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--- knowledge_base:useful_software:s2svpn_wg [2021/09/24 19:10] – Externe Bearbeitung 127.0.0.1
+++ knowledge_base:useful_software:s2svpn_wg [2024/11/21 17:40] (aktuell) – add PSK julian.lemmerich
@@ Zeile 18: / Zeile 18: @@
 <code bash>
-apt install wireguard
+apt install wireguard-tools
 </code>
-https://github.com/mjtechguy/wireguard-site-to-site
+Benötigt Linux Kernel 5.6 oder höher.
-==== enable ip forwarding ====
+===== Generating Keys =====
-((https://linuxhint.com/enable_ip_forwarding_ipv4_debian_linux/))
+Beide seiten benötigen unabhängige Keys.
-this has to be done on both server and client.
+<code>
+wg genkey | tee >(wg pubkey)
+</code>
-<file bash /etc/sysctl.conf>
+Für Post-Quanten-Sicheres stuff kann man auch einen PSK generieren. Dieser muss auf beiden Seiten dann identisch sein.
-# Uncomment the next line to enable packet forwarding for IPv4
-net.ipv4.ip_forward=1
-# Uncomment the next line to enable packet forwarding for IPv6
+<code>
-#  Enabling this option disables Stateless Address Autoconfiguration
+wg genpsk
-#  based on Router Advertisements for this host
+</code>
-net.ipv6.conf.all.forwarding=1
-</file>
-==== server config ====
+===== Configuration =====
-<file bash /etc/wireguard/wgx.conf>
+==== "Server" config ====
+<file . /etc/wireguard/wgx.conf>
 [Interface]
 Address = 10.99.x.1/30               # this address is the tunnel address
-ListenPort = 31037                   # this port is the physical port that should be listened on.
+ListenPort = 31037                   # this port is the port that should be listened on.
 PrivateKey = 6GcJf56i5dY30t7tyuGExlJFl/vkiYcyfvDrTJoevWg=
-SaveConfig = false
+# PresharedKey = <psk>               # optional
-PostUp = iptables -A FORWARD -i %i -j ACCEPT
+PostUp = iptables -A FORWARD -i %i -j ACCEPT       # commands here get executed on tunnel up, useful for firewall config for example
 PostDown = iptables -D FORWARD -i %i -j ACCEPT
@@ Zeile 54: / Zeile 54: @@
 #Name = XY
 PublicKey = KSODnmNkJG+ASAirrpmZJhEHwnCNoa7fIhvBS/txJQY=
-AllowedIPs = 192.168.10.0/24,192.168.11.0/24,192.168.12.0/24,192.168.13.0/24,192.168.14.0/24,192.168.15.0/24,10.98.3.0/30,10.99.3.2/32 # this is an example list of allowed ips taken from n02
+AllowedIPs = 192.168.11.0/24         # IP-Space of the Client that is allowed to be routed through.
 </file>
-==== client conf ====
+==== "Client" conf ====
-<file bash /etc/wireguard/wgx.conf>
+<file . /etc/wireguard/wgx.conf>
 [Interface]
 Address = 10.99.x.2/30
+#ListenPort = 51820                  # If ListenPort is not set, a random port is chosen. For example for a Client behind NAT this is not needed
 PrivateKey = qEX8Ag5QmckFHRGX8Cg308N1XXzfp3VXE2MKYPlA2Eo=
+#PresharedKey = <psk>                # optional
 PostUp = iptables -A FORWARD -i %i -j ACCEPT
@@ Zeile 69: / Zeile 71: @@
 [Peer]
 PublicKey = 28b1ickTXZiU5XtZbsj6YJuzhkcJXrNP145C3MGBQS0=
-AllowedIPs = 192.168.8.0/21,192.168.16.0/21,192.168.24.0/22,10.98.2.0/30,10.99.3.1/30,10.99.7.1/32   # this is a bit of a collapsed view of my home networks
+AllowedIPs = 0.0.0.0/0               # this means everything is routed. For a split tunnel, only route certain subnets.
-Endpoint = 130.83.6.100:31037
+Endpoint = 130.83.6.100:31037        # This Client will reach out to the hardcoded Endpoint. It can be specified on both sides.
-PersistentKeepalive = 2
+PersistentKeepalive = 25             # Send a keepalive packet every 25s
 </file>
@@ Zeile 81: / Zeile 83: @@
 ==== always start wg ====
-on both server and client
 <code>

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