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137 lines
3.9 KiB
ReStructuredText
==========================
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Virtual Private Networking
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==========================
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A virtual private network secures public network connections and in doing so it
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extends the private network into the public network such as internet. With a VPN
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you can create large secure networks that can act as one private network.
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.. image:: images/Virtual_Private_Network_overview.png
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:width: 100%
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(picture from `wikipedia <https://en.wikipedia.org/wiki/File:Virtual_Private_Network_overview.svg>`__)
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Companies use this technology for connecting branch offices and remote users
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(road warriors).
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OPNsense supports VPN connections for branch offices as well as remote users.
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Creating a single secured private network with multiple branch offices connecting
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to a single site can easily be setup from within the graphical user interface.
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For remote users, certificates can be created and revoked and a simple to use export
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utility makes the client configuration a breeze.
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--------------------------
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Supported VPN technologies
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--------------------------
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OPNsense offers a wide range of VPN technologies ranging from modern SSL VPNs to
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well known IPsec as well as older (now considered insecure) legacy options such as
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L2TP and PPTP.
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.. image:: images/vpn.png
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.. Note::
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VPN technologies displayed with an open lock are considered to be insecure.
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.................................
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Integrated VPN options
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.................................
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Integrated solutions are those that are available within the GUI without installing
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any additional package or plugin. These include:
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* **IPsec**
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* **OpenVPN (SSL VPN)**
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.................................
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Plugin VPN options
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.................................
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Via plugins additional VPN technologies are offered, including:
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* **Legacy L2TP & PPTP**
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* **OpenConnect** - SSL VPN client, initially build to connect to commercial vendor appliances like Cisco ASA or Juniper.
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* **Tinc** - Automatic Full Mesh Routing
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* **WireGuard** - Very simple and fast VPN working with public and private keys.
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* **Zerotier** - seamlessly connect everything, requires account from zerotier.com, free for up to 100 devices.
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-------------
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Log Files
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-------------
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When troubleshooting problems with your firewall, it is very likely you have to check
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the logs available on your system. In the UI of OPNsense, the log files are generally grouped
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with the settings of the component they belong to. The log files can be found here:
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================= =============================================== =====================================
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**IPsec Log** :menuselection:`VPN --> IPsec --> Log File` *Everything around IPsec goes here*
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**OpenVPN Log** :menuselection:`VPN --> OpenVPN --> Log File` *OpenVPN logs everything here*
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================= =============================================== =====================================
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.. Note::
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Log files on file system:
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/var/log/ipsec.log (clog)
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/var/log/openvpn.log (clog)
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-------------
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Configuration
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-------------
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Please read our how-tos for configuration examples and more detailed information.
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..............
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IPsec
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..............
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.. toctree::
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:maxdepth: 2
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:titlesonly:
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how-tos/ipsec-road
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how-tos/ipsec-s2s
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how-tos/ipsec-s2s-route
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how-tos/ipsec-s2s-binat
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how-tos/ipsec-rw
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how-tos/ipsec-rw-android
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how-tos/ipsec-rw-linux
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how-tos/ipsec-rw-srv-eapradius
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how-tos/ipsec-rw-srv-eaptls
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how-tos/ipsec-rw-srv-ikev1xauth
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how-tos/ipsec-rw-srv-mschapv2
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how-tos/ipsec-rw-srv-rsamschapv2
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how-tos/ipsec-rw-w7
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how-tos/ipsec-s2s-route-azure
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..............
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OpenVPN
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..............
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.. toctree::
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:maxdepth: 2
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:titlesonly:
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how-tos/sslvpn_client
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how-tos/sslvpn_s2s
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..............
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Other
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..............
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.. toctree::
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:maxdepth: 2
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:titlesonly:
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how-tos/openconnect
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how-tos/wireguard-s2s
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how-tos/wireguard-client
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how-tos/wireguard-client-azire
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how-tos/wireguard-client-mullvad
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how-tos/zerotier
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