Not able to block a specific TLS1.3 cipher

24 Apr 2025

      Hello All,

I have been trying to use only a specific tls1.3 cipher but it fails.  I
want to use only SHA256.  Below is the debug out.

root@WIFI_TLS1:~# vi /etc/freeradius3/mods-enabled/eap
root@WIFI_TLS1:~# radiusd -Xf
FreeRADIUS Version 3.2.5
Copyright (C) 1999-2023 The FreeRADIUS server project and contributors
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE
You may redistribute copies of FreeRADIUS under the terms of the
GNU General Public License
For more information about these matters, see the file named COPYRIGHT
Starting - reading configuration files ...
including dictionary file /usr/share/freeradius3/dictionary
including dictionary file /etc/freeradius3/dictionary
including configuration file /etc/freeradius3/radiusd.conf
including configuration file /etc/freeradius3/clients.conf
including files in directory /etc/freeradius3/mods-enabled/
including configuration file /etc/freeradius3/mods-enabled/eap
including configuration file /etc/freeradius3/mods-enabled/pap
including configuration file /etc/freeradius3/mods-enabled/preprocess
including configuration file /etc/freeradius3/mods-enabled/chap
including configuration file /etc/freeradius3/mods-enabled/exec
including configuration file /etc/freeradius3/mods-enabled/expr
including configuration file /etc/freeradius3/mods-enabled/unix
including configuration file /etc/freeradius3/mods-enabled/radutmp
including configuration file /etc/freeradius3/mods-enabled/attr_filter
including configuration file /etc/freeradius3/mods-enabled/mschap
including configuration file /etc/freeradius3/mods-enabled/logintime
including configuration file /etc/freeradius3/mods-enabled/passwd
including configuration file /etc/freeradius3/mods-enabled/files
including configuration file /etc/freeradius3/mods-enabled/realm
including configuration file /etc/freeradius3/mods-enabled/sradutmp
including configuration file /etc/freeradius3/mods-enabled/always
including configuration file /etc/freeradius3/mods-enabled/detail
including configuration file /etc/freeradius3/mods-enabled/digest
including configuration file /etc/freeradius3/mods-enabled/expiration
including files in directory /etc/freeradius3/policy.d/
including configuration file /etc/freeradius3/policy.d/eap
including configuration file /etc/freeradius3/policy.d/accounting
including configuration file /etc/freeradius3/policy.d/filter
including files in directory /etc/freeradius3/sites-enabled/
including configuration file /etc/freeradius3/sites-enabled/default
including configuration file /etc/freeradius3/sites-enabled/inner-tunnel
main {
 security {
  allow_core_dumps = no
 }
name = "radiusd"
prefix = "/usr"
localstatedir = "/var"
logdir = "/var/log"
run_dir = "/var/run/radiusd"
}
main {
name = "radiusd"
prefix = "/usr"
localstatedir = "/var"
sbindir = "/usr/sbin"
logdir = "/var/log"
run_dir = "/var/run/radiusd"
libdir = "/usr/lib/freeradius3"
radacctdir = "/var/db/radacct"
hostname_lookups = no
max_request_time = 30
proxy_dedup_window = 1
cleanup_delay = 5
max_requests = 16384
max_fds = 512
postauth_client_lost = no
pidfile = "/var/run/radiusd/radiusd.pid"
checkrad = "/usr/sbin/checkrad"
debug_level = 0
proxy_requests = yes
 log {
  stripped_names = no
  auth = no
  auth_badpass = no
  auth_goodpass = no
  colourise = yes
  msg_denied = "You are already logged in - access denied"
 }
 resources {
 }
 security {
  max_attributes = 200
  reject_delay = 1.000000
  status_server = yes
  require_message_authenticator = "auto"
  limit_proxy_state = "auto"
 }
}
radiusd: #### Loading Realms and Home Servers ####
radiusd: #### Loading Clients ####
 client abc81 {
  ipaddr = 192.168.1.81
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abc83 {
  ipaddr = 192.168.1.83
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcnet {
  ipaddr = 192.168.1.0/24
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcBL020 {
  ipaddr = 192.168.1.20
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcBL002 {
  ipaddr = 192.168.1.92
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcBL016 {
  ipaddr = 192.168.1.96
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcnet {
  ipaddr = 172.27.70.0/24
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client abcnet {
  ipaddr = 172.27.80.0/24
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client localhost {
  ipv4addr = *
  require_message_authenticator = "no"
  secret = <<< secret >>>
  nas_type = "other"
  proto = "*"
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
 client routertest {
  ipaddr = 172.27.70.15
  secret = <<< secret >>>
  limit {
  max_connections = 16
  lifetime = 0
  idle_timeout = 30
  }
 }
Debugger not attached
 # Creating Auth-Type = eap
 # Creating Autz-Type = New-TLS-Connection
 # Creating Auth-Type = mschap
 # Creating Auth-Type = PAP
 # Creating Auth-Type = CHAP
 # Creating Auth-Type = MS-CHAP
radiusd: #### Instantiating modules ####
 modules {
  # Loaded module rlm_eap
  # Loading module "eap" from file /etc/freeradius3/mods-enabled/eap
  eap {
  default_eap_type = "tls"
  timer_expire = 60
  max_eap_type = 52
  ignore_unknown_eap_types = no
  cisco_accounting_username_bug = no
  max_sessions = 16384
  dedup_key = ""
  }
  # Loaded module rlm_pap
  # Loading module "pap" from file /etc/freeradius3/mods-enabled/pap
  pap {
  normalise = yes
  }
  # Loaded module rlm_preprocess
  # Loading module "preprocess" from file
/etc/freeradius3/mods-enabled/preprocess
  preprocess {
  huntgroups = "/etc/freeradius3/mods-config/preprocess/huntgroups"
  hints = "/etc/freeradius3/mods-config/preprocess/hints"
  with_ascend_hack = no
  ascend_channels_per_line = 23
  with_ntdomain_hack = no
  with_specialix_jetstream_hack = no
  with_cisco_vsa_hack = no
  with_alvarion_vsa_hack = no
  }
  # Loaded module rlm_chap
  # Loading module "chap" from file /etc/freeradius3/mods-enabled/chap
  # Loaded module rlm_exec
  # Loading module "exec" from file /etc/freeradius3/mods-enabled/exec
  exec {
  wait = no
  input_pairs = "request"
  shell_escape = yes
  timeout = 10
  }
  # Loaded module rlm_expr
  # Loading module "expr" from file /etc/freeradius3/mods-enabled/expr
  expr {
  safe_characters =
"@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_:
/äéöüàâæçèéêëîïôœùûüaÿÄÉÖÜßÀÂÆÇÈÉÊËÎÏÔŒÙÛÜŸ"
  }
  # Loaded module rlm_unix
  # Loading module "unix" from file /etc/freeradius3/mods-enabled/unix
  unix {
  radwtmp = "/var/log/radwtmp"
  }
Creating attribute Unix-Group
  # Loaded module rlm_radutmp
  # Loading module "radutmp" from file /etc/freeradius3/mods-enabled/radutmp
  radutmp {
  filename = "/var/log/radutmp"
  username = "%{User-Name}"
  case_sensitive = yes
  check_with_nas = yes
  permissions = 384
  caller_id = yes
  }
  # Loaded module rlm_attr_filter
  # Loading module "attr_filter.post-proxy" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.post-proxy {
  filename = "/etc/freeradius3/mods-config/attr_filter/post-proxy"
  key = "%{Realm}"
  relaxed = no
  }
  # Loading module "attr_filter.pre-proxy" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.pre-proxy {
  filename = "/etc/freeradius3/mods-config/attr_filter/pre-proxy"
  key = "%{Realm}"
  relaxed = no
  }
  # Loading module "attr_filter.access_reject" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.access_reject {
  filename = "/etc/freeradius3/mods-config/attr_filter/access_reject"
  key = "%{User-Name}"
  relaxed = no
  }
  # Loading module "attr_filter.access_challenge" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.access_challenge {
  filename = "/etc/freeradius3/mods-config/attr_filter/access_challenge"
  key = "%{User-Name}"
  relaxed = no
  }
  # Loading module "attr_filter.accounting_response" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.accounting_response {
  filename = "/etc/freeradius3/mods-config/attr_filter/accounting_response"
  key = "%{User-Name}"
  relaxed = no
  }
  # Loading module "attr_filter.coa" from file
/etc/freeradius3/mods-enabled/attr_filter
  attr_filter attr_filter.coa {
  filename = "/etc/freeradius3/mods-config/attr_filter/coa"
  key = "%{User-Name}"
  relaxed = no
  }
  # Loaded module rlm_mschap
  # Loading module "mschap" from file /etc/freeradius3/mods-enabled/mschap
  mschap {
  use_mppe = yes
  require_encryption = no
  require_strong = no
  with_ntdomain_hack = yes
   passchange {
   }
  allow_retry = yes
  winbind_retry_with_normalised_username = no
  }
  # Loaded module rlm_logintime
  # Loading module "logintime" from file
/etc/freeradius3/mods-enabled/logintime
  logintime {
  minimum_timeout = 60
  }
  # Loaded module rlm_passwd
  # Loading module "etc_passwd" from file
/etc/freeradius3/mods-enabled/passwd
  passwd etc_passwd {
  filename = "/etc/passwd"
  format = "*User-Name:Crypt-Password:"
  delimiter = ":"
  ignore_nislike = no
  ignore_empty = yes
  allow_multiple_keys = no
  hash_size = 100
  }
  # Loaded module rlm_files
  # Loading module "files" from file /etc/freeradius3/mods-enabled/files
  files {
  filename = "/etc/freeradius3/mods-config/files/authorize"
  acctusersfile = "/etc/freeradius3/mods-config/files/accounting"
  preproxy_usersfile = "/etc/freeradius3/mods-config/files/pre-proxy"
  }
  # Loaded module rlm_realm
  # Loading module "IPASS" from file /etc/freeradius3/mods-enabled/realm
  realm IPASS {
  format = "prefix"
  delimiter = "/"
  ignore_default = no
  ignore_null = no
  }
  # Loading module "suffix" from file /etc/freeradius3/mods-enabled/realm
  realm suffix {
  format = "suffix"
  delimiter = "@"
  ignore_default = no
  ignore_null = no
  }
  # Loading module "bangpath" from file /etc/freeradius3/mods-enabled/realm
  realm bangpath {
  format = "prefix"
  delimiter = "!"
  ignore_default = no
  ignore_null = no
  }
  # Loading module "realmpercent" from file
/etc/freeradius3/mods-enabled/realm
  realm realmpercent {
  format = "suffix"
  delimiter = "%"
  ignore_default = no
  ignore_null = no
  }
  # Loading module "ntdomain" from file /etc/freeradius3/mods-enabled/realm
  realm ntdomain {
  format = "prefix"
  delimiter = "\"
  ignore_default = no
  ignore_null = no
  }
  # Loading module "sradutmp" from file
/etc/freeradius3/mods-enabled/sradutmp
  radutmp sradutmp {
  filename = "/var/log/sradutmp"
  username = "%{User-Name}"
  case_sensitive = yes
  check_with_nas = yes
  permissions = 420
  caller_id = no
  }
  # Loaded module rlm_always
  # Loading module "reject" from file /etc/freeradius3/mods-enabled/always
  always reject {
  rcode = "reject"
  simulcount = 0
  mpp = no
  }
  # Loading module "fail" from file /etc/freeradius3/mods-enabled/always
  always fail {
  rcode = "fail"
  simulcount = 0
  mpp = no
  }
  # Loading module "ok" from file /etc/freeradius3/mods-enabled/always
  always ok {
  rcode = "ok"
  simulcount = 0
  mpp = no
  }
  # Loading module "handled" from file /etc/freeradius3/mods-enabled/always
  always handled {
  rcode = "handled"
  simulcount = 0
  mpp = no
  }
  # Loading module "invalid" from file /etc/freeradius3/mods-enabled/always
  always invalid {
  rcode = "invalid"
  simulcount = 0
  mpp = no
  }
  # Loading module "userlock" from file /etc/freeradius3/mods-enabled/always
  always userlock {
  rcode = "userlock"
  simulcount = 0
  mpp = no
  }
  # Loading module "notfound" from file /etc/freeradius3/mods-enabled/always
  always notfound {
  rcode = "notfound"
  simulcount = 0
  mpp = no
  }
  # Loading module "noop" from file /etc/freeradius3/mods-enabled/always
  always noop {
  rcode = "noop"
  simulcount = 0
  mpp = no
  }
  # Loading module "updated" from file /etc/freeradius3/mods-enabled/always
  always updated {
  rcode = "updated"
  simulcount = 0
  mpp = no
  }
  # Loaded module rlm_detail
  # Loading module "detail" from file /etc/freeradius3/mods-enabled/detail
  detail {
  filename =
"/var/db/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d"
  header = "%t"
  permissions = 384
  locking = no
  dates_as_integer = no
  escape_filenames = no
  log_packet_header = no
  }
  # Loaded module rlm_digest
  # Loading module "digest" from file /etc/freeradius3/mods-enabled/digest
  # Loaded module rlm_expiration
  # Loading module "expiration" from file
/etc/freeradius3/mods-enabled/expiration
  instantiate {
  }
  # Instantiating module "eap" from file /etc/freeradius3/mods-enabled/eap
   # Linked to sub-module rlm_eap_md5
   # Linked to sub-module rlm_eap_gtc
   gtc {
    challenge = "Password: "
    auth_type = "PAP"
   }
   # Linked to sub-module rlm_eap_tls
   tls {
    tls = "tls-common"
   }
   tls-config tls-common {
    verify_depth = 0
    ca_path = "/etc/freeradius3/certs"
    pem_file_type = yes
    private_key_file = "/etc/freeradius3/certs/hostapd.server.prv"
    certificate_file = "/etc/freeradius3/certs/hostapd.server.pem"
    ca_file = "/etc/freeradius3/certs/hostapd.ca.pem"
    private_key_password = <<< secret >>>
    fragment_size = 1024
    include_length = yes
    auto_chain = yes
    check_crl = no
    check_all_crl = no
    ca_path_reload_interval = 0
    cipher_list = "TLS_AES_128_GCM_SHA256"
    cipher_server_preference = yes
    reject_unknown_intermediate_ca = no
    ecdh_curve = ""
    tls_max_version = "1.3"
    tls_min_version = "1.2"
    cache {
    enable = no
    lifetime = 24
    max_entries = 255
    }
    verify {
    skip_if_ocsp_ok = no
    }
    ocsp {
    enable = no
    override_cert_url = yes
    url = "http://127.0.0.1/ocsp/"
    use_nonce = yes
    timeout = 0
    softfail = no
    }
   }
tls: (TLS) Failed setting cipher list: error:0A0000B9:SSL routines::no
cipher match
rlm_eap_tls: Failed initializing SSL context
rlm_eap (EAP): Failed to initialise rlm_eap_tls
/etc/freeradius3/mods-enabled/eap[14]: Instantiation failed for module "eap"

Any idea why this fails?

Not able to block a specific TLS1.3 cipher

Akhil Pillai