Freeradius2 with mOTP for 2 factor SSH authentication question

sdb1031

Hi,
My goal is to have the ability to have 2 factor SSH authentication to my PFsense firewall. I'm new to Pfsense, so I'm hoping that my approach is sound….
I have Freeradius 2.1.12 installed on Pfsense 2.0.1. I have a radius test user defined and configured to use a one time password. This same account is also configured as an ssh user. I receive the "Access-Accept" message when using the radtest utility for my radius test account when using the appropriate one time password. So far so good.

I then modified /etc/pam.d/sshd file to include the following line "auth sufficient pam_radius.so". The full file is as follows:

PAM configuration for the "sshd" service

auth

auth sufficient pam_opie.so no_warn no_fake_prompts
auth requisite pam_opieaccess.so no_warn allow_local
#auth sufficient pam_krb5.so no_warn try_first_pass
#auth sufficient pam_ssh.so no_warn try_first_pass
auth sufficient pam_radius.so
auth required pam_unix.so no_warn try_first_pass

account

account required pam_nologin.so
#account required pam_krb5.so
account required pam_login_access.so
account required pam_unix.so

session

#session optional pam_ssh.so
session required pam_permit.so

password

#password sufficient pam_krb5.so no_warn try_first_pass
password required pam_unix.so no_warn try_first_pass

I then restarted the system and attempted to log in to via ssh using my radius test user account. I am promted for a "RADIUS password", but the RADIUS one time password is not accepted. After 3 attempts, ssh prompts for the ssh password which i can then log in with, but my desire is to use the ssh password along with the mOTP password. On the System log tab in the gui, I see the following error:

sshd[7949]: rad_config: Cannot open "/etc/radius.conf": No such file or directory

I can confirm that there is no /etc/radius.conf file on the system. If this file is required, I'm not sure how it gets generated or what its contents should be. I also tried troubleshooting this by running /usr/local/etc/raddb/radiusd -X, which produces the output seen below. When I attempt to log in to ssh there is no change in the last status message that reads "Listening on authentication address…". So it appears that the authentication information is not being passed from sshd to freeradius. In my testing i've defined the Radius interface as 127.0.0.1 and 10.1.1.1 with no change in the results.

Any Ideas???

FreeRADIUS Version 2.1.12, for host i386-portbld-freebsd8.1, built on Jan 3 2012 at 23:44:16
Copyright (C) 1999-2009 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 v2.
Starting - reading configuration files …
including configuration file /usr/local/etc/raddb/radiusd.conf
including configuration file /usr/local/etc/raddb/clients.conf
including files in directory /usr/local/etc/raddb/modules/
including configuration file /usr/local/etc/raddb/modules/wimax
including configuration file /usr/local/etc/raddb/modules/always
including configuration file /usr/local/etc/raddb/modules/attr_filter
including configuration file /usr/local/etc/raddb/modules/attr_rewrite
including configuration file /usr/local/etc/raddb/modules/chap
including configuration file /usr/local/etc/raddb/modules/checkval
including configuration file /usr/local/etc/raddb/modules/counter
including configuration file /usr/local/etc/raddb/modules/cui
including configuration file /usr/local/etc/raddb/modules/detail
including configuration file /usr/local/etc/raddb/modules/detail.example.com
including configuration file /usr/local/etc/raddb/modules/detail.log
including configuration file /usr/local/etc/raddb/modules/digest
including configuration file /usr/local/etc/raddb/modules/dynamic_clients
including configuration file /usr/local/etc/raddb/modules/echo
including configuration file /usr/local/etc/raddb/modules/etc_group
including configuration file /usr/local/etc/raddb/modules/exec
including configuration file /usr/local/etc/raddb/modules/expiration
including configuration file /usr/local/etc/raddb/modules/expr
including configuration file /usr/local/etc/raddb/modules/files
including configuration file /usr/local/etc/raddb/modules/inner-eap
including configuration file /usr/local/etc/raddb/modules/ippool
including configuration file /usr/local/etc/raddb/modules/krb5
including configuration file /usr/local/etc/raddb/modules/ldap
including configuration file /usr/local/etc/raddb/modules/linelog
including configuration file /usr/local/etc/raddb/modules/logintime
including configuration file /usr/local/etc/raddb/modules/mac2ip
including configuration file /usr/local/etc/raddb/modules/mschap
including configuration file /usr/local/etc/raddb/modules/mac2vlan
including configuration file /usr/local/etc/raddb/modules/ntlm_auth
including configuration file /usr/local/etc/raddb/modules/opendirectory
including configuration file /usr/local/etc/raddb/modules/otp
including configuration file /usr/local/etc/raddb/modules/pam
including configuration file /usr/local/etc/raddb/modules/pap
including configuration file /usr/local/etc/raddb/modules/passwd
including configuration file /usr/local/etc/raddb/modules/perl
including configuration file /usr/local/etc/raddb/modules/policy
including configuration file /usr/local/etc/raddb/modules/preprocess
including configuration file /usr/local/etc/raddb/modules/radutmp
including configuration file /usr/local/etc/raddb/modules/realm
including configuration file /usr/local/etc/raddb/modules/redis
including configuration file /usr/local/etc/raddb/modules/rediswho
including configuration file /usr/local/etc/raddb/modules/replicate
including configuration file /usr/local/etc/raddb/modules/smbpasswd
including configuration file /usr/local/etc/raddb/modules/smsotp
including configuration file /usr/local/etc/raddb/modules/soh
including configuration file /usr/local/etc/raddb/modules/sql_log
including configuration file /usr/local/etc/raddb/modules/sqlcounter_expire_on_login
including configuration file /usr/local/etc/raddb/modules/sradutmp
including configuration file /usr/local/etc/raddb/modules/unix
including configuration file /usr/local/etc/raddb/modules/acct_unique
including configuration file /usr/local/etc/raddb/modules/motp
including configuration file /usr/local/etc/raddb/modules/datacounter_acct
including configuration file /usr/local/etc/raddb/eap.conf
including configuration file /usr/local/etc/raddb/policy.conf
including files in directory /usr/local/etc/raddb/sites-enabled/
including configuration file /usr/local/etc/raddb/sites-enabled/default
main {
allow_core_dumps = no
}
including dictionary file /usr/local/etc/raddb/dictionary
main {
name = "radiusd"
prefix = "/usr/local"
localstatedir = "/var"
sbindir = "/usr/local/sbin"
logdir = "/var/log"
run_dir = "/var/run"
libdir = "/usr/local/lib/freeradius-2.1.12"
radacctdir = "/var/log/radacct"
hostname_lookups = no
max_request_time = 30
cleanup_delay = 5
max_requests = 1024
pidfile = "/var/run/radiusd.pid"
checkrad = "/usr/local/sbin/checkrad"
debug_level = 0
proxy_requests = yes
log {
stripped_names = no
auth = yes
auth_badpass = no
auth_goodpass = no
msg_badpass = ""
msg_goodpass = ""
}
security {
max_attributes = 200
reject_delay = 1
status_server = no
}
}
radiusd: #### Loading Realms and Home Servers ####
radiusd: #### Loading Clients ####
client local {
ipaddr = 127.0.0.1
require_message_authenticator = no
secret = "test123"
shortname = "local"
nastype = "other"
}
radiusd: #### Instantiating modules ####
instantiate {
Module: Linked to module rlm_exec
Module: Instantiating module "exec" from file /usr/local/etc/raddb/modules/exec
exec {
wait = no
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_expr
Module: Instantiating module "expr" from file /usr/local/etc/raddb/modules/expr
Module: Linked to module rlm_counter
Module: Instantiating module "daily" from file /usr/local/etc/raddb/modules/counter
counter daily {
filename = "/var/log/radacct/timecounter/db.daily"
key = "User-Name"
reset = "daily"
count-attribute = "Acct-Session-Time"
counter-name = "Daily-Session-Time"
check-name = "Max-Daily-Session"
reply-name = "Session-Timeout"
cache-size = 5000
}
rlm_counter: Counter attribute Daily-Session-Time is number 11273
rlm_counter: Current Time: 1335318792 [2012-04-25 01:53:12], Next reset 1335398400 [2012-04-26 00:00:00]
Module: Instantiating module "weekly" from file /usr/local/etc/raddb/modules/counter
counter weekly {
filename = "/var/log/radacct/timecounter/db.weekly"
key = "User-Name"
reset = "weekly"
count-attribute = "Acct-Session-Time"
counter-name = "Weekly-Session-Time"
check-name = "Max-Weekly-Session"
reply-name = "Session-Timeout"
cache-size = 5000
}
rlm_counter: Counter attribute Weekly-Session-Time is number 11275
rlm_counter: Current Time: 1335318792 [2012-04-25 01:53:12], Next reset 1335657600 [2012-04-29 00:00:00]
Module: Instantiating module "monthly" from file /usr/local/etc/raddb/modules/counter
counter monthly {
filename = "/var/log/radacct/timecounter/db.monthly"
key = "User-Name"
reset = "monthly"
count-attribute = "Acct-Session-Time"
counter-name = "Monthly-Session-Time"
check-name = "Max-Monthly-Session"
reply-name = "Session-Timeout"
cache-size = 5000
}
rlm_counter: Counter attribute Monthly-Session-Time is number 11277
rlm_counter: Current Time: 1335318792 [2012-04-25 01:53:12], Next reset 1335830400 [2012-05-01 00:00:00]
Module: Instantiating module "forever" from file /usr/local/etc/raddb/modules/counter
counter forever {
filename = "/var/log/radacct/timecounter/db.forever"
key = "User-Name"
reset = "never"
count-attribute = "Acct-Session-Time"
counter-name = "Forever-Session-Time"
check-name = "Max-Forever-Session"
reply-name = "Session-Timeout"
cache-size = 5000
}
rlm_counter: Counter attribute Forever-Session-Time is number 11279
rlm_counter: Current Time: 1335318792 [2012-04-25 01:53:12], Next reset 0 [2012-04-25 01:00:00]
Module: Linked to module rlm_expiration
Module: Instantiating module "expiration" from file /usr/local/etc/raddb/modules/expiration
expiration {
reply-message = "Password Has Expired "
}
Module: Linked to module rlm_logintime
Module: Instantiating module "logintime" from file /usr/local/etc/raddb/modules/logintime
logintime {
reply-message = "You are calling outside your allowed timespan "
minimum-timeout = 60
}
}
radiusd: #### Loading Virtual Servers ####
server { # from file /usr/local/etc/raddb/radiusd.conf
modules {
Module: Creating Auth-Type = MOTP
Module: Creating Auth-Type = digest
Module: Creating Autz-Type = Status-Server
Module: Creating Acct-Type = Status-Server
Module: Creating Post-Auth-Type = REJECT
Module: Checking authenticate {…} for more modules to load
Module: Linked to module rlm_pap
Module: Instantiating module "pap" from file /usr/local/etc/raddb/modules/pap
pap {
encryption_scheme = "auto"
auto_header = no
}
Module: Linked to module rlm_chap
Module: Instantiating module "chap" from file /usr/local/etc/raddb/modules/chap
Module: Linked to module rlm_mschap
Module: Instantiating module "mschap" from file /usr/local/etc/raddb/modules/mschap
mschap {
use_mppe = yes
require_encryption = no
require_strong = no
with_ntdomain_hack = yes
allow_retry = yes
}
Module: Instantiating module "motp" from file /usr/local/etc/raddb/modules/motp
exec motp {
wait = yes
program = "/usr/local/bin/bash /usr/local/etc/raddb/scripts/otpverify.sh %{request:User-Name} %{request:User-Password} %{reply:MOTP-Init-Secret} %{reply:MOTP-PIN} %{reply:MOTP-Offset}"
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_digest
Module: Instantiating module "digest" from file /usr/local/etc/raddb/modules/digest
Module: Linked to module rlm_pam
Module: Instantiating module "pam" from file /usr/local/etc/raddb/modules/pam
pam {
pam_auth = "radiusd"
}
Module: Linked to module rlm_unix
Module: Instantiating module "unix" from file /usr/local/etc/raddb/modules/unix
unix {
radwtmp = "/var/log/radwtmp"
}
Module: Linked to module rlm_eap
Module: Instantiating module "eap" from file /usr/local/etc/raddb/eap.conf
eap {
default_eap_type = "md5"
timer_expire = 60
ignore_unknown_eap_types = no
cisco_accounting_username_bug = no
max_sessions = 4096
}
Module: Linked to sub-module rlm_eap_md5
Module: Instantiating eap-md5
Module: Linked to sub-module rlm_eap_leap
Module: Instantiating eap-leap
Module: Linked to sub-module rlm_eap_gtc
Module: Instantiating eap-gtc
gtc {
challenge = "Password: "
auth_type = "PAP"
}
Module: Linked to sub-module rlm_eap_tls
Module: Instantiating eap-tls
tls {
rsa_key_exchange = no
dh_key_exchange = yes
rsa_key_length = 512
dh_key_length = 512
verify_depth = 0
CA_path = "/usr/local/etc/raddb/certs"
pem_file_type = yes
private_key_file = "/usr/local/etc/raddb/certs/server.pem"
certificate_file = "/usr/local/etc/raddb/certs/server.pem"
CA_file = "/usr/local/etc/raddb/certs/ca.pem"
private_key_password = "whatever"
dh_file = "/usr/local/etc/raddb/certs/dh"
random_file = "/usr/local/etc/raddb/certs/random"
fragment_size = 1024
include_length = yes
check_crl = no
cipher_list = "DEFAULT"
ecdh_curve = "prime256v1"
cache {
enable = no
lifetime = 24
max_entries = 255
}
verify {
}
ocsp {
enable = no
override_cert_url = no
url = "http://127.0.0.1/ocsp/"
}
}
Module: Linked to sub-module rlm_eap_ttls
Module: Instantiating eap-ttls
ttls {
default_eap_type = "md5"
copy_request_to_tunnel = no
use_tunneled_reply = no
include_length = yes
}
Module: Linked to sub-module rlm_eap_peap
Module: Instantiating eap-peap
peap {
default_eap_type = "mschapv2"
copy_request_to_tunnel = no
use_tunneled_reply = no
proxy_tunneled_request_as_eap = yes
soh = no
}
Module: Linked to sub-module rlm_eap_mschapv2
Module: Instantiating eap-mschapv2
mschapv2 {
with_ntdomain_hack = no
send_error = no
}
Module: Checking authorize {...} for more modules to load
Module: Linked to module rlm_preprocess
Module: Instantiating module "preprocess" from file /usr/local/etc/raddb/modules/preprocess
preprocess {
huntgroups = "/usr/local/etc/raddb/huntgroups"
hints = "/usr/local/etc/raddb/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
}
Module: Linked to module rlm_realm
Module: Instantiating module "suffix" from file /usr/local/etc/raddb/modules/realm
realm suffix {
format = "suffix"
delimiter = "@"
ignore_default = no
ignore_null = yes
}
Module: Instantiating module "ntdomain" from file /usr/local/etc/raddb/modules/realm
realm ntdomain {
format = "prefix"
delimiter = ""
ignore_default = no
ignore_null = yes
}
Module: Linked to module rlm_files
Module: Instantiating module "files" from file /usr/local/etc/raddb/modules/files
files {
usersfile = "/usr/local/etc/raddb/users"
acctusersfile = "/usr/local/etc/raddb/acct_users"
preproxy_usersfile = "/usr/local/etc/raddb/preproxy_users"
compat = "no"
}
Module: Linked to module rlm_checkval
Module: Instantiating module "checkval" from file /usr/local/etc/raddb/modules/checkval
checkval {
item-name = "Calling-Station-Id"
check-name = "Calling-Station-Id"
data-type = "string"
notfound-reject = no
}
rlm_checkval: Registered name Calling-Station-Id for attribute 31
Module: Checking preacct {...} for more modules to load
Module: Linked to module rlm_acct_unique
Module: Instantiating module "acct_unique" from file /usr/local/etc/raddb/modules/acct_unique
acct_unique {
key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port"
}
Module: Checking accounting {...} for more modules to load
Module: Linked to module rlm_detail
Module: Instantiating module "detail" from file /usr/local/etc/raddb/modules/detail
detail {
detailfile = "/var/log/radacct/%{%{Packet-Src-IP-Address}:-%{Packet-Src-IPv6-Address}}/detail-%Y%m%d"
header = "%t"
detailperm = 384
dirperm = 493
locking = no
log_packet_header = no
}
Module: Instantiating module "datacounterdaily" from file /usr/local/etc/raddb/modules/datacounter_acct
exec datacounterdaily {
wait = yes
program = "/bin/sh /usr/local/etc/raddb/scripts/datacounter_acct.sh %{request:User-Name} daily %{request:Acct-Input-Octets} %{request:Acct-Output-Octets}"
input_pairs = "request"
shell_escape = yes
}
Module: Instantiating module "datacounterweekly" from file /usr/local/etc/raddb/modules/datacounter_acct
exec datacounterweekly {
wait = yes
program = "/bin/sh /usr/local/etc/raddb/scripts/datacounter_acct.sh %{request:User-Name} weekly %{request:Acct-Input-Octets} %{request:Acct-Output-Octets}"
input_pairs = "request"
shell_escape = yes
}
Module: Instantiating module "datacountermonthly" from file /usr/local/etc/raddb/modules/datacounter_acct
exec datacountermonthly {
wait = yes
program = "/bin/sh /usr/local/etc/raddb/scripts/datacounter_acct.sh %{request:User-Name} monthly %{request:Acct-Input-Octets} %{request:Acct-Output-Octets}"
input_pairs = "request"
shell_escape = yes
}
Module: Instantiating module "datacounterforever" from file /usr/local/etc/raddb/modules/datacounter_acct
exec datacounterforever {
wait = yes
program = "/bin/sh /usr/local/etc/raddb/scripts/datacounter_acct.sh %{request:User-Name} forever %{request:Acct-Input-Octets} %{request:Acct-Output-Octets}"
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_radutmp
Module: Instantiating module "radutmp" from file /usr/local/etc/raddb/modules/radutmp
radutmp {
filename = "/var/log/radutmp"
username = "%{User-Name}"
case_sensitive = yes
check_with_nas = yes
perm = 384
callerid = yes
}
Module: Linked to module rlm_attr_filter
Module: Instantiating module "attr_filter.accounting_response" from file /usr/local/etc/raddb/modules/attr_filter
attr_filter attr_filter.accounting_response {
attrsfile = "/usr/local/etc/raddb/attrs.accounting_response"
key = "%{User-Name}"
relaxed = no
}
Module: Checking session {...} for more modules to load
Module: Checking pre-proxy {...} for more modules to load
Module: Instantiating module "attr_filter.pre-proxy" from file /usr/local/etc/raddb/modules/attr_filter
attr_filter attr_filter.pre-proxy {
attrsfile = "/usr/local/etc/raddb/attrs.pre-proxy"
key = "%{Realm}"
relaxed = no
}
Module: Checking post-proxy {...} for more modules to load
Module: Instantiating module "attr_filter.post-proxy" from file /usr/local/etc/raddb/modules/attr_filter
attr_filter attr_filter.post-proxy {
attrsfile = "/usr/local/etc/raddb/attrs"
key = "%{Realm}"
relaxed = no
}
Module: Checking post-auth {...} for more modules to load
Module: Instantiating module "attr_filter.access_reject" from file /usr/local/etc/raddb/modules/attr_filter
attr_filter attr_filter.access_reject {
attrsfile = "/usr/local/etc/raddb/attrs.access_reject"
key = "%{User-Name}"
relaxed = no
}
} # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = 10.1.1.1
port = 1812
}
Listening on authentication address 10.1.1.1 port 1812
Listening on proxy address 10.1.1.1 port 1814

Nachtfalke

Hi,

on pfsense 1.2.3 there was a description how to do it with OpenVPN
http://doc.pfsense.org/index.php/Using_OpenVPN_With_FreeRADIUS

On pfsense 2.0.x this was improved and is much easier:
http://doc.pfsense.org/index.php/Using_OpenVPN_With_FreeRADIUS#Configuration_on_pfSense_2.x
Important would be these steps: pfSense configuration as NAS

So perhaps this will help you a little bit with SSH.

PS: To make sure that freeradius is listening on the correct interface chose a ***** as address which means all interfaces.

sdb1031

Thanks for your reply. After looking at the articles you suggested, I saw that I needed to create an /etc/radius.conf file and specify the appropriate values in the file. I have it working now. Thanks again!