The ungleich VPN infrastructure » History » Revision 15
Revision 14 (Nico Schottelius, 02/02/2019 08:27 AM) → Revision 15/31 (Nico Schottelius, 02/16/2019 12:33 PM)
h1. The ungleich VPN infrastructure
{{toc}}
h2. Status
This document is *IN PRODUCTION*.
h2. Security of IPv6 vs. NAT
A quick reminder: whether you are using private RFC1918 IPv4 addresses or IPv6 addresses, if you don't want people to access your network, you need to configure a firewall.
h2. Wireguard VPN on vpn-2a0ae5c1.ungleich.ch
* Server: vpn-2a0ae5c1.ungleich.ch
* Port: 51820
* Requires a public key
* Client network: 2a0a:e5c1:100::/40
* Client network size: /48
h3. How to add a new customer connection
* Get the public key of the customer
* Edit dot-cdist/type/__ungleich_wireguard/manifest and add the new network definition at the end of the file
* Let the customer know their network
h3. Sample clustomer client configuration
* "Install wireguard":https://www.wireguard.com/install/
* Create your private key: @umask 077; wg genkey > privkey@
* Get your public key: @wg pubkey < privkey@
** You need to send this pubkey to ungleich
* You will get your network definition after we have received your public key
* Create /etc/wireguard/wg0.conf
<pre>
[Interface]
PrivateKey = YOURKEYHERE
Address = YOURIPv6IPADDRESSHERE/48
ListenPort = 51280
[Peer]
PublicKey = hi60lGP+xEUQ+kVnqA7PlJAO1SVqTS1W36g0LhFP0xQ=
Endpoint = vpn-2a0ae5c1.ungleich.ch:51820
AllowedIPs = ::/0
</pre>
h3. How to setup the VPN (the easy way)
Once you have created the configuration, you can simply call
<pre>
wg-quick up wg0
</pre>
And to stop the VPN, you can use
<pre>
wg-quick down wg0
</pre>
h3. How to setup the VPN (the manual way)
Commands for setting it up
<pre>
MY_NET=2a0a:e5c1:XXXX::1/48
ip link add dev wg0 type wireguard
# Replace with your range
ip addr add $MY_NET dev wg0
# Add routing
ip route add 2a0a:e5c1::/32 dev wg0
ip route add ::/0 via 2a0a:e5c1:100::1
# Configure the interface
wg setconf wg0 /etc/wireguard/wg0.conf
# Bring it up
ip link set wg0 up
</pre>
h3. About usable IPv6 addresses
We route a /48 to everyone. Even though technically possible, you should not use the *zero address* of your network, as it is reserved for reaching all routers.
I.e. if your IPv6 network was 2a0a:e5c1:101::/48, don't use 2a0a:e5c1:101::. The reason for this is that all routers (devices that have ip forwarding enabled) for this network
are supposed to answer on this address.
In other words, in your wg0.conf use:
<pre>
[Interface]
...
Address = 2a0a:e5c1:101::42/48
</pre>
Do *NOT* use:
<pre>
[Interface]
...
# Don't use this
Address = 2a0a:e5c1:101::/48
</pre>
h3. How to debug
* wg show # Show configuration
* ping 2a0a:e5c1:100::1 # Try to ping the gateway
h3. Sample server configuration
This is just for reference - as a client you don't need this configuration
/etc/wireguard/wg0.conf:
<pre>
[Interface]
ListenPort = 51820
PrivateKey = SERVERKEYHERE
# Nico, 2019-01-23
[Peer]
PublicKey = kL1S/Ipq6NkFf1MAsNRou4b9VoUsnnb4ZxgiBrH0zA8=
AllowedIPs = 2a0a:e5c1:101::/48
# Customer networks below
# ...
</pre>
Sample server rc.local:
<pre>
ip link add dev wg0 type wireguard
ip addr add 2a0a:e5c1:100::1/40 dev wg0
wg setconf wg0 /etc/wireguard/wg0.conf
ip link set wg0 up
</pre>
h2. OpenVPN on openvpn.ungleich.ch
* Server: openvpn.ungleich.ch
* Port: 1195
* Requires a certificate
* Address range: 2a0a:e5c0:3::/48
** Client networks are /64