Authentication IPsec VPN Client using the digital certificate
Hello
Please I need some clarification and help to set up my ASA 5540 with IOS 8.3 x for client certificate authentication remote.
I have my certificate root from the Microsoft CA, but not quite sure if the steps described in the following cisco Web sites are exactly what I need since the firewall seems to generate the certificate to use.
http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a0080930f21.shtml
http://www.Cisco.com/en/us/products/ps6120/products_configuration_example09186a008073b12b.shtml
My setup is such that the CA will issue certificates to remote clients and the ASA firewall, and remote clients will authenticate and connect with their certificates which the firewall is constantly updating using the Revocation list updated by the certification authority.
The dhcp pool must be issued by the DC inside network and not on the firewall.
Are there any examples or best practices to achieve steps will be really appreciated.
Thank you
Hi Josh,.
Let me explain briefly how Auth PKI:
In a public key infrastructure configuration, devices trust not each other directly, but they have a certification authority, which is the one who issues the certificate. We call this root CA (there may be a more complex configuration WHERE intermediate are involved, but that's another story). So when the root CA issues a certificate, he signs it with its private key. To be able to verify this signature, we should have the CA public key, which is included with the certification authority.
So for certificate authentication, you must create a trustpoint, that defines the parameters of the root certification authority.
Then you will authenticate this trustpoint, which basically means that you will get the certificate of the root CA and store locally.
After that, you sign up to this CA, which means that you will ask for (and get) your own certificate.
Other users will do the same and have the same root CA Cert, but different personal (identity) certificates.
So what happens on authentication is that both ends send their certificate to the other, and they will use the public key contained in the root CA to validate the signature of the certificate received from the remote peer. If the signature is correct, this means that the certificate authority root actually issued the certificate, and this remote peer can be trusted (or not)
Hope this is clear.
Tags: Cisco Security
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Hello
I set up a lab for RA VPN with a version of the ASA5510 8.2 and VPN Client 5 software using digital certificates with Microsoft CA on a Windows 2003 server. I did the configuration based on this document from Cisco's Web site:
Now, the vpn works fine, but now I need to configure a tunnel-different groups so I can provide different services to different users. The problem I have now is that I don't know how to set it up for the certificate is the name of tunnel-group. If I do an ASA debug crypto isakmp I get this error message:
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% ASA-713906 7: IP = 165.98.139.12, trying to find the group using default group...
% ASA-713906 7: IP = 165.98.139.12, connection landed on tunnel_group DefaultRAGroupSo, basically, when using certificates I connect always VPN RA only with the group default DefaultRAGroup. Do I have to use a model of different web registration for application for a certificate instead of the user model? How can I determine the OU on the user certificate so that match tunnel-group?
Please help me!
Kind regards
Fernando Aguirre
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This is the configuration for your reference guide:
http://www.Cisco.com/en/us/partner/docs/security/ASA/asa82/configuration/guide/IKE.html#wp1053978
And here is the command for "map of crypto ca certificate": reference
http://www.Cisco.com/en/us/docs/security/ASA/asa80/command/reference/C5.html#wp2186685
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Here is my latest config running.
Thank you for taking the time to read this.
passwd encrypted W/KqlBn3sSTvaD0T
no names
name 192.168.1.117 kylewooddesk kyle description
!
interface Vlan1
nameif inside
security-level 100
IP 192.168.1.1 255.255.255.0
!
interface Vlan2
nameif outside
security-level 0
IP address dhcp setroute
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interface Ethernet0/0
switchport access vlan 2
!
interface Ethernet0/1
!
interface Ethernet0/2
!
interface Ethernet0/3
!
interface Ethernet0/4
!
interface Ethernet0/5
!
interface Ethernet0/6
!
interface Ethernet0/7
!
boot system Disk0: / asa822 - k8.bin
passive FTP mode
DNS lookup field inside
DNS domain-lookup outside
DNS server-group DefaultDNS
domain wood.local
permit same-security-traffic intra-interface
object-group service rdp tcp
access rdp Description
EQ port 3389 object
outside_access_in list extended access permit tcp any interface outside eq 3389
outside_access_in list extended access permit tcp any interface outside eq 8080
outside_access_in list extended access permit tcp any interface outside eq 3334
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woodgroup_splitTunnelAcl list standard access allowed host 192.168.1.117
inside_nat0_outbound to access ip 192.168.1.0 scope list allow 255.255.255.0 192.168.5.0 255.255.255.240
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woodgroup_splitTunnelAcl_1 list standard access allowed 192.168.1.0 255.255.255.0
inside_nat0_outbound_1 to access ip 192.168.1.0 scope list allow 255.255.255.0 192.168.5.0 255.255.255.240
inside_nat0_outbound_1 to access extended list ip 192.168.5.0 allow 255.255.255.240 all
inside_test list extended access permit icmp any host 192.168.1.117
no pager
Enable logging
timestamp of the record
asdm of logging of information
Debugging trace record
Within 1500 MTU
Outside 1500 MTU
mask pool local Kyle 192.168.5.1 - 192.168.5.10 IP 255.255.255.0
IP local pool vpnpool 192.168.1.220 - 192.168.1.230
ICMP unreachable rate-limit 1 burst-size 1
ASDM image disk0: / asdm - 631.bin
don't allow no asdm history
ARP timeout 14400
Global (inside) 1 interface
Global 1 interface (outside)
NAT (inside) 0-list of access inside_nat0_outbound_1
NAT (inside) 1 0.0.0.0 0.0.0.0
public static interface 3389 (indoor, outdoor) 192.168.1.117 tcp 3389 netmask 255.255.255.255 dns
public static tcp (indoor, outdoor) interface 8080 192.168.1.117 8080 netmask 255.255.255.255
public static tcp (indoor, outdoor) interface 3334 192.168.1.86 3334 netmask 255.255.255.255
static (inside, upside down) 75.65.238.40 192.168.1.117 netmask 255.255.255.255
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Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
Sunrpc timeout 0:10:00 h323 0:05:00 h225 mgcp from 01:00 0:05:00 mgcp-pat 0:05:00
Sip timeout 0:30:00 sip_media 0:02:00 prompt Protocol sip-0: 03:00 sip - disconnect 0:02:00
Timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-registration DfltAccessPolicy
WebVPN
the files enable exploration
activate the entry in the file
enable http proxy
Enable URL-entry
SVC request no svc default
AAA authentication http LOCAL console
Enable http server
http 192.168.1.0 255.255.255.0 inside
No snmp server location
No snmp Server contact
Server enable SNMP traps snmp authentication linkup, linkdown cold start
Crypto ipsec transform-set esp-SHA-ESP-3DES-3des esp-sha-hmac
Crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac
Crypto ipsec transform-set ESP-DES-SHA esp - esp-sha-hmac
Crypto ipsec transform-set ESP-DES-MD5 esp - esp-md5-hmac
Crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac
Crypto ipsec transform-set ESP-3DES-MD5-esp-3des esp-md5-hmac
Crypto ipsec transform-set ESP-AES-256-SHA 256 - aes - esp esp-sha-hmac
Crypto ipsec transform-set ESP-AES-128-SHA aes - esp esp-sha-hmac
Crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac
Crypto ipsec transform-set ESP-AES-128-MD5-esp - aes esp-md5-hmac
life crypto ipsec security association seconds 28800
Crypto ipsec kilobytes of life - safety 4608000 association
crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 pfs Group1 set
Crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 value transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA MD5-ESP-3DES ESP-DES-SHA ESP-DES-MD5
outside_map card crypto 65535-isakmp dynamic ipsec SYSTEM_DEFAULT_CRYPTO_MAP
outside_map interface card crypto outside
crypto isakmp identity address
crypto ISAKMP allow outside
crypto ISAKMP policy 10
preshared authentication
3des encryption
sha hash
Group 2
life 86400
Telnet 192.168.1.0 255.255.255.0 inside
Telnet timeout 5
SSH timeout 5
Console timeout 0
dhcpd dns 8.8.8.8 8.8.4.4
dhcpd lease 3000
!
dhcpd address 192.168.1.100 - 192.168.1.130 inside
dhcpd allow inside
!
a basic threat threat detection
host of statistical threat detection
Statistics-list of access threat detection
no statistical threat detection tcp-interception
WebVPN
allow outside
SVC disk0:/anyconnect-win-2.4.1012-k9.pkg 1 image
enable SVC
internal sslwood group policy
attributes of the strategy of group sslwood
VPN-tunnel-Protocol svc webvpn
WebVPN
list of URLS no
internal group woodgroup strategy
woodgroup group policy attributes
value of server DNS 8.8.8.8 8.8.4.4
Protocol-tunnel-VPN IPSec
Split-tunnel-policy tunnelspecified
value of Split-tunnel-network-list woodgroup_splitTunnelAcl_1
mrkylewood encrypted Q4339wmn1ourxj9X privilege 15 password username
username mrkylewood attributes
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VPN - connections 3
VPN-tunnel-Protocol svc webvpn
value of group-lock sslwood
WebVPN
SVC request no webvpn default
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tunnel-group woodgroup General attributes
address pool Kyle
Group Policy - by default-woodgroup
tunnel-group woodgroup ipsec-attributes
pre-shared key *.
type tunnel-group sslwood remote access
tunnel-group sslwood General-attributes
address pool Kyle
authentication-server-group (inside) LOCAL
authentication-server-group (outside LOCAL)
Group Policy - by default-sslwood
!
class-map inspection_default
match default-inspection-traffic
!
!
type of policy-card inspect dns preset_dns_map
parameters
message-length maximum 512
Policy-map global_policy
class inspection_default
inspect the preset_dns_map dns
inspect the ftp
inspect h323 h225
inspect the h323 ras
inspect the netbios
inspect the rsh
inspect the rtsp
inspect the skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect the tftp
inspect the sip
inspect xdmcp
Review the ip options
type of policy-card inspect dns MY_DNS_INSPECT_MAP
parameters
!
global service-policy global_policy
context of prompt hostname
call-home
Profile of CiscoTAC-1
no active account
http https://tools.cisco.com/its/service/oddce/services/DDCEService destination address
email address of destination [email protected] / * /
http https://tools.cisco.com/its/service/...es/DDCEService destination address
destination-mode http transport
Subscribe to alert-group diagnosis
Subscribe to alert-group environment
Subscribe to alert-group monthly periodic inventory
monthly periodicals to subscribe to alert-group configuration
daily periodic subscribe to alert-group telemetry
Cryptochecksum:6fa8db79bcf695080cbdc1159b409360
: end
asawood (config) #.
You also need to add the following:
WebVPN
tunnel-group-list activate
output
tunnel-group sslwood webvpn-attributes
activation of the Group sslwood alias
Let us know if it works.
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Sent by Cisco Support technique iPhone App
try to including this traffic in the States of sheep you have
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Post edited by: Mark Nettleton
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