• Create key: openssl genrsa -des3 -out vpn-cert2.key 1024
• Create CSR (make sure that the CN is a simple name, no spaces or special characters): openssl req -new -key vpn-cert2.key -out vpn-cert2.csr
• Request certificate with your CA
• Create a p12 file from the key and the certificate: openssl pkcs12 -export -inkey vpn-cert2.key -in certnew-3.cer -out vpn.p12
• Import the p12 file (containing the key and certificate) in the system keychain (not the login keychain, that doesn’t work): sudo security import vpn.p12 -k /Library/Keychains/System.keychain
• If needed you can import the CA in your keychain and trust the imported certificate: sudo security add-trusted-cert -k /Library/Keychains/System.keychain root.ca.pem
  Note:Make sure that if you import your own CA, that you do it this way. Otherwise the VPN server certificate will not be verified correctly.

To use the certificate for VPN authentication do the following:

• Open System Preferences
• Go to Network
• Click + to add network interface, Select Interface: VPN, VPN Type: Cisco IPSec
• Click Create
• In the Server Address type the hostname of the firewall. This is really important. The firewall has a certificate configured on the FQDN. Make sure the server address is the name of the certificate in the firewall. This FQDN can be found in the trustpoint configuration (see below)
• Enter the username
• Click Authentication Settings
• Select Certificate and Click Select
• Select the correct certificate that you just imported
• Click OK
• Click Apply

When you are not able to select the certificate you created the problem is that the CN is not supported. Make sure the CN that you used to create the CSR does not contain spaces or special characters.

Firewall trustpoint config:

crypto ca trustpoint CA1
enrollment terminal
fqdn fw.xxxx.com
subject-name CN=fw.xxxx.com,OU=IT,O=XXX Limited,C=NL,St=NH,L=Amsterdam


Step 1: Enable network access for libvirtd
First enable network access for libvirtd on the KVM server(s). On CentOS/RHEL this is done by uncommenting or adding the following line in /etc/sysconfig/libvirtd:

LIBVIRTD_ARGS="--listen"


Step 2: Install a CA on the management server
Install the Perl certificate tools:

yum install openssl-perl

Create Certificate authority:

cd /etc/pki/tls/misc/
./CA.pl -newca

Example output:

./CA.pl -newca
CA certificate filename (or enter to create)

Write out database with 1 new entries
Data Base Updated


Step 3: Create CSR’s

openssl genrsa -des3 -out kvm-server1.tmp
openssl rsa -in kvm-server1.tmp -out kvm-server1.key
openssl genrsa -des3 -out mgmt-host.tmp
openssl rsa -in mgmt-host.tmp -out mgmt-host.key
openssl req -new -key kvm-server1.key -out kvm-server1.csr
openssl req -new -key mgmt-host.key -out mgmt-host.csr


Step 4: Sign the certificates

openssl ca -config /etc/pki/tls/openssl.cnf -policy policy_anything -out /root/mgmt-host.crt -infiles /root/mgmt-host.csr
openssl ca -config /etc/pki/tls/openssl.cnf -policy policy_anything -out /root/kvm-server1.crt -infiles /root/kvm-server1.csr

Example output:

Using configuration from /etc/pki/tls/openssl.cnf
Enter pass phrase for /etc/pki/CA/private/cakey.pem:
Check that the request matches the signature
Signature ok
Certificate Details:
Serial Number:
d8:95:24:4b:4e:b1:13:9c
Validity
Not Before: Feb 25 23:31:40 2010 GMT
Not After : Feb 25 23:31:40 2011 GMT
Subject:
countryName = XX
stateOrProvinceName = XX
localityName = XX
organizationName = XX
organizationalUnitName = XX
commonName = mgmt-host.xxx.nl
emailAddress = xxxxx
X509v3 extensions:
X509v3 Basic Constraints:
CA:FALSE
Netscape Comment:
OpenSSL Generated Certificate
X509v3 Subject Key Identifier:
6C:EA:8B:C1:D6:XX:B6:6B:5B:18:02
X509v3 Authority Key Identifier:
keyid:C9:36:4A:XXXX:6F:FD:2E:86

Step 5: Copy over the certificates to the correct location
On the management host (mgmt-host):

mkdir /etc/pki/libvirt
mkdir /etc/pki/libvirt/private
mkdir /etc/pki/libvirt-vnc

cp /root/mgmt-host.key /etc/pki/libvirt/private/clientkey.pem
cp /root/mgmt-host.key /etc/pki/libvirt-vnc/clientkey.pem
cp /root/mgmt-host.crt /etc/pki/libvirt/clientcert.pem
cp /root/mgmt-host.crt /etc/pki/libvirt-vnc/clientcert.pem


Transfer the key and certificate files to the KVM server (kvm-server1). Ideally, you create the key and CSR on the host itself, so you only have to transfer the certificate. Then, copy the certificates and CA to the correct location on the KVM (libvirtd) server:


mkdir /etc/pki/libvirt
mkdir /etc/pki/libvirt/private
mkdir /etc/pki/libvirt-vnc

cp kvm-server1.crt /etc/pki//libvirt/servercert.pem
cp kvm-server1.crt /etc/pki/libvirt-vnc/server-cert.pem


Make sure the CA generated on the management server is available on the KVM server in the following file:
/etc/pki/CA/cacert.pem

Step 6: Reload libvirtd

/etc/init.d/libvirtd reload


Step 7: Test
With these certificates setup, you should be able to access libvirtd on kvm-server1 from mgmt-host. Use the following command to test:

virsh -c qemu://kvm-server1.xxxx.nl/system
Welcome to virsh, the virtualization interactive terminal.

virsh #

Use the list command to see a list of running guests on the server. This only works if these guests have also been created via libvirtd. Manually started KVM guests will not show up in this list.