重装 OpenSSH
sudo apt remove openssh-server
sudo apt install openssh-server
sudo vim /etc/ssh/sshd_config
sshd_config 关键配置示例
# ssh服务监听端口
Port 2222
# ssh服务监听地址
ListenAddress 0.0.0.0
# ssh服务允许远程root用户登入
PermitRootLogin yes
# ssh服务允许使用用户名密码方式登入
PasswordAuthentication yes
UsePAM yes
X11Forwarding yes
PrintMotd no
Subsystem sftp /usr/lib/openssh/sftp-server
sudo service ssh restart
获取 WSL2 IP
ip addr show eth0 | grep 'inet ' | awk '{print $2}' | cut -d/ -f1
Windows 端口转发设置（PowerShell）
- 添加端口转发规则：
netsh interface portproxy add v4tov4 `
listenaddress=0.0.0.0 listenport=2222 `
connectaddress=172.17.45.15 connectport=2222
- 删除错误的端口转发规则：
netsh interface portproxy delete v4tov4 listenaddress=0.0.0.0 listenport=2222
- 用正确的 WSL IP 重建转发：
netsh interface portproxy add v4tov4 `
listenaddress=0.0.0.0 listenport=2222 `
connectaddress=172.17.45.15 connectport=2222
- 验证端口转发配置：
netsh interface portproxy show v4tov4
你应该看到类似：
0.0.0.0 2222 172.17.45.15 2222
Windows 防火墙放行端口 2222
查看规则：
netsh advfirewall firewall show rule name=WSL2
如果没看到或不正确，再添加规则：
netsh advfirewall firewall add rule `
name="WSL2 SSH" dir=in action=allow protocol=TCP localport=2222
测试连接
- 本机（Windows）上测试：
ssh root@127.0.0.1 -p 2222
- 局域网内其他机器（用 Windows 局域网 IP）：
ssh root@192.168.x.x -p 2222
WSL IP 不固定，自动化更新端口转发的 PowerShell 脚本
# --------------------------------------------
# C:\Scripts\Update-WSL2-SSHPortProxy.ps1
# 自动获取 WSL2 IPv4 并更新 0.0.0.0:2222 转发
# --------------------------------------------
# 1. 调用 hostname -I 拿原始输出（含任何警告）
$raw = wsl.exe hostname -I 2>&1
if (-not $raw) {
Write-Error "Failed to invoke 'wsl hostname -I'."
exit 1
}
# 2. 从所有词中挑出第一个合法 IPv4
$wslIp = ($raw -split '\s+') `
| Where-Object { $_ -match '^\d{1,3}(\.\d{1,3}){3}$' } `
| Select-Object -First 1
if (-not $wslIp) {
Write-Error "Failed to parse a valid IPv4 address. Raw output:`n$raw"
exit 1
}
# **一定会打印出来**
Write-Host "WSL2 IP detected: $wslIp"
# 3. 删除旧的 portproxy（忽略错误）
netsh interface portproxy delete v4tov4 `
listenaddress=0.0.0.0 listenport=2222 2>$null
# 4. 添加新的映射
netsh interface portproxy add v4tov4 `
listenaddress=0.0.0.0 listenport=2222 `
connectaddress=$wslIp connectport=2222
Write-Host "Updated portproxy: 0.0.0.0:2222 -> $wslIp:2222"
# --------------------------------------------
运行脚本命令
powershell.exe -NoProfile -ExecutionPolicy Bypass `
-File "C:\Scripts\Update-WSL2-SSHPortProxy.ps1"
外网连接
- 访问 https://ipinfo.io/ 获取公网 IP（请关闭梯子）
- 路由器上设置端口转发：
- 外部端口（WAN端口）：2222
- 内部 IP：你 Windows 主机的局域网 IP（例如 192.168.123.114）
- 内部端口：2222
- 协议：TCP
- 保存并重启路由器端口转发服务。
- 通过公网 IP 和端口连接：
ssh root@公网IP -p 2222
可选：Windows 开机自动执行脚本
- 打开任务计划程序，创建新任务
- 触发器：系统启动时
- 操作：启动程序
- 程序或脚本：powershell.exe
- 添加参数：
-NoProfile -ExecutionPolicy Bypass -File "C:\Scripts\Update-WSL2-SSHPortProxy.ps1" - 保存并启用任务
很好的文章^_^
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