Certificate-Based Validation Using EAP-MSCHAPv2 Authentication (CLI Procedure)
Overview
In this topic, you will see that the EAP-MSCHAPv2 authentication method uses the username and the password for authenticating the user using the RADIUS server. You use these credentials to download the initial configuration from the SRX Series Firewall and authenticate the user using the RADIUS server during remote access VPN setup at the IKE negotiation process.
We assume that you have completed the basic setup of your SRX Series Firewalls, including interfaces, zones, and security policies as illustrated in the Figure 1.
Figure 1: Topology
For information about prerequisites, see System Requirements.
Ensure that you have a Public Key Infrastructure (PKI) configured as the backend authentication. In this case, you only need to install the root certificate of the CA on each client. Note that local authentication is not supported in this scenario.
You must ensure that the SRX Series Firewall uses either a signed certificate or a self-signed certificate instead of the default system-generated certificate. Before you start configuring Juniper Secure Connect, you must bind the certificate to the SRX Series Firewall by executing the following command:
user@host# set system services web-management https pki-local-certificate <cert_name>
For example:
user@host# set system services web-management https pki-local-certificate SRX_Certificate
Where SRX_Certificate is the self-signed certificate.
CLI Quick Configuration
To quickly configure this example on your SRX Series Firewalls, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, and then copy and paste the commands into the CLI at the [edit] hierarchy level.
[edit] user@host# set security ike proposal JUNIPER_SECURE_CONNECT authentication-method rsa-signatures set security ike proposal JUNIPER_SECURE_CONNECT dh-group group19 set security ike proposal JUNIPER_SECURE_CONNECT encryption-algorithm aes-256-gcm set security ike proposal JUNIPER_SECURE_CONNECT lifetime-seconds 28800 set security ike policy JUNIPER_SECURE_CONNECT mode main set security ike policy JUNIPER_SECURE_CONNECT proposals JUNIPER_SECURE_CONNECT set security ike policy JUNIPER_SECURE_CONNECT certificate local-certificate SRX_Certificate set security ike gateway JUNIPER_SECURE_CONNECT dynamic hostname ra.example.com set security ike gateway JUNIPER_SECURE_CONNECT dynamic ike-user-type shared-ike-id set security ike gateway JUNIPER_SECURE_CONNECT ike-policy JUNIPER_SECURE_CONNECT set security ike gateway JUNIPER_SECURE_CONNECT dead-peer-detection optimized set security ike gateway JUNIPER_SECURE_CONNECT dead-peer-detection interval 10 set security ike gateway JUNIPER_SECURE_CONNECT dead-peer-detection threshold 5 set security ike gateway JUNIPER_SECURE_CONNECT version v2-only set security ike gateway JUNIPER_SECURE_CONNECT aaa access-profile Juniper_Secure_Connect set security ike gateway JUNIPER_SECURE_CONNECT tcp-encap-profile SSL-VPN set security ike gateway JUNIPER_SECURE_CONNECT external-interface ge-0/0/0 set security ike gateway JUNIPER_SECURE_CONNECT local-address 192.0.2.0 set security ipsec proposal JUNIPER_SECURE_CONNECT encryption-algorithm aes-256-gcm set security ipsec proposal JUNIPER_SECURE_CONNECT lifetime-seconds 3600 set security ipsec policy JUNIPER_SECURE_CONNECT perfect-forward-secrecy keys group19 set security ipsec policy JUNIPER_SECURE_CONNECT proposals JUNIPER_SECURE_CONNECT set security ipsec vpn JUNIPER_SECURE_CONNECT bind-interface st0.0 set security ipsec vpn JUNIPER_SECURE_CONNECT ike gateway JUNIPER_SECURE_CONNECT set security ipsec vpn JUNIPER_SECURE_CONNECT ike ipsec-policy JUNIPER_SECURE_CONNECT set security ipsec vpn JUNIPER_SECURE_CONNECT traffic-selector ts-1 local-ip 0.0.0.0/0 set security ipsec vpn JUNIPER_SECURE_CONNECT traffic-selector ts-1 remote-ip 0.0.0.0/0 set security remote-access profile ra.example.com ipsec-vpn JUNIPER_SECURE_CONNECT set security remote-access profile ra.example.com access-profile Juniper_Secure_Connect set security remote-access profile ra.example.com client-config JUNIPER_SECURE_CONNECT set security remote-access client-config JUNIPER_SECURE_CONNECT connection-mode manual set security remote-access client-config JUNIPER_SECURE_CONNECT dead-peer-detection interval 60 set security remote-access client-config JUNIPER_SECURE_CONNECT dead-peer-detection threshold 5 set security remote-access client-config JUNIPER_SECURE_CONNECT no-eap-tls set security remote-access client-config JUNIPER_SECURE_CONNECT certificate warn-before-expiry 60 set access address-assignment pool Juniper_Secure_Connect_Addr-Pool family inet network 192.168.2.0/24 set access address-assignment pool Juniper_Secure_Connect_Addr-Pool family inet range Range low 192.168.2.11 set access address-assignment pool Juniper_Secure_Connect_Addr-Pool family inet range Range high 192.168.2.100 set access address-assignment pool Juniper_Secure_Connect_Addr-Pool family inet xauth-attributes primary-dns 10.8.8.8/32 set access address-assignment pool Juniper_Secure_Connect_Addr-Pool family inet xauth-attributes primary-wins 192.168.4.10/32 set access profile Juniper_Secure_Connect authentication-order radius set access profile Juniper_Secure_Connect address-assignment pool Juniper_Secure_Connect_Addr-Pool set access profile Juniper_Secure_Connect radius-server 192.168.3.10 port 1812 set access profile Juniper_Secure_Connect radius-server 192.168.3.10 secret "$9$ggaGjmfzCtOHqtO1RlegoJ" set access profile Juniper_Secure_Connect radius-server 192.168.3.10 timeout 5 set access profile Juniper_Secure_Connect radius-server 192.168.3.10 retry 3 set access firewall-authentication web-authentication default-profile Juniper_Secure_Connect set security pki ca-profile jweb-CA ca-identity jweb-CA set security pki ca-profile jweb-CA enrollment url http://juniper-ca.example.com/certsrv/ set security pki ca-profile jweb-CA enrollment retry 0 set security pki ca-profile jweb-CA enrollment retry-interval 0 set security pki ca-profile jweb-CA revocation-check disable set services ssl termination profile Juniper_SCC-SSL-Term-Profile server-certificate JUNIPER_SECURE_CONNECT(RSA) set security tcp-encap profile SSL-VPN ssl-profile Juniper_SCC-SSL-Term-Profile set security policies from-zone trust to-zone VPN policy JUNIPER_SECURE_CONNECT-1 match source-address any set security policies from-zone trust to-zone VPN policy JUNIPER_SECURE_CONNECT-1 match destination-address any set security policies from-zone trust to-zone VPN policy JUNIPER_SECURE_CONNECT-1 match application any set security policies from-zone trust to-zone VPN policy JUNIPER_SECURE_CONNECT-1 then permit set security policies from-zone trust to-zone VPN policy JUNIPER_SECURE_CONNECT-1 then log session-close set security policies from-zone VPN to-zone trust policy JUNIPER_SECURE_CONNECT-2 match source-address any set security policies from-zone VPN to-zone trust policy JUNIPER_SECURE_CONNECT-2 match destination-address any set security policies from-zone VPN to-zone trust policy JUNIPER_SECURE_CONNECT-2 match application any set security policies from-zone VPN to-zone trust policy JUNIPER_SECURE_CONNECT-2 then permit set security policies from-zone VPN to-zone trust policy JUNIPER_SECURE_CONNECT-2 then log session-close set interfaces ge-0/0/0 unit 0 family inet address 192.0.2.0/24 set interfaces ge-0/0/1 unit 0 family inet address 198.51.100.0/24 set interfaces st0 unit 0 family inet set security zones security-zone trust host-inbound-traffic system-services all set security zones security-zone trust host-inbound-traffic protocols all set security zones security-zone trust interfaces ge-0/0/0.0 set security zones security-zone vpn host-inbound-traffic system-services all set security zones security-zone vpn host-inbound-traffic protocols all set security zones security-zone VPN interface st0.0 set security zones security-zone vpn interfaces ge-0/0/1.0
Step-by-Step-Procedure
To configure VPN settings using the command line interface:
Result
From operational mode, confirm your configuration by
entering the show security, show access, and show
security pki commands. If the output does not display the intended configuration,
repeat the configuration instructions in this example to correct it.
[edit]
user@host> show security
ike {
proposal JUNIPER_SECURE_CONNECT {
authentication-method rsa-signatures;
dh-group group19; encryption-algorithm aes-256-gcm;
lifetime-seconds 28800;
}
policy JUNIPER_SECURE_CONNECT {
mode main;
proposals JUNIPER_SECURE_CONNECT;
certificate {
local-certificate SRX_Certificate;
}
}
gateway JUNIPER_SECURE_CONNECT {
ike-policy JUNIPER_SECURE_CONNECT;
dynamic {
hostname ra.example.com;
ike-user-type shared-ike-id;
}
dead-peer-detection {
optimized;
interval 10;
threshold 5;
}
external-interface ge-0/0/1;
aaa {
access-profile Juniper_Secure_Connect;
}
version v2-only;
tcp-encap-profile SSL-VPN;
}
}
ipsec {
proposal JUNIPER_SECURE_CONNECT {
encryption-algorithm aes-256-gcm;
lifetime-seconds 3600;
}
policy JUNIPER_SECURE_CONNECT {
perfect-forward-secrecy {
keys group19;
}
proposals JUNIPER_SECURE_CONNECT;
}
vpn JUNIPER_SECURE_CONNECT {
bind-interface st0.0;
ike {
gateway JUNIPER_SECURE_CONNECT;
ipsec-policy JUNIPER_SECURE_CONNECT;
}
traffic-selector ts-1 {
local-ip 0.0.0.0/0;
remote-ip 0.0.0.0/0;
}
}
}
remote-access {
profile ra.example.com {
ipsec-vpn JUNIPER_SECURE_CONNECT;
access-profile Juniper_Secure_Connect;
client-config JUNIPER_SECURE_CONNECT;
}
client-config JUNIPER_SECURE_CONNECT {
connection-mode manual;
dead-peer-detection {
interval 60;
threshold 5;
}
no-eap-tls;
certificate {
warn-before-expiry 60;
}
}
}
policies {
from-zone trust to-zone VPN {
policy JUNIPER_SECURE_CONNECT-1 {
match {
source-address any;
destination-address any;
application any;
}
then {
permit;
log {
session-close;
}
}
}
}
from-zone VPN to-zone trust {
policy JUNIPER_SECURE_CONNECT-2 {
match {
source-address any;
destination-address any;
application any;
}
then {
permit;
log {
session-close;
}
}
}
}
}
[edit]
user@host> show access
access {
profile Juniper_Secure_Connect {
authentication-order radius;
address-assignment {
pool Juniper_Secure_Connect_Addr-Pool;
}
radius-server {
192.168.3.10 {
port 1812;
secret "$9$ggaGjmfzCtOHqtO1RlegoJ"; ## SECRET-DATA
timeout 5;
retry 3;
}
}
}
address-assignment {
pool Juniper_Secure_Connect_Addr-Pool {
family inet {
network 192.168.2.0/24;
range Range {
low 192.168.2.11;
high 192.168.2.100;
}
xauth-attributes {
primary-dns 10.8.8.8/32;
primary-wins 192.168.4.10/32;
}
}
}
}
firewall-authentication {
web-authentication {
default-profile Juniper_Secure_Connect;
}
}
}
[edit]
user@host> show security pki
pki {
ca-profile jweb-CA {
ca-identity jweb-CA;
enrollment {
url http://juniper-ca.example.com/certsrv/;
retry 0;
retry-interval 0;
}
revocation-check {
disable;
}
}
}
[edit]
user@host> show interfaces
ge-0/0/0 {
unit 0 {
family inet {
address 192.0.2.0/24;
}
}
}
ge-0/0/1 {
unit 0 {
family inet {
address 198.51.100.0/24;
}
}
}
st0 {
unit 1 {
family inet;
}
}
[edit]
user@host> show security zones
security-zone trust {
host-inbound-traffic {
system-services {
all;
}
protocols {
all;
}
}
interfaces {
ge-0/0/0.0;
}
}
security-zone vpn {
host-inbound-traffic {
system-services {
all;
}
protocols {
all;
}
}
interfaces {
st0.1;
ge-0/0/1.0;
}
}
When you are done configuring the feature on your device, enter commit from configuration mode.