Wii's talking ground

Appearance

WireGuard ​

使用步骤 ​

  • 使用 wg genkey 和 wg pubkey 在每个节点创建公钥和私钥
  • 配置
    • 主中继服务器（main relay server）
      • [Interface]
        • 确保在定义服务器可接收的路由地址时，指定整个 VPN 网络的 CIDR 范围
          • Address = 192.0.2.1/24
      • [Peer]
        • 为每个需要加入到 VPN 网络的客户端创建一个 [Peer]，使用对应的公钥（public key）
    • 客户端节点（client node）
      • [Interface]
        • 指定单个 IP，不中继流量
          • Address = 192.0.2.3/32
      • [Peer]
        • 为每个可以公开访问的 Peer 创建一个 [Peer]
        • 在定义作为跳板服务器（Bounce Server）的远程对等体时，确保为整个VPN子网指定一个CIDR范围
          • AllowedIPs = 192.0.2.1/24
        • 确保为不中继流量且仅充当简单客户端的远程对等点指定单独的 IP
          • AllowedIPs = 192.0.2.3/32
    • 启动中继节点
      • wg-quick up /full/path/to/wg0.conf
    • 启动客户端节点
      • wg-quick up /full/path/to/wg0.conf

准备 ​

Ubuntu ​

shell
$ sudo vim /etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
$ sudo sysctl -p
$ sudo ufw allow 51820/udp
# 重启 ufw
$ sudo ufw disable
$ sudo ufw enable

配置 ​

字段 ​

  • AllowedIPs : 路由目的网络
shell
# 安装
apt install wireguard -y

# 添加网络接口
ip link add dev wg0 type wireguard
ip address add dev wg0 10.0.2.1/24

# 生成密钥
wg genkey | tee server-private.key | wg pubkey | tee server-public.key

命令 ​

跳板服务器开启中继和转发

shell
echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
echo "net.ipv4.conf.all.proxy_arp = 1" >> /etc/sysctl.conf
sudo sysctl -p /etc/sysctl.conf

生成公钥、私钥 ​

shell
# generate private key
wg genkey > example.key

# generate public key
wg pubkey < example.key > example.key.pub

启停 ​

shell
wg-quick up /full/path/to/wg0.conf
wg-quick down /full/path/to/wg0.conf
# Note: you must specify the absolute path to wg0.conf, relative paths won't work

# start/stop VPN network interface
ip link set wg0 up
ip link set wg0 down

# register/unregister VPN network interface
ip link add dev wg0 type wireguard
ip link delete dev wg0

# register/unregister local VPN address
ip address add dev wg0 192.0.2.3/32
ip address delete dev wg0 192.0.2.3/32

# register/unregister VPN route
ip route add 192.0.2.3/32 dev wg0
ip route delete 192.0.2.3/32 dev wg0

注意 ​

  • 如果一个节点在 NAT 内，在配置远端 Peer 时需要配置 PersistentKeepalive ，这样远端 Peer 才能访问当前 Node
yaml
[Peer]
Endpoint = <ip:port>
PublicKey = <public-key>
AllowedIPs = 10.0.10.1/24
PersistentKeepalive = 25

其他 ​

预设

shell
# vpn 网络
10.110.10.1/24
# 示例 client 地址
10.110.10.100/24
# 网络接口
ens18
# server 地址
192.168.6.192

# server 端密钥对
PUBLICKEY = HsNTZwNRji31XuNAhx+eMOD8y7CZEeoPEUzZWZXpqg0=
PRIVATEKEY = UHIqicenzBJQ6gnsSHqrvZbEEbjz6NJfl1qc4UgpMm8=

# client 端密钥对
PUBLICKey = KLL6tm7wiU/ouenCktUwThss5Jw9Xr79C+3u3QRnYCQ= 
PRIVATEKEY = oNLv6Ntj5iHulThhcCtZ0jYtRV0CTsC4d6rJkWo21FY=

配置模板

shell
[Interface]
## Address : A private IP address for wg0 interface.
Address = 10.110.10.1/24
 
## Specify the listening port of WireGuard, I like port 33333, you can change it.
ListenPort = 51820
 
## A privatekey of the server ( cat /etc/wireguard/server-private.key)
PrivateKey = {private-key-of-server}

## The PostUp will run when the WireGuard Server starts the virtual VPN tunnel.
## The PostDown rules run when the WireGuard Server stops the virtual VPN tunnel.
## Specify the command that allows traffic to leave the server and give the VPN clients access to the Internet. 
## Replace enp1s0 = Your-Network-Interface-Name

PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o {Your-Network-Interface-Name} -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o {Your-Network-Interface-Name} -j MASQUERADE
shell
[Interface]
Address = 10.110.10.1/24
ListenPort = 51820
PrivateKey = UHIqicenzBJQ6gnsSHqrvZbEEbjz6NJfl1qc4UgpMm8=

PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o ens18 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o ens18 -j MASQUERADE

服务

shell
systemctl start wg-quick@wg0
systemctl enable wg-quick@wg0
systemctl status wg-quick@wg0.service

# 查看状态
wg show wg0

客户端配置

shell
# 重新生成密钥和公钥
[Interface]
PrivateKey = PrivateKey_of_the_Client
Address = IP_UNDER_VPN

[Peer]
###Public of the WireGuard VPN Server
PublicKey = PublicKey_of_the_Server

### IP and Port of the WireGuard VPN Server
Endpoint = IP_of_the_Sever:Port_VPN_of_the_Server

### Allow all traffic
AllowedIPs = 0.0.0.0/0
shell
# 重新生成密钥和公钥
[Interface]
PrivateKey = oNLv6Ntj5iHulThhcCtZ0jYtRV0CTsC4d6rJkWo21FY=
Address = 10.110.10.100/24

[Peer]
PublicKey = HsNTZwNRji31XuNAhx+eMOD8y7CZEeoPEUzZWZXpqg0=
Endpoint = 192.168.6.192:51820
AllowedIPs = 0.0.0.0/0

服务端添加 Peer

shell
wg set wg0 peer {client-public-key} allowed-ips 10.110.10.100

# 示例
wg set wg0 peer KLL6tm7wiU/ouenCktUwThss5Jw9Xr79C+3u3QRnYCQ= allowed-ips 10.110.10.100

访问 Local Network ​

shell
PostUp = ufw route allow in on wg0 out on eth0
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT
PostUp = ip6tables -A FORWARD -i wg0 -j ACCEPT
PostUp = iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE
PostUp = ip6tables -t nat -I POSTROUTING -o eth0 -j MASQUERADE
PreDown = ufw route delete allow in on wg0 out on eth0
PreDown = iptables -D FORWARD -i wg0 -j ACCEPT
PreDown = ip6tables -D FORWARD -i wg0 -j ACCEPT
PreDown = iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE
PreDown = ip6tables -t nat -D POSTROUTING -o eth0 -j MASQUERADE

注意以下配置

shell
$ sudo vim /etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
$ sudo sysctl -p
$ sudo ufw allow 51820/udp
# 重启 ufw
$ sudo ufw disable
$ sudo ufw enable

常见问题 ​

无法访问远端内网 ​

首先，客户端配置远端地址段。

shell
[Peer]
Endpoint = {remote_ip:port}
PublicKey = {public_key}
AllowedIPs = 10.0.20.0/24     # wireguard 组网地址
AllowedIPs = 192.168.6.0/24   # 远端内网地址
AllowedIPs = 192.168.1.0/24   # 远端内网地址

其次，配置远端服务器网络 forward。

shell
$ sudo vim /etc/sysctl.conf
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
$ sudo sysctl -p
$ sudo ufw allow 51820/udp

参考 ​

参考 参考二

端口连通性判断 ​

shell
$ nc -z -v -u 127.0.0.1 51820
Connection to 127.0.0.1 port 51820 [udp/*] succeeded!

Debug ​

shell
$ sudo wg show

凡事预则立 不预则废