CentOS 7 离线拨号（PPPOE）

淡淡的烟草味﹌ 2022-06-04 02:19 426阅读 0赞

## CentOS 7 离线拨号（PPPOE） ##

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> 逛了一圈，就是没有找到离线拨号的教程，我就很好奇，如果电脑有网，那还要拨什么号。无奈下就自己想着下载好拨号工具再安装的方案，然后测试就成功了，故在这记录下安装过程，防以后再用到。

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> 教程使用的 CentOS 版本为 CentOS 7.4 mini，其它版本请自行做相应修改。

### 1.准备所有的安装包 ###

> 由于我们要在没有网的CentOS里面安装拨号工具，所以要提前下载好安装包。
> 
> 拨号工具 打包（拨号工具及其依赖）：  
> CentOS 7.4 版：[http://download.csdn.net/download/kxwinxp/10141260][http_download.csdn.net_download_kxwinxp_10141260]  
> CentOS 6.9 版：[http://download.csdn.net/download/kxwinxp/10141264][http_download.csdn.net_download_kxwinxp_10141264]

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#### 1.1）下载拨号工具及其依赖 ####

> 打开 rpm 包下载网址：[http://rpm.pbone.net][http_rpm.pbone.net]  
> 设置高级搜索，选择 CentOS 7 的包

![这里写图片描述][SouthEast]

> 分别搜索如下包（自行选择对应版本），并下载下来

*  [libpcap-1.5.3-9.el7.x86\_64.rpm][libpcap-1.5.3-9.el7.x86_64.rpm]
 *  [ppp-2.4.5-33.el7.x86\_64.rpm][ppp-2.4.5-33.el7.x86_64.rpm]
 *  [net-tools-2.0-0.22.20131004git.el7.x86\_64.rpm][net-tools-2.0-0.22.20131004git.el7.x86_64.rpm]
 *  [rp-pppoe-3.11-7.el7.x86\_64.rpm][rp-pppoe-3.11-7.el7.x86_64.rpm]

> 自行把下载好的安装包拷贝到U盘！

### 2.挂载U盘，拷贝rpm安装包到CentOS ###

// 加载USB模块
    modprobe usb-storage
    
    // 查看U盘设备
    fdisk -l
    
    Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048     2099199     1048576   83  Linux
    /dev/sda2         2099200    41943039    19921920   8e  Linux LVM
    /dev/sdb4            2048    14039    2015920   8e  FAT32
    // 这里假设U盘是sdb4
    
    // 建立要挂载的目录
    mkdir -p /mnt/usbdisk
    // 挂载U盘
    mount /dev/sdb4 /mnt/usbdisk

// 卸载U盘
    umount /mnt/usb

### 3.安装拨号工具及其依赖 ###

// 进入安装包目录
    cd /mnt/usbdisk/rp-pppoe
    // 安装
    rpm -ivh libpcap-1.5.3-9.el7.x86_64.rpm ppp-2.4.5-33.el7.x86_64.rpm net-tools-2.0-0.22.20131004git.el7.x86_64.rpm rp-pppoe-3.11-7.el7.x86_64.rpm

### 4.配置pppoe拨号 ###

// 查看当前以太网卡代号
    ip address
    
    enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
            ether 20:1b:06:3d:22:05  txqueuelen 1000  (Ethernet)
    
    lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
            inet 127.0.0.1  netmask 255.0.0.0
    
    // 那么我这的以太网卡代号就是 enp1s0 （等下要用到）
    
    // 开始设置
    pppoe-setup
    
    // 输入ISP提供的账户（拨号账号）
    Enter your Login Name (default root):sz20012231@163.gd
    
    // 输入以太网卡代号，根据刚刚查到的（enp1s0）
    (default eth0):enp1s0
    
    // 配置：若长时间连线，连线会被自动中断（否 no）
    Enter the demand value (default no): no
    
    // 配置主DNS服务器（8.8.8.8）
    Enter the DNS information here:8.8.8.8
    
    // 配置次DNS服务器（8.8.4.4）
    Enter the secondary DNS server address here:8.8.4.4
    
    // 两次输入账户密码以确认（拨号密码）
    Please enter your Password: 
    Please re-enter your Password:
    
    // 配置普通账户是否有网络连接权限（允许 yes）
    normal user to start or stop DSL connection (default yes):yes
    
    // 配置防火墙（无限制 0）
    Choose a type of firewall (0-2): 0
    
    // 配置是否开机自动拨号连接（开启 yes）
    Please enter no or yes (default no):yes
    
    // 确认刚填写的配置信息（确认 y）
    Accept these settings and adjust configuration files (y/n)? y
    
    // 开启拨号网络
    ifup ppp0

### 5.自动配置pppoe脚本 ###

> 如果你觉得一步步输入确认很麻烦，那么，这个自动配置代码将很有用。

// 请保存为ppp_auto.sh
    #!/bin/bash 
    ppp_user=$1
    password=$2
    eth=$3
    
    [ -z "$ppp_user" ]&&{
    echo "没有指定拨号账号..."
    echo "示例: $0 user password ethx"
    exit 0
    }
    
    [ -z "$password" ]&&{
    echo "没有指定拨号密码..."
    echo "示例: $0 user password ethx"
    exit 0
    }
    
    [ -z "$eth" ]&&{
    echo "没有指定拨号网卡..."
    echo "示例: $0 user password ethx"
    exit 0
    }
    
    echo "请等待,正在进行配置..."
    
    ppps=`ps -ef|grep ppp0|grep -v "grep"|wc -l`
    if [ $ppps -gt 0 ];then
        ifdown ppp0;
    fi
    
    
    if [ -d "/etc/sysconfig/network-scripts/ifcfg-ppp0" ];then
        echo "" > /etc/sysconfig/network-scripts/ifcfg-ppp0
    else
        touch /etc/sysconfig/network-scripts/ifcfg-ppp0
    fi
    
    echo "USERCTL=yes" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "BOOTPROTO=dialup" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "NAME=DSLppp0" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "DEVICE=ppp0" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "TYPE=xDSL" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "ONBOOT=yes" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "PIDFILE=/var/run/pppoe-adsl.pid" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "FIREWALL=NONE" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "PING=." >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "PPPOE_TIMEOUT=80" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "LCP_FAILURE=3" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "LCP_INTERVAL=20" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "CLAMPMSS=1412" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "CONNECT_POLL=6" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "CONNECT_TIMEOUT=60" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "DEFROUTE=yes" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "SYNCHRONOUS=no" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "ETH=$eth" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "PROVIDER=DSLppp0" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "USER=$ppp_user" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "PEERDNS=no" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    echo "DEMAND=no" >> /etc/sysconfig/network-scripts/ifcfg-ppp0
    
    
    line1=`cat /etc/ppp/chap-secrets|grep "*"|wc -l`
    
    if [ $line1 -lt 1 ];then
        echo "\"$ppp_user\" * \"$password\"" >  /etc/ppp/chap-secrets
    else
        user=`cat /etc/ppp/chap-secrets|grep "*"|awk '{print$1}'`
        passwd=`cat /etc/ppp/chap-secrets|grep "*"|awk '{print$3}'`
        sed -i "s/$user/\"$ppp_user\"/g" /etc/ppp/chap-secrets
        sed -i "s/$passwd/\"$password\"/g" /etc/ppp/chap-secrets
    fi
    
    line2=`cat /etc/ppp/pap-secrets|grep "*"|wc -l`
    
    if [ $line1 -lt 1 ];then
            echo "\"$ppp_user\" * \"$password\"" >> /etc/ppp/pap-secrets
    else
            user=`cat /etc/ppp/pap-secrets|grep "*"|awk '{print$1}'`
            passwd=`cat /etc/ppp/pap-secrets|grep "*"|awk '{print$3}'`
            sed -i "s/$user/\"$ppp_user\"/g" /etc/ppp/pap-secrets
            sed -i "s/$passwd/\"$password\"/g" /etc/ppp/pap-secrets
    fi
    
    
    ck=`cat /sbin/ifup|grep "routeok"|wc -l`
    
    if [ $ck -lt 1 ];then
            sed -i "s/exec \${OTHERSCRIPT} \${CONFIG} \$2//g" /sbin/ifup
    
            echo "#route" >> /sbin/ifup
            echo "{" >> /sbin/ifup
            echo "sleep 10" >> /sbin/ifup
            echo "route_ip=\`/sbin/pppoe-status|grep \"inet\"|awk '{print\$4}'|awk -F\/ '{print\$1}'\`" >> /sbin/ifup
            echo "len=\`echo \$route_ip|wc -c\`" >> /sbin/ifup
            echo "if [ \$len -gt 10 ];then" >> /sbin/ifup
            echo " route add default gw \$route_ip dev ppp0" >> /sbin/ifup
            echo "fi" >> /sbin/ifup
            echo "}&" >> /sbin/ifup
            echo "" >> /sbin/ifup
            echo "exec \${OTHERSCRIPT} \${CONFIG} \$2" >> /sbin/ifup
            echo "" >> /sbin/ifup
            echo "#routeok" >> /sbin/ifup
    fi
    
    ifup ppp0
    if [ $? -eq 0 ];then
        echo "ifup ok"
    else
        echo "配置失败,请重新配置，比如重新选择网卡或者确认账号密码？"
    fi

> 执行：`./ppp_auto.sh sz20012231@163.gd 123456 enp1s0` 即可自动配置  
> 第一个参数是账号，第二个是密码，第三个是以太网卡代号

[http_download.csdn.net_download_kxwinxp_10141260]: http://download.csdn.net/download/kxwinxp/10141260
[http_download.csdn.net_download_kxwinxp_10141264]: http://download.csdn.net/download/kxwinxp/10141264
[http_rpm.pbone.net]: http://rpm.pbone.net
[SouthEast]: /images/20220604/3b1fb455a4ed448195edd714717ea2f8.png
[libpcap-1.5.3-9.el7.x86_64.rpm]: ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/libpcap-1.5.3-9.el7.x86_64.rpm
[ppp-2.4.5-33.el7.x86_64.rpm]: ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/ppp-2.4.5-33.el7.x86_64.rpm
[net-tools-2.0-0.22.20131004git.el7.x86_64.rpm]: ftp://ftp.pbone.net/mirror/ftp.centos.org/7.4.1708/os/x86_64/Packages/net-tools-2.0-0.22.20131004git.el7.x86_64.rpm
[rp-pppoe-3.11-7.el7.x86_64.rpm]: ftp://mirror.switch.ch/pool/4/mirror/centos/7.4.1708/os/x86_64/Packages/rp-pppoe-3.11-7.el7.x86_64.rpm