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Diffstat (limited to 'docs/configuration/interfaces/openvpn.rst')
| -rw-r--r-- | docs/configuration/interfaces/openvpn.rst | 179 |
1 files changed, 77 insertions, 102 deletions
diff --git a/docs/configuration/interfaces/openvpn.rst b/docs/configuration/interfaces/openvpn.rst index 02c5a797..6bfc0b9d 100644 --- a/docs/configuration/interfaces/openvpn.rst +++ b/docs/configuration/interfaces/openvpn.rst @@ -48,12 +48,11 @@ Site-to-site mode supports x.509 but doesn't require it and can also work with static keys, which is simpler in many cases. In this example, we'll configure a simple site-to-site OpenVPN tunnel using a 2048-bit pre-shared key. -First, one of the systems generate the key using the operational command -``generate openvpn key <filename>``. This will generate a key with the name -provided in the ``/config/auth/`` directory. Once generated, you will need to -copy this key to the remote router. +First, one of the systems generate the key using the :ref:`generate pki openvpn shared-secret<configuration/pki:pki>` +command. Once generated, you will need to install this key on the local system, +then copy and install this key to the remote router. -In our example, we used the filename ``openvpn-1.key`` which we will reference +In our example, we used the key name ``openvpn-1`` which we will reference in our configuration. * The public IP address of the local side of the VPN will be 198.51.100.10. @@ -79,13 +78,18 @@ Local Configuration: .. code-block:: none + run generate pki openvpn shared-secret install openvpn-1 + Configure mode commands to install OpenVPN key: + set pki openvpn shared-secret openvpn-1 key 'generated_key_string' + set pki openvpn shared-secret openvpn-1 version '1' + set interfaces openvpn vtun1 mode site-to-site set interfaces openvpn vtun1 protocol udp set interfaces openvpn vtun1 persistent-tunnel set interfaces openvpn vtun1 remote-host '203.0.113.11 set interfaces openvpn vtun1 local-port '1195' set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 shared-secret-key openvpn-1 set interfaces openvpn vtun1 local-address '10.255.1.1' set interfaces openvpn vtun1 remote-address '10.255.1.2' @@ -93,13 +97,22 @@ Local Configuration - Annotated: .. code-block:: none + run generate pki openvpn shared-secret install openvpn-1 # Locally genearated OpenVPN shared secret. + The generated secret is the output to + the console. + Configure mode commands to install OpenVPN key: + set pki openvpn shared-secret openvpn-1 key 'generated_key_string' # Generated secret displayed in the output to + the console. + set pki openvpn shared-secret openvpn-1 version '1' # Generated secret displayed in the output to + the console. + set interfaces openvpn vtun1 mode site-to-site set interfaces openvpn vtun1 protocol udp set interfaces openvpn vtun1 persistent-tunnel set interfaces openvpn vtun1 remote-host '203.0.113.11' # Pub IP of other site set interfaces openvpn vtun1 local-port '1195' set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 shared-secret-key openvpn-1 # Locally generated secret name set interfaces openvpn vtun1 local-address '10.255.1.1' # Local IP of vtun interface set interfaces openvpn vtun1 remote-address '10.255.1.2' # Remote IP of vtun interface @@ -108,13 +121,16 @@ Remote Configuration: .. code-block:: none + set pki openvpn shared-secret openvpn-1 key 'generated_key_string' + set pki openvpn shared-secret openvpn-1 version '1' + set interfaces openvpn vtun1 mode site-to-site set interfaces openvpn vtun1 protocol udp set interfaces openvpn vtun1 persistent-tunnel set interfaces openvpn vtun1 remote-host '198.51.100.10' set interfaces openvpn vtun1 local-port '1195' set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 shared-secret-key openvpn-1 set interfaces openvpn vtun1 local-address '10.255.1.2' set interfaces openvpn vtun1 remote-address '10.255.1.1' @@ -122,13 +138,17 @@ Remote Configuration - Annotated: .. code-block:: none + set pki openvpn shared-secret openvpn-1 key 'generated_key_string' # Locally genearated OpenVPN shared secret + (from the Local Configuration Block). + set pki openvpn shared-secret openvpn-1 version '1' + set interfaces openvpn vtun1 mode site-to-site set interfaces openvpn vtun1 protocol udp set interfaces openvpn vtun1 persistent-tunnel set interfaces openvpn vtun1 remote-host '198.51.100.10' # Pub IP of other site set interfaces openvpn vtun1 local-port '1195' set interfaces openvpn vtun1 remote-port '1195' - set interfaces openvpn vtun1 shared-secret-key-file '/config/auth/openvpn-1.key' + set interfaces openvpn vtun1 shared-secret-key openvpn-1 # Locally generated secret name set interfaces openvpn vtun1 local-address '10.255.1.2' # Local IP of vtun interface set interfaces openvpn vtun1 remote-address '10.255.1.1' # Remote IP of vtun interface @@ -253,8 +273,8 @@ Server ****** Multi-client server is the most popular OpenVPN mode on routers. It always uses -x.509 authentication and therefore requires a PKI setup. Refer this section -**Generate X.509 Certificate and Keys** to generate a CA certificate, +x.509 authentication and therefore requires a PKI setup. Refer this topic +:ref:`configuration/pki:pki` to generate a CA certificate, a server certificate and key, a certificate revocation list, a Diffie-Hellman key exchange parameters file. You do not need client certificates and keys for the server setup. @@ -284,16 +304,30 @@ closing on connection resets or daemon reloads. set interfaces openvpn vtun10 persistent-tunnel set interfaces openvpn vtun10 protocol udp -Then we need to specify the location of the cryptographic materials. Suppose -you keep the files in `/config/auth/openvpn` +Then we need to generate, add and specify the names of the cryptographic materials. .. code-block:: none - set interfaces openvpn vtun10 tls ca-cert-file /config/auth/openvpn/ca.crt - set interfaces openvpn vtun10 tls cert-file /config/auth/openvpn/server.crt - set interfaces openvpn vtun10 tls key-file /config/auth/openvpn/server.key - set interfaces openvpn vtun10 tls crl-file /config/auth/openvpn/crl.pem - set interfaces openvpn vtun10 tls dh-file /config/auth/openvpn/dh2048.pem + run generate pki ca install ca-1 # Follow the instructions to generate CA cert. + Configure mode commands to install: + set pki ca ca-1 certificate 'generated_cert_string' + set pki ca ca-1 private key 'generated_private_key' + + run generate pki certificate sign ca-1 install srv-1 # Follow the instructions to generate server cert. + Configure mode commands to install: + set pki certificate srv-1 certificate 'generated_server_cert' + set pki certificate srv-1 private key 'generated_private_key' + + run generate pki dh install dh-1 # Follow the instructions to generate set of + Diffie-Hellman parameters. + Generating parameters... + Configure mode commands to install DH parameters: + set pki dh dh-1 parameters 'generated_dh_params_set' + + set interfaces openvpn vtun10 tls ca-certificate ca-1 + set interfaces openvpn vtun10 tls certificate srv-1 + set interfaces openvpn vtun10 tls crypt-key srv-1 + set interfaces openvpn vtun10 tls dh-params dh-1 Now we need to specify the server network settings. In all cases we need to specify the subnet for client tunnel endpoints. Since we want clients to access @@ -325,89 +359,30 @@ internally, so we need to create a route to the 10.23.0.0/20 network ourselves: set protocols static route 10.23.0.0/20 interface vtun10 -Generate X.509 Certificate and Keys -=================================== - -OpenVPN ships with a set of scripts called Easy-RSA that can generate the -appropriate files needed for an OpenVPN setup using X.509 certificates. -Easy-RSA comes installed by default on VyOS routers. - -Copy the Easy-RSA scripts to a new directory to modify the values. - -.. code-block:: none - - cp -r /usr/share/easy-rsa/ /config/my-easy-rsa-config - cd /config/my-easy-rsa-config - -To ensure the consistent use of values when generating the PKI, set default -values to be used by the PKI generating scripts. Rename the vars.example -filename to vars - -.. code-block:: none - - mv vars.example vars - -Following is the instance of the file after editing. You may also change other -values in the file at your discretion/need, though for most cases the defaults -should be just fine. (do not leave any of these parameters blank) - -.. code-block:: none - - set_var EASYRSA_DN "org" - set_var EASYRSA_REQ_COUNTRY "US" - set_var EASYRSA_REQ_PROVINCE "California" - set_var EASYRSA_REQ_CITY "San Francisco" - set_var EASYRSA_REQ_ORG "Copyleft Certificate Co" - set_var EASYRSA_REQ_EMAIL "me@example.net" - set_var EASYRSA_REQ_OU "My Organizational Unit" - set_var EASYRSA_KEY_SIZE 2048 - - -init-pki option will create a new pki directory or will delete any previously -generated certificates stored in that folder. The term 'central' is used to -refer server and 'branch' for client - -.. note:: Remember the “CA Key Passphrase” prompted in build-ca command, - as it will be asked in signing the server/client certificate. - -.. code-block:: none +Additionally, each client needs a copy of ca cert and its own client key and +cert files. The files are plaintext so they may be copied either manually from the CLI. +Client key and cert files should be signed with the proper ca cert and generated on the +server side. - vyos@vyos:/config/my-easy-rsa-config$./easyrsa init-pki - vyos@vyos:/config/my-easy-rsa-config$./easyrsa build-ca - vyos@vyos:/config/my-easy-rsa-config$./easyrsa gen-req central nopass - vyos@vyos:/config/my-easy-rsa-config$./easyrsa sign-req server central - vyos@vyos:/config/my-easy-rsa-config$./easyrsa gen-dh - vyos@vyos:/config/my-easy-rsa-config$./easyrsa build-client-full branch1 nopass - -To generate a certificate revocation list for any client, execute these -commands: +HQ's router requires the following steps to generate crypto materials for the Branch 1: .. code-block:: none - - vyos@vyos:/config/my-easy-rsa-config$./easyrsa revoke client1 - vyos@vyos:/config/my-easy-rsa-config$ ./easyrsa gen-crl - -Copy the files to /config/auth/openvpn/ to use in OpenVPN tunnel creation - -.. code-block:: none - - vyos@vyos:/config/my-easy-rsa-config$ sudo mkdir /config/auth/openvpn - vyos@vyos:/config/my-easy-rsa-config$ sudo cp pki/ca.crt /config/auth/openvpn - vyos@vyos:/config/my-easy-rsa-config$ sudo cp pki/dh.pem /config/auth/openvpn - vyos@vyos:/config/my-easy-rsa-config$ sudo cp pki/private/central.key /config/auth/openvpn - vyos@vyos:/config/my-easy-rsa-config$ sudo cp pki/issued/central.crt /config/auth/openvpn - vyos@vyos:/config/my-easy-rsa-config$ sudo cp pki/crl.pem /config/auth/openvpn - -Additionally, each client needs a copy of ca.crt and its own client key and -cert files. The files are plaintext so they may be copied either manually, -or through a remote file transfer tool like scp. Whichever method you use, -the files need to end up in the proper location on each router. -For example, Branch 1's router might have the following files: + + run generate pki certificate sign ca-1 install branch-1 # Follow the instructions to generate client + cert for Branch 1 + Configure mode commands to install: + +Branch 1's router might have the following lines: .. code-block:: none - vyos@branch1-rtr:$ ls /config/auth/openvpn - ca.crt branch1.crt branch1.key + set pki ca ca-1 certificate 'generated_cert_string' # CA cert generated on HQ router + set pki certificate branch-1 certificate 'generated_branch_cert' # Client cert generated and signed on HQ router + set pki certificate branch-1 private key 'generated_private_key' # Client cert key generated on HQ router + + set interfaces openvpn vtun10 tls ca-cert ca-1 + set interfaces openvpn vtun10 tls certificate branch-1 + set interfaces openvpn vtun10 tls crypt-key branch-1 Client Authentication ===================== @@ -575,10 +550,10 @@ Server Side set interfaces openvpn vtun10 server name-server '172.16.254.30' set interfaces openvpn vtun10 server subnet '10.10.0.0/24' set interfaces openvpn vtun10 server topology 'subnet' - set interfaces openvpn vtun10 tls ca-cert-file '/config/auth/ca.crt' - set interfaces openvpn vtun10 tls cert-file '/config/auth/server.crt' - set interfaces openvpn vtun10 tls dh-file '/config/auth/dh.pem' - set interfaces openvpn vtun10 tls key-file '/config/auth/server.key' + set interfaces openvpn vtun10 tls ca-cert ca-1 + set interfaces openvpn vtun10 tls certificate srv-1 + set interfaces openvpn vtun10 tls crypt-key srv-1 + set interfaces openvpn vtun10 tls dh-params dh-1 set interfaces openvpn vtun10 use-lzo-compression .. _openvpn:client_client: @@ -595,9 +570,9 @@ Client Side set interfaces openvpn vtun10 protocol 'udp' set interfaces openvpn vtun10 remote-host '172.18.201.10' set interfaces openvpn vtun10 remote-port '1194' - set interfaces openvpn vtun10 tls ca-cert-file '/config/auth/ca.crt' - set interfaces openvpn vtun10 tls cert-file '/config/auth/client1.crt' - set interfaces openvpn vtun10 tls key-file '/config/auth/client1.key' + set interfaces openvpn vtun10 tls ca-cert ca-1 + set interfaces openvpn vtun10 tls certificate client-1 + set interfaces openvpn vtun10 tls crypt-key client-1 set interfaces openvpn vtun10 use-lzo-compression Options |