自己搭建远程办公网络及强制离线安装wireguard记录

有时候人不在公司,临时有事需要远程公司电脑处理事情。我们知道公司电脑是在内网中的的,在家里是不能直接访问到的。我们一般使用QQ等支持远程协助的工具,但这样需要有人帮你发起请求,也有免费的软件支持无人值守远程操作,但一般会限速,高峰期经常卡顿。公司正好有台阿里云服务器流量空闲的比较多正好可以用来装个wireguard服务,然后在把公司内网电脑和家里的电脑做为客户端连接上就可以互通 了。

公司阿里云服务器使用的centos 7系统.kernel版本:

# uname -r
3.10.0-1160.15.2.el7.x86_64

可以使用下面的脚步安装:

#!/bin/bash

#判断系统
if [ ! -e '/etc/redhat-release' ]; then
echo "仅支持centos7"
exit
fi
if  [ -n "$(grep ' 6\.' /etc/redhat-release)" ] ;then
echo "仅支持centos7"
exit
fi



#更新内核
update_kernel(){

    yum -y install epel-release curl
    sed -i "0,/enabled=0/s//enabled=1/" /etc/yum.repos.d/epel.repo
    yum remove -y kernel-devel
    rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
    rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
    yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
    yum -y --enablerepo=elrepo-kernel install kernel-ml
    sed -i "s/GRUB_DEFAULT=saved/GRUB_DEFAULT=0/" /etc/default/grub
    grub2-mkconfig -o /boot/grub2/grub.cfg
    wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.1-1.el7.elrepo.x86_64.rpm
    rpm -ivh kernel-ml-devel-4.19.1-1.el7.elrepo.x86_64.rpm
    yum -y --enablerepo=elrepo-kernel install kernel-ml-devel
    read -p "须要重启VPS,再次执行脚本选择安装wireguard,是否如今重启 ? [Y/n] :" yn
	[ -z "${yn}" ] && yn="y"
	if [[ $yn == [Yy] ]]; then
		echo -e "VPS 重启中..."
		reboot
	fi
}

#生成随机端口
rand(){
    min=$1
    max=$(($2-$min+1))
    num=$(cat /dev/urandom | head -n 10 | cksum | awk -F ' ' '{print $1}')
    echo $(($num%$max+$min))  
}

wireguard_update(){
    yum update -y wireguard-dkms wireguard-tools
    echo "更新完成"
}

wireguard_remove(){
    wg-quick down wg0
    yum remove -y wireguard-dkms wireguard-tools
    rm -rf /etc/wireguard/
    echo "卸载完成"
}

config_client(){
cat > /etc/wireguard/client.conf <<-EOF
[Interface]
PrivateKey = $c1
Address = 10.0.0.2/24 
DNS = 114.114.114.114
MTU = 1420

[Peer]
PublicKey = $s2
Endpoint = $serverip:$port
AllowedIPs = 0.0.0.0/0, ::0/0
PersistentKeepalive = 25
EOF

}

#centos7安装wireguard
wireguard_install(){
    curl -Lo /etc/yum.repos.d/wireguard.repo https://copr.fedorainfracloud.org/coprs/jdoss/wireguard/repo/epel-7/jdoss-wireguard-epel-7.repo
    yum install -y dkms gcc-c++ gcc-gfortran glibc-headers glibc-devel libquadmath-devel libtool systemtap systemtap-devel
    yum -y install wireguard-dkms wireguard-tools
    yum -y install qrencode
    mkdir /etc/wireguard
    cd /etc/wireguard
    wg genkey | tee sprivatekey | wg pubkey > spublickey
    wg genkey | tee cprivatekey | wg pubkey > cpublickey
    s1=$(cat sprivatekey)
    s2=$(cat spublickey)
    c1=$(cat cprivatekey)
    c2=$(cat cpublickey)
    serverip=$(curl ipv4.icanhazip.com)
    port=$(rand 10000 60000)
    eth=$(ls /sys/class/net | awk '/^e/{print}')
    chmod 777 -R /etc/wireguard
    systemctl stop firewalld
    systemctl disable firewalld
    yum install -y iptables-services 
    systemctl enable iptables 
    systemctl start iptables 
    iptables -P INPUT ACCEPT
    iptables -P OUTPUT ACCEPT
    iptables -P FORWARD ACCEPT
    iptables -F
    service iptables save
    service iptables restart
    echo 1 > /proc/sys/net/ipv4/ip_forward
    echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
    sysctl -p
cat > /etc/wireguard/wg0.conf <<-EOF
[Interface]
PrivateKey = $s1
Address = 10.0.0.1/24 
PostUp   = echo 1 > /proc/sys/net/ipv4/ip_forward; iptables -A FORWARD -i wg0 -j ACCEPT; iptables -A FORWARD -o wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o $eth -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -o wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o $eth -j MASQUERADE
ListenPort = $port
DNS = 114.114.114
MTU = 1420

[Peer]
PublicKey = $c2
AllowedIPs = 10.0.0.2/24
EOF

    config_client
    wg-quick up wg0
    systemctl enable wg-quick@wg0
    content=$(cat /etc/wireguard/client.conf)
    echo "电脑端请下载client.conf,手机端可直接使用软件扫码"
    echo "${content}" | qrencode -o - -t UTF8
}
add_user(){
    echo -e "\033[37;41m给新用户起个名字,不能和已有用户重复\033[0m"
    read -p "请输入用户名:" newname
    cd /etc/wireguard/
    cp client.conf $newname.conf
    wg genkey | tee temprikey | wg pubkey > tempubkey
    ipnum=$(grep Allowed /etc/wireguard/wg0.conf | tail -1 | awk -F '[ ./]' '{print $6}')
    newnum=$((10#${ipnum}+1))
    sed -i 's%^PrivateKey.*$%'"PrivateKey = $(cat temprikey)"'%' $newname.conf
    sed -i 's%^Address.*$%'"Address = 10.0.0.$newnum\/24"'%' $newname.conf

cat >> /etc/wireguard/wg0.conf <<-EOF
[Peer]
PublicKey = $(cat tempubkey)
AllowedIPs = 10.0.0.$newnum/24
EOF
    wg set wg0 peer $(cat tempubkey) allowed-ips 10.0.0.$newnum/32
    echo -e "\033[37;41m添加完成,文件:/etc/wireguard/$newname.conf\033[0m"
    rm -f temprikey tempubkey
}
#开始菜单
start_menu(){
    clear
    echo "========================="
    echo " 介绍:适用于CentOS7"
    echo " 做者:atrandys"
    echo " 网站:www.atrandys.com"
    echo " Youtube:atrandys"
    echo "========================="
    echo "1. 升级系统内核"
    echo "2. 安装wireguard"
    echo "3. 升级wireguard"
    echo "4. 卸载wireguard"
    echo "5. 显示客户端二维码"
    echo "6. 增长用户"
    echo "0. 退出脚本"
    echo
    read -p "请输入数字:" num
    case "$num" in
    	1)
	update_kernel
	;;
	2)
	wireguard_install
	;;
	3)
	wireguard_update
	;;
	4)
	wireguard_remove
	;;
	5)
	content=$(cat /etc/wireguard/client.conf)
    	echo "${content}" | qrencode -o - -t UTF8
	;;
	6)
	add_user
	;;
	0)
	exit 1
	;;
	*)
	clear
	echo "请输入正确数字"
	sleep 5s
	start_menu
	;;
    esac
}

start_menu

把上面的代码复制到脚步文件如install_wireguard.sh并为文件添加可执行权限。使用root用户或sudo执行脚本文件:

# ./install_wireguard.sh 
=========================
 介绍:适用于CentOS7
 做者:atrandys
 网站:www.atrandys.com
 Youtube:atrandys
=========================
1. 升级系统内核
2. 安装wireguard
3. 升级wireguard
4. 卸载wireguard
5. 显示客户端二维码
6. 增长用户
0. 退出脚本

请输入数字:2

看到菜单2是安装wireguard的,输入2,就开始安装wireguard了。

脚本执行完成后,执行 systemctl status wg-quick@wg0检查是否安装成功:

# systemctl status wg-quick@wg0
[email protected] - WireGuard via wg-quick(8) for wg0
   Loaded: loaded (/usr/lib/systemd/system/[email protected]; enabled; vendor preset: disabled)
   Active: active (exited) since Fri 2021-03-12 10:31:12 CST; 44s ago
     Docs: man:wg-quick(8)
           man:wg(8)
           https://www.wireguard.com/
           https://www.wireguard.com/quickstart/
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg-quick.8
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8
  Process: 28364 ExecStart=/usr/bin/wg-quick up %i (code=exited, status=0/SUCCESS)
 Main PID: 28364 (code=exited, status=0/SUCCESS)

看到active就代表安装成功了.

接下来就可以生成客户端配置文件了.

还是执行install_wireguard.sh,看到目录输入6,也就是增长用户选项:

=========================
 介绍:适用于CentOS7
 做者:atrandys
 网站:www.atrandys.com
 Youtube:atrandys
=========================
1. 升级系统内核
2. 安装wireguard
3. 升级wireguard
4. 卸载wireguard
5. 显示客户端二维码
6. 增长用户
0. 退出脚本

请输入数字:6
给新用户起个名字,不能和已有用户重复
请输入用户名:home

用户名可以自己取,不重复好分辩就好。输入用户名后记得敲回车。

执行成功后就可以在/etc/wirguard/ 目录下找到对应的客户端配置文件了,如home.conf。

再执行一次,生成company.conf文件。

分别把home.conf文件和company.conf文件复制到家里和公司的办公电脑。家里和公司的电脑是windows系统,直接下载对应的安装包安装就可以了,跟安装普通的软件一样.安装好后打开,导入客户端配置文件再点Activate就可以了:

自己搭建远程办公网络及强制离线安装wireguard记录_第1张图片

可以在办公电脑上执行:

ping 10.0.0.1 

如果能ping通就代表组网成功了.

接下来你就可以使用家里的电脑(10.0.0.3)远程访问公司的电脑(10.0.0.4)了。具体IP地址跟客户端添加顺序有关。你可以查看对应客户端配置文件确定其IP:

[Interface]
PrivateKey = aCfyRy96aMx/gLM+SRpnmYWUBGqr+9bdSLk2OyNK7k8=
Address = 10.0.0.3/24
DNS = 114.114.114.114
MTU = 1420

[Peer]

.......

如果需要离线安装wirguard可以直接下载对应的rpm文件,也可以使用yumdownloader在可以联互联网的机器上下载好的rpm文件.

下载好后进入wirguard rpm文件所在目录执行:

rpm -ivh *.rpm --nodeps --force

如果系统先前没有安装iptables-service还需要进入相应rpm文件夹,执行上面的命令安装.

安装成功后修改上面的install_wireguard.sh脚本对应的安装函数:

#centos7安装wireguard
wireguard_install(){
    # curl -Lo /etc/yum.repos.d/wireguard.repo https://copr.fedorainfracloud.org/coprs/jdoss/wireguard/repo/epel-7/jdoss-wireguard-epel-7.repo
    # yum install -y dkms gcc-c++ gcc-gfortran glibc-headers glibc-devel libquadmath-devel libtool systemtap systemtap-devel
    # yum -y install wireguard-dkms wireguard-tools
    # yum -y install qrencode
    # mkdir /etc/wireguard
    cd /etc/wireguard
    wg genkey | tee sprivatekey | wg pubkey > spublickey
    wg genkey | tee cprivatekey | wg pubkey > cpublickey
    s1=$(cat sprivatekey)
    s2=$(cat spublickey)
    c1=$(cat cprivatekey)
    c2=$(cat cpublickey)
    serverip=$(curl ipv4.icanhazip.com)
    port=$(rand 10000 60000)
    eth=$(ls /sys/class/net | awk '/^e/{print}')
    chmod 777 -R /etc/wireguard
    systemctl stop firewalld
    systemctl disable firewalld
    # yum install -y iptables-services 
    systemctl enable iptables 
    systemctl start iptables 
    iptables -P INPUT ACCEPT
    iptables -P OUTPUT ACCEPT
    iptables -P FORWARD ACCEPT
    iptables -F
    service iptables save
    service iptables restart
    echo 1 > /proc/sys/net/ipv4/ip_forward
    echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
    sysctl -p

也就是注释掉了所有需要互联网的操作。然后再执行脚本,选择2:安装wireguard就可以了。添加客户端的方式跟先前在阿里云服务器上一样,不再赘述。

看到这里,都挺顺利的,还没体现强制离线安装。这样提到一次离线安装经历。系统版本也是Centos7,但内核版本是:3.10.0-862.与公司阿里云服务器内核版本基本一样,只是在版本号的最后有点小差别,但就是这么小的差别,安装就是不成功。按照上面的方式离线安装wirguard后,使用systemctl status wg-quick@wg0查看运行失败。使用wg-quick up wg0启动wireguard报:

#sudo wg-quick up wg0

[#] ip link add wg0 type wireguard

Unable to access interface: Protocol not supported

[#]ip link delete dev wg0

Cannot find device "wg0"

通过错误信息搜索问题大多是选择升级内核解决,但目前环境和时间不允许做升级内核操作。只得继续探索,尝试使用dkms build重新编译安装wireguard:

dkms build wirguard/1.0.20210219-1 

竟然报错了,根据错误提示信息是socket.c文件中有错误,找到对应源码文件对应代码行。发现出差的函数跟ipv6有关,还好我们没用ipv6,直接注释掉出错的代码:

自己搭建远程办公网络及强制离线安装wireguard记录_第2张图片

再次执行dkms build成功!然后在执行

dkms install wirguard/1.0.20210219-1 

再次执行wg-quick up wg0启动wireguard就成功了!!!

 

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