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nas连接有线校园网，验证教程

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江湖小虾
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NAS 有线校园网认证教程 —— 无需浏览器自动认证

一、问题背景

许多 NAS 设备（如飞牛NAS、群晖、威联通等）采用纯命令行界面，没有可视化浏览器，无法通过校园网认证门户完成登录。本文提供一种无需浏览器的解决方案，通过调用校园网认证 API 实现自动认证。

二、适用场景

  • NAS 通过有线网口连接校园网
  • 校园网采用深澜认证系统（或其他支持 API 认证的系统）
  • NAS 无可视化操作界面
  • 需要开机自动认证、定时重认证

三、原理说明

校园网认证系统通常提供 HTTP API 接口，我们可以通过脚本直接调用这些接口完成认证，无需浏览器。典型流程如下：

  1. 获取客户端 IP：调用 /api/v1/ip 接口获取认证服务器看到的 IP 地址
  2. 查询认证状态：调用 /api/v1/pre_login 检查当前 IP 是否已认证
  3. 提交认证请求：调用 /api/v1/login 提交账号密码完成认证

四、部署步骤

4.1 准备脚本

创建认证脚本 njxzc_auth.sh：

#!/bin/bash
# ==================== 用户配置区 ====================
USERNAME="你的学号或工号"
PASSWORD="你的密码"
NET_INTERFACE="enp3s0"  # 你的网卡名称，通过 ip addr show 查看
# ====================================================

AUTH_BASE="http://a.njxzc.edu.cn"
LOG_FILE="/var/log/njxzc_auth.log"
HEADERS=('-H' 'Content-Type: application/json;charset=gbk')

log() {
    local level="$1"; shift
    local msg="[$(date '+%Y-%m-%d %H:%M:%S')] [$level] $*"
    echo "$msg"
    echo "$msg" >> "$LOG_FILE" 2>/dev/null
}

get_local_ip() {
    local ip=""
    if [ -n "$NET_INTERFACE" ]; then
        ip=$(ip addr show "$NET_INTERFACE" 2>/dev/null \
             | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | head -1)
    fi
    echo "$ip"
}

get_server_ip() {
    curl -sf --interface "$NET_INTERFACE" --connect-timeout 5 --max-time 10 \
        "${AUTH_BASE}/api/v1/ip" 2>/dev/null \
        | grep -oP '(?<="data":")[^"]+' | head -1
}

check_status() {
    local ip="$1"
    local resp
    resp=$(curl -sf --interface "$NET_INTERFACE" --connect-timeout 5 --max-time 10 \
        -X POST "${HEADERS[@]}" \
        -d "{\"getuseronlinestate\":\"on_or_off\",\"user_ipadress\":\"${ip}\"}" \
        "${AUTH_BASE}/api/v1/pre_login" 2>/dev/null)
  
    if echo "$resp" | grep -q '"useronlinestate":"on"'; then
        echo "on"
    else
        echo "off"
    fi
}

do_login() {
    local ip="$1"
    local safe_user safe_pass
    safe_user=$(printf '%s' "$USERNAME" | sed 's/\\/\\\\/g; s/"/\\"/g')
    safe_pass=$(printf '%s' "$PASSWORD" | sed 's/\\/\\\\/g; s/"/\\"/g')

    local body="{\"username\":\"${safe_user}\",\"password\":\"${safe_pass}\",\
\"ifautologin\":\"0\",\"channel\":\"_GET\",\"pagesign\":\"firstauth\",\
\"usripadd\":\"${ip}\"}"

    curl -sf --interface "$NET_INTERFACE" --connect-timeout 10 --max-time 20 \
        -X POST "${HEADERS[@]}" -d "$body" "${AUTH_BASE}/api/v1/login" 2>/dev/null
}

# 主流程
log "INFO" "========== 校园网认证开始 =========="
local ip
ip=$(get_server_ip)
[ -z "$ip" ] && ip=$(get_local_ip)

if [ -z "$ip" ]; then
    log "ERROR" "无法获取 IP 地址"
    exit 1
fi
log "INFO" "本机 IP: $ip"

local status
status=$(check_status "$ip")
log "INFO" "当前认证状态: $status"

if [ "$status" = "on" ]; then
    log "INFO" "已处于认证状态"
    exit 0
fi

log "INFO" "正在提交认证请求..."
local resp
resp=$(do_login "$ip")

if echo "$resp" | grep -q '"code":200'; then
    log "INFO" "========== 认证成功！=========="
else
    local errmsg
    errmsg=$(echo "$resp" | grep -oP '(?<="text":")[^"]+')
    log "ERROR" "认证失败: ${errmsg:-$resp}"
    exit 1
fi

4.2 配置参数

编辑脚本顶部配置区：

  • <span>USERNAME</span>：填入你的学号或工号
  • <span>PASSWORD</span>：填入你的密码
  • <span>NET_INTERFACE</span>：填入你的网卡名称

查看网卡名称：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
ip addr show

输出示例：

* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
2: enp3s0:  mtu 1500 ...
    inet 10.11.146.105/21 brd 10.11.151.255 scope global dynamic noprefixroute enp3s0

网卡名称为 <span>enp3s0</span>，IP 为 <span>10.11.146.105</span>。

4.3 上传并赋权

  1. 通过 SSH/SFTP 将脚本上传到 NAS，建议路径：<span>/opt/njxzc_auth/njxzc_auth.sh</span>
  2. 赋予执行权限：
bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
chmod +x /opt/njxzc_auth/njxzc_auth.sh

4.4 手动测试

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
/opt/njxzc_auth/njxzc_auth.sh login

查看日志：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
tail -f /var/log/njxzc_auth.log

4.5 开机自动认证

创建 systemd 服务文件 <span>/etc/systemd/system/njxzc-auth.service</span>：

[Unit]
Description=校园网自动认证
After=network-online.target
Wants=network-online.target

[Service]
Type=oneshot
ExecStart=/opt/njxzc_auth/njxzc_auth.sh login
RemainAfterExit=yes
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

安装并启用服务：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
sudo cp /opt/njxzc_auth/njxzc-auth.service /etc/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable --now njxzc-auth.service

查看服务状态：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
systemctl status njxzc-auth.service

4.6 定时自动重认证

校园网认证可能在长时间无流量后断开，建议每小时自动检测并重认证：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
echo "0 * * * * /opt/njxzc_auth/njxzc_auth.sh login >> /var/log/njxzc_auth.log 2>&1" | crontab -

五、多网卡支持

如果 NAS 有多张有线网卡，可以为每张网卡创建独立认证脚本：

  1. 复制脚本并重命名：

    njxzc_auth_enp3s0.sh

  2. 修改 <span>NET_INTERFACE</span> 为对应网卡名

  3. 创建对应的 systemd 服务

两张网卡可以同时认证，实现冗余保护。

六、故障排查

6.1 无法获取 IP

原因：网卡未获取到 IP 地址或网卡名错误

解决：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
# 检查网卡是否有 IP
ip addr show enp3s0
 
# 如果无 IP，尝试手动获取
sudo dhclient enp3s0

6.2 无法访问认证服务器

原因：路由冲突（如使用了 VPN/组网工具）

解决：在 curl 命令中添加 <span>--interface</span> 参数，强制请求走指定网卡：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square-terminal h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
curl --interface enp3s0 http://a.njxzc.edu.cn/api/v1/ip

6.3 认证失败：用户名或密码错误

原因：账号密码配置错误或密码含特殊字符

解决：检查脚本配置区，确保账号密码正确。密码中的特殊字符（<span>\</span> <span>"</span>）会被脚本自动转义。

6.4 认证成功但无法上网

原因：可能是网卡路由优先级问题

解决：

bash
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-at-sign h-3 w-3" aria-hidden="true">
* xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewbox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy h-3 w-3" aria-hidden="true">
# 查看路由表
ip route show
 
# 查看访问外网走哪张网卡
ip route get 8.8.8.8
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