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ovpn: Add support for revoking certificates (CRL)

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* Add this much needed missing feature.  Easy RSA makes it... easy.
This commit is contained in:
Kyle Manna 2015-05-11 10:33:56 -07:00
parent bcb55f6255
commit 5021bad597
2 changed files with 14 additions and 0 deletions
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5
bin/ovpn_genconfig
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@ -160,6 +160,7 @@ ca $EASYRSA_PKI/ca.crt
cert $EASYRSA_PKI/issued/${OVPN_CN}.crt
dh $EASYRSA_PKI/dh.pem
tls-auth $EASYRSA_PKI/ta.key
crl-verify $EASYRSA_PKI/crl.pem
key-direction 0
keepalive 10 60
persist-key
@ -177,6 +178,10 @@ user nobody
group nogroup
EOF
# Create an empty CRL
[ ! -f "$EASYRSA_PKI/crl.pem" ] && touch $EASYRSA_PKI/crl.pem
[ -n "$OVPN_CLIENT_TO_CLIENT" ] && echo "client-to-client" >> "$conf"
[ "$OVPN_DNS" == "1" ] && echo push "dhcp-option DNS 8.8.4.4" >> "$conf"
[ "$OVPN_DNS" == "1" ] && echo push "dhcp-option DNS 8.8.8.8" >> "$conf"

9
docs/clients.md
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@ -26,3 +26,12 @@ After doing so, you will find the following files in each of the `$cn` directori
$cn.crt
$cn.key
ta.key
## Revoking Client Certificates
Revoke `client1`'s certificate and generate the certificate revocation list (CRL):
docker run --rm -it -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn easyrsa revoke client1
docker run --rm -it -v /tmp/openvpn:/etc/openvpn kylemanna/openvpn easyrsa gen-crl
The OpenVPN server will read this change everytime a client connects (no need to restart server) and deny clients access using revoked certificates.