Not able to block a specific TLS1.3 cipher
Akhil Pillai
akhilpillai101 at gmail.com
Thu Apr 24 11:09:11 UTC 2025
Here's an interesting thread that i read in stackoverflow , it mentions
that the cipher we put under cipher_list is compared by the OpenSSL against
the tls1.2 ciphers(Which might be true,since i am able to add specific
tls1.2 ciphers and it works). For tls1.3, they did suggest to use
tls_ciphersuites within the eap file. I tried this , freeradius is up and
running, but in the debug out, it doesnt mention the cipher details at all.
I assume there is no option to set tls1.3 ciphers? or is there any other
way to let the OpenSSL know the ciphers we want to use?
Below is the debug out when i used tls_ciphersuites
root at 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_server_preference = no
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
}
}
# Linked to sub-module rlm_eap_ttls
ttls {
tls = "tls-common"
default_eap_type = "tls"
copy_request_to_tunnel = yes
use_tunneled_reply = no
virtual_server = "inner-tunnel"
include_length = yes
require_client_cert = no
}
tls: Using cached TLS configuration from previous invocation
# Linked to sub-module rlm_eap_peap
peap {
tls = "tls-common"
default_eap_type = "mschapv2"
copy_request_to_tunnel = no
use_tunneled_reply = no
proxy_tunneled_request_as_eap = yes
virtual_server = "inner-tunnel"
soh = no
require_client_cert = no
}
tls: Using cached TLS configuration from previous invocation
# Linked to sub-module rlm_eap_mschapv2
mschapv2 {
with_ntdomain_hack = no
send_error = no
}
# Instantiating module "pap" from file /etc/freeradius3/mods-enabled/pap
# Instantiating module "preprocess" from file
/etc/freeradius3/mods-enabled/preprocess
reading pairlist file /etc/freeradius3/mods-config/preprocess/huntgroups
reading pairlist file /etc/freeradius3/mods-config/preprocess/hints
# Instantiating module "attr_filter.post-proxy" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file /etc/freeradius3/mods-config/attr_filter/post-proxy
# Instantiating module "attr_filter.pre-proxy" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file /etc/freeradius3/mods-config/attr_filter/pre-proxy
# Instantiating module "attr_filter.access_reject" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file /etc/freeradius3/mods-config/attr_filter/access_reject
# Instantiating module "attr_filter.access_challenge" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file
/etc/freeradius3/mods-config/attr_filter/access_challenge
# Instantiating module "attr_filter.accounting_response" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file
/etc/freeradius3/mods-config/attr_filter/accounting_response
# Instantiating module "attr_filter.coa" from file
/etc/freeradius3/mods-enabled/attr_filter
reading pairlist file /etc/freeradius3/mods-config/attr_filter/coa
# Instantiating module "mschap" from file
/etc/freeradius3/mods-enabled/mschap
rlm_mschap (mschap): using internal authentication
# Instantiating module "logintime" from file
/etc/freeradius3/mods-enabled/logintime
# Instantiating module "etc_passwd" from file
/etc/freeradius3/mods-enabled/passwd
rlm_passwd: nfields: 3 keyfield 0(User-Name) listable: no
# Instantiating module "files" from file
/etc/freeradius3/mods-enabled/files
reading pairlist file /etc/freeradius3/mods-config/files/authorize
reading pairlist file /etc/freeradius3/mods-config/files/accounting
reading pairlist file /etc/freeradius3/mods-config/files/pre-proxy
# Instantiating module "IPASS" from file
/etc/freeradius3/mods-enabled/realm
# Instantiating module "suffix" from file
/etc/freeradius3/mods-enabled/realm
# Instantiating module "bangpath" from file
/etc/freeradius3/mods-enabled/realm
# Instantiating module "realmpercent" from file
/etc/freeradius3/mods-enabled/realm
# Instantiating module "ntdomain" from file
/etc/freeradius3/mods-enabled/realm
# Instantiating module "reject" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "fail" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "ok" from file /etc/freeradius3/mods-enabled/always
# Instantiating module "handled" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "invalid" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "userlock" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "notfound" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "noop" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "updated" from file
/etc/freeradius3/mods-enabled/always
# Instantiating module "detail" from file
/etc/freeradius3/mods-enabled/detail
# Instantiating module "expiration" from file
/etc/freeradius3/mods-enabled/expiration
} # modules
radiusd: #### Loading Virtual Servers ####
server { # from file /etc/freeradius3/radiusd.conf
} # server
server default { # from file /etc/freeradius3/sites-enabled/default
# Loading authenticate {...}
# Loading authorize {...}
Compiling Autz-Type New-TLS-Connection for attr Autz-Type
# Loading preacct {...}
# Loading accounting {...}
# Loading post-proxy {...}
# Loading post-auth {...}
Ignoring "sql" (see raddb/mods-available/README.rst)
Compiling Post-Auth-Type REJECT for attr Post-Auth-Type
Compiling Post-Auth-Type Challenge for attr Post-Auth-Type
Compiling Post-Auth-Type Client-Lost for attr Post-Auth-Type
} # server default
server inner-tunnel { # from file
/etc/freeradius3/sites-enabled/inner-tunnel
# Loading authenticate {...}
Compiling Auth-Type PAP for attr Auth-Type
Compiling Auth-Type CHAP for attr Auth-Type
Compiling Auth-Type MS-CHAP for attr Auth-Type
# Loading authorize {...}
Ignoring "ldap" (see raddb/mods-available/README.rst)
# Loading session {...}
# Loading post-proxy {...}
# Loading post-auth {...}
# Skipping contents of 'if' as it is always 'false' --
/etc/freeradius3/sites-enabled/inner-tunnel:366
Compiling Post-Auth-Type REJECT for attr Post-Auth-Type
} # server inner-tunnel
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = *
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
type = "acct"
ipaddr = *
port = 0
limit {
max_connections = 16
lifetime = 0
idle_timeout = 30
}
}
listen {
type = "auth"
ipaddr = 127.0.0.1
port = 18120
}
Listening on auth address * port 1812 bound to server default
Listening on acct address * port 1813 bound to server default
Listening on auth address 127.0.0.1 port 18120 bound to server inner-tunnel
Ready to process requests
On Thu, Apr 24, 2025 at 4:23 PM Alan DeKok <aland at deployingradius.com>
wrote:
> On Apr 24, 2025, at 6:49 AM, Akhil Pillai <akhilpillai101 at gmail.com>
> wrote:
> >
> > Below is the list of ciphers supported by the openssl version that i have
> > currently.
>
> FreeRADIUS takes the string from "cipher_list", and passes it to
> OpenSSL. If OpenSSL doesn't like that string, blame OpenSSL.
>
> Alan DeKok.
>
> -
> List info/subscribe/unsubscribe? See
> http://www.freeradius.org/list/users.html
>
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