Add SSL Certificate to OPENVPN Access Server
To configure SSL we need to have three files, in case of using Let’s Encrypt we will use the next files to create them:
*.crt– it’s ourfullchain.pemfile*.key–privkey.pemfile*.bundle– will be created fromfullchain.pemandprivkey.pem
Check Let’s Encrypt existing files:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# ls -l
total 4
lrwxrwxrwx 1 root root 42 Feb 22 10:56 cert.pem -\> ../../archive/vpn.example.com/cert1.pem
lrwxrwxrwx 1 root root 43 Feb 22 10:56 chain.pem -\> ../../archive/vpn.example.com/chain1.pem
lrwxrwxrwx 1 root root 47 Feb 22 10:56 fullchain.pem -\> ../../archive/vpn.example.com/fullchain1.pem
lrwxrwxrwx 1 root root 45 Feb 22 10:56 privkey.pem -\> ../../archive/vpn.example.com/privkey1.pem
Install the private key to OpenVPN server:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# /usr/local/openvpn_as/scripts/sacli --key "cs.priv_key" --value_file "privkey.pem" ConfigPut
[True, {}]
Install its public cert:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# /usr/local/openvpn_as/scripts/sacli --key "cs.cert" --value_file "fullchain.pem" ConfigPut
[True, {}]
“Generate” the bundle file – just by using cat for the fullchain.pem and privkey.pem:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# cat fullchain.pem privkey.pem > bundle.pem
Add it to the OpenVPN AS:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# /usr/local/openvpn_as/scripts/sacli --key "cs.ca_bundle" --value_file "bundle.pem" ConfigPut
[True, {}]
Restart the service:
root@openvpnas2:/etc/letsencrypt/live/vpn.example.com# /usr/local/openvpn_as/scripts/sacli start
RunStart warm None
{
"errors": {},
"service\_status": {
"api": "on",
"auth": "on",
"bridge": "on",
"client\_query": "restarted",
"crl": "on",
"daemon\_pre": "on",
"db\_push": "on",
"ip6tables\_live": "on",
"ip6tables\_openvpn": "on",
"iptables\_live": "on",
"iptables\_openvpn": "on",
"iptables\_web": "restarted",
"license": "on",
"log": "on",
"openvpn\_0": "on",
"openvpn\_1": "on",
"user": "on",
"web": "restarted"
}
}
WILL_RESTART ['web', 'client']
Check the UI now:
OpenVPN AS hostname
And the last step here will be to configure server’s hostname if this wasn’t made during initial setup.
Go to the Admin UI => Network Settings:
Done.