/ca.pem" client_cert="/etc/cert/user.pem" private_key="/etc/cert/user.prv" private_key_passwd="password" }
WPA-RADIUS/EAP-PEAP/MSCHAPv2 with RADIUS servers that use old peaplabel (e.g., Funk Odyssey and SBR, Meetinghouse Aegis, Interlink RAD-Series):
ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel network={ ssid="example" scan_ssid=1 key_mgmt=WPA-EAP eap=PEAP identity="user@example.com" password="foobar" ca_cert="/etc/cert/ca.pem" phase1="peaplabel=0" phase2="auth=MSCHAPV2" }
EAP-TTLS/EAP-MD5-Challenge configuration with anonymous identity for the unencrypted use. Real identity is sent only within an encrypted TLS tunnel.
ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel network={ ssid="example" scan_ssid=1 key_mgmt=WPA-EAP eap=TTLS identity="user@example.com"
Note the WEP key is not quoted.
ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel network={ ssid="example" scan_ssid=1 key_mgmt=NONE wep_tx_keyidx=0 # hex keys denoted without quotes wep_key0=42FEEDDEAFBABEDEAFBEEFAA55 # ASCII keys denoted with quotes. wep_key1="FreeBSDr0cks!" }
Minimal eduroam configuration.
ctrl_interface=/var/run/wpa_supplicant ctrl_interface_group=wheel network={ ssid="eduroam" scan_ssid=1 key_mgmt=WPA-EAP eap=TTLS identity="user@example.org" password="foobar" phase2="auth=MSCHAPV2" }
SEE ALSO wpa_cli(8), wpa_passphrase(8), wpa_supplicant(8)
HISTORY The wpa_supplicant.conf manual page and wpa_supplicant(8) functionality first appeared in FreeBSD 6.0.
AUTHORS This manual page is derived from the README and wpa_supplicant.conf files in the wpa_supplicant distribution provided by Jouni Malinen <j@w1.fi>.
FreeBSD 14.0-RELEASE-p11 March 16, 2022 FreeBSD 14.0-RELEASE-p11