[Linux SOP] Linux 部署及安全实践指南 (其一)

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# 不会有系统没装 wget 吧, 没有就 `apt update && apt install wget` 一下
wget --no-check-certificate -qO InstallNET.sh 'https://raw.githubusercontent.com/leitbogioro/Tools/master/Linux_reinstall/InstallNET.sh'
# 如果是中国大陆的机器, 用下面这个
# wget --no-check-certificate -qO InstallNET.sh 'https://gitee.com/mb9e8j2/Tools/raw/master/Linux_reinstall/InstallNET.sh' && chmod a+x InstallNET.sh

chmod a+x InstallNET.sh

# 不加参数 `-debian` 时默认安装当前系统, 但本文基于 Debian
# 不管你原来的系统是什么, 一律安装 Debian 最新稳定版本 (当前为 Debian 12 Bookworm)
./InstallNET.sh -debian

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mv /etc/apt/sources.list /etc/apt/sources.list.bak

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# 在 apt 2.1.9 及以后的版本中, apt 的 HTTP Pipelining 特性
# 与 Nginx 服务器疑似存在一定的不兼容问题，可能导致出现偶发
# 的 Connection reset by peer 错误, 可选择性关闭之 (取消注释下面这行)
# echo "Acquire::http::Pipeline-Depth \"0\";" > /etc/apt/apt.conf.d/99nopipelining

apt update && apt upgrade -y && apt dist-upgrade -y && apt full-upgrade -y && apt autoremove -y

# 安装常用工具
apt install sudo curl wget build-essential apt-transport-https ca-certificates dnsutils zip unzip iftop htop zsh bat autojump fontconfig git mtr-tiny lsof -y

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hostnamectl set-hostname {new name}

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ssh-keygen -t ed25519 -C "{密钥注释}"

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# 备份一下, 养成习惯
cp ~/.ssh/authorized_keys ~/.ssh/authorized_keys.bak

# 改成自己的公钥!!!
cat <<'EOF' > ~/.ssh/authorized_keys
ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMz2IFBt+FWJc750FHf5hFt7UeXqF4gCet7td+FX5FlX Test
EOF

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# 备份一下, 养成习惯
mv /etc/ssh/sshd_config /etc/ssh/sshd_config.bak

cat <<'TEXT' > /etc/ssh/sshd_config
Include /etc/ssh/sshd_config.d/*.conf

# 配置 SSH 端口, 默认 22
# Port 22
AddressFamily any
# ListenAddress 127.0.0.1
# ListenAddress ::

# Ciphers and keying
# RekeyLimit default none

# Log facility
SyslogFacility AUTH
LogLevel INFO

# Authentication
# Must login within 2 minutes
LoginGraceTime 2m
# Allow root
PermitRootLogin yes
# Check home dir and config files' permission before connection
StrictModes yes
# Max auth attempt
MaxAuthTries 6
# Max concurrent sessions
MaxSessions 16
# Pubkey auth
PubkeyAuthentication yes
# Disallow password login
# 注意: 如果你要密码登陆, 请改为 yes
PasswordAuthentication no
# Disallow empty password
PermitEmptyPasswords no
# Disable challenge-response
ChallengeResponseAuthentication no
# Use PAM
UsePAM yes
# X11 Forwarding
X11Forwarding yes
# X11DisplayOffset 10
# X11UseLocalhost yes
# Print /etc/motd
PrintMotd no
# Print last login log
PrintLastLog yes
# TCP Keepalive
TCPKeepAlive yes
ClientAliveInterval 120
ClientAliveCountMax 10
# PID
PidFile /var/run/sshd.pid
# Allow client to pass locale environment variables
AcceptEnv LANG LC_*
# override default of no subsystems
Subsystem sftp /usr/lib/openssh/sftp-server
TEXT

# 重启 sshd

service sshd restart

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sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"
# 配置zsh插件
git clone --depth=1 https://github.com/romkatv/powerlevel10k.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k
git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting
git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions

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cat <<'TEXT' >  ~/.zshrc
# PROXY SETTING
export proxy=""
# export proxy="http://127.0.0.1:11100" # 自己根据实际情况配置代理
export http_proxy=$proxy
export https_proxy=$proxy
export ftp_proxy=$proxy

# Enable Powerlevel10k instant prompt. Should stay close to the top of ~/.zshrc.
# Initialization code that may require console input (password prompts, [y/n]
# confirmations, etc.) must go above this block; everything else may go below.
if [[ -r "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh" ]]; then
  source "${XDG_CACHE_HOME:-$HOME/.cache}/p10k-instant-prompt-${(%):-%n}.zsh"
fi

# Path to your oh-my-zsh installation.
export ZSH=$HOME/.oh-my-zsh

# Set name of the theme to load
ZSH_THEME="powerlevel10k/powerlevel10k"

# Uncomment the following line to use case-sensitive completion.
CASE_SENSITIVE="true"

# Uncomment the following line to use hyphen-insensitive completion.
# Case-sensitive completion must be off. _ and - will be interchangeable.
# HYPHEN_INSENSITIVE="true"

# Uncomment one of the following lines to change the auto-update behavior
# zstyle ':omz:update' mode disabled  # disable automatic updates
zstyle ':omz:update' mode auto      # update automatically without asking
# zstyle ':omz:update' mode reminder  # just remind me to update when it's time

# Uncomment the following line to change how often to auto-update (in days).
# zstyle ':omz:update' frequency 13

# Uncomment the following line if pasting URLs and other text is messed up.
# DISABLE_MAGIC_FUNCTIONS="true"

# Uncomment the following line to disable colors in ls.
# DISABLE_LS_COLORS="true"

# Uncomment the following line to disable auto-setting terminal title.
# DISABLE_AUTO_TITLE="true"

# Uncomment the following line to enable command auto-correction.
ENABLE_CORRECTION="true"

# Uncomment the following line to display red dots whilst waiting for completion.
# You can also set it to another string to have that shown instead of the default red dots.
# e.g. COMPLETION_WAITING_DOTS="%F{yellow}waiting...%f"
# Caution: this setting can cause issues with multiline prompts in zsh < 5.7.1 (see #5765)
# COMPLETION_WAITING_DOTS="true"

# Uncomment the following line if you want to disable marking untracked files
# under VCS as dirty. This makes repository status check for large repositories
# much, much faster.
# DISABLE_UNTRACKED_FILES_DIRTY="true"

# Uncomment the following line if you want to change the command execution time
# stamp shown in the history command output.
# You can set one of the optional three formats:
# "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
# or set a custom format using the strftime function format specifications,
# see 'man strftime' for details.
# HIST_STAMPS="mm/dd/yyyy"

# Which plugins would you like to load?
# Standard plugins can be found in $ZSH/plugins/
# Custom plugins may be added to $ZSH_CUSTOM/plugins/
# Example format: plugins=(rails git textmate ruby lighthouse)
# Add wisely, as too many plugins slow down shell startup.
plugins=(
     git
     extract
     autojump
     zsh-syntax-highlighting
     zsh-autosuggestions
     command-not-found
     colored-man-pages
)

source $ZSH/oh-my-zsh.sh

# User configuration

# export MANPATH="/usr/local/man:$MANPATH"

# You may need to manually set your language environment
# export LANG=en_US.UTF-8

# Preferred editor for local and remote sessions
# if [[ -n $SSH_CONNECTION ]]; then
#   export EDITOR='vim'
# else
#   export EDITOR='mvim'
# fi

# Compilation flags
# export ARCHFLAGS="-arch x86_64"

# Set personal aliases, overriding those provided by oh-my-zsh libs,
# plugins, and themes. Aliases can be placed here, though oh-my-zsh
# users are encouraged to define aliases within the ZSH_CUSTOM folder.
# For a full list of active aliases, run `alias`.
#
# Example aliases
# alias zshconfig="mate ~/.zshrc"
# alias ohmyzsh="mate ~/.oh-my-zsh"
source ~/.p10k.terminal.zsh

# Other Settings
alias ls='ls --color=auto'
alias grep='grep --color=auto'
alias ll='ls -lh'
alias la='ls -A'
alias l='ls -CF'
alias cp='cp -i'
alias cat='batcat --paging=never -p'

# autosuggestions
export TERM=xterm-256color
ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE="fg=8"

# Fix numeric keypad
# 0 . Enter
bindkey -s "^[Op" "0"
bindkey -s "^[On" "."
bindkey -s "^[OM" "^M"
# 1 2 3
bindkey -s "^[Oq" "1"
bindkey -s "^[Or" "2"
bindkey -s "^[Os" "3"
# 4 5 6
bindkey -s "^[Ot" "4"
bindkey -s "^[Ou" "5"
bindkey -s "^[Ov" "6"
# 7 8 9
bindkey -s "^[Ow" "7"
bindkey -s "^[Ox" "8"
bindkey -s "^[Oy" "9"
# + - * /
bindkey -s "^[Ol" "+"
bindkey -s "^[Om" "-"
bindkey -s "^[Oj" "*"
bindkey -s "^[Oo" "/"

TEXT

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apt install ufw
ufw default deny incoming
ufw default allow outgoing
# 根据实际情况 allow, 不知道具体语法可以问 AI 哦
ufw allow 22

ufw enable

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wget -O check_x86-64_psabi.sh https://dl.xanmod.org/check_x86-64_psabi.sh && chmod +x check_x86-64_psabi.sh && ./check_x86-64_psabi.sh

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apt install gpg
wget -qO - https://gitlab.com/afrd.gpg | sudo gpg --dearmor -vo /etc/apt/keyrings/xanmod-archive-keyring.gpg

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echo 'deb [signed-by=/etc/apt/keyrings/xanmod-archive-keyring.gpg] http://deb.xanmod.org releases main' | sudo tee /etc/apt/sources.list.d/xanmod-release.list

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apt update && apt install linux-xanmod-x64v2

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cat <<'TEXT' > /etc/sysctl.conf
# ------ 网络调优: 基本 ------
# TTL 配置, Linux 默认 64
# net.ipv4.ip_default_ttl=64

# 参阅 RFC 1323. 应当启用.
net.ipv4.tcp_timestamps=1
# ------ END 网络调优: 基本 ------

# ------ 网络调优: 内核 Backlog 队列和缓存相关 ------
# Ref: https://www.starduster.me/2020/03/02/linux-network-tuning-kernel-parameter/
# Ref: https://blog.cloudflare.com/optimizing-tcp-for-high-throughput-and-low-latency/
# Ref: https://zhuanlan.zhihu.com/p/149372947
# 下面两个缓冲区配置目前没有定论说怎么设置是正确的
# 此处为 Cloudflare 在生产中使用的值 (参见前面的博客)
# 有条件建议依据实测结果调整相关数值
# 由左往右依次为 `最小值` `默认值` `最大值`
# 最大值按照机器带宽 (Bps) * RTT (s) 计算
# 如 1Gbps (125 MBps) 的带宽, 40ms 延迟, 就是 125_000_000 * 0.040 = 5000000
net.ipv4.tcp_rmem=8192 262144 5000000
net.ipv4.tcp_wmem=4096 16384 5000000
# 下面这四个不用配置, 和上面两个效果重复了, 会被覆盖
# net.core.wmem_default=1310720
# net.core.rmem_default=1310720
# net.core.rmem_max=536870912
# net.core.wmem_max=536870912
net.ipv4.tcp_adv_win_scale=-2
net.ipv4.tcp_collapse_max_bytes=6291456
net.ipv4.tcp_notsent_lowat=131072
net.core.netdev_max_backlog=10240
net.ipv4.tcp_max_syn_backlog=10240
net.core.somaxconn=3276800
net.ipv4.tcp_abort_on_overflow=1
# 所有网卡每次软中断最多处理的总帧数量
net.core.netdev_budget = 600
# 流控和拥塞控制相关调优
# Egress traffic control 相关. 可选 fq, cake
# 实测二者区别不大, 保持默认 fq 即可
net.core.default_qdisc=fq
# Xanmod 内核 6.X 版本目前默认使用 bbr3, 无需设置
# 实测比 bbr, bbr2 均有提升
# 不过网络条件不同会影响. 有需求请实测.
# net.ipv4.tcp_congestion_control=bbr3
# 显式拥塞通知
# 已被发现在高度拥塞的网络上是有害的.
# net.ipv4.tcp_ecn=1
# TCP 自动窗口
# 要支持超过 64KB 的 TCP 窗口必须启用
net.ipv4.tcp_window_scaling=1
# 开启后, TCP 拥塞窗口会在一个 RTO 时间
# 空闲之后重置为初始拥塞窗口 (CWND) 大小.
# 大部分情况下, 尤其是大流量长连接, 设置为 0.
# 对于网络情况时刻在相对剧烈变化的场景, 设置为 1.
net.ipv4.tcp_slow_start_after_idle=1
# nf_conntrack 调优
# Add Ref: https://gist.github.com/lixingcong/0e13b4123d29a465e364e230b2e45f60
net.nf_conntrack_max=1000000
net.netfilter.nf_conntrack_max=1000000
net.netfilter.nf_conntrack_tcp_timeout_fin_wait=30
net.netfilter.nf_conntrack_tcp_timeout_time_wait=30
net.netfilter.nf_conntrack_tcp_timeout_close_wait=15
net.netfilter.nf_conntrack_tcp_timeout_established=300
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established=7200
# TIME-WAIT 状态调优
# Ref: http://vincent.bernat.im/en/blog/2014-tcp-time-wait-state-linux.html
# Ref: https://www.cnblogs.com/lulu/p/4149312.html
# 4.12 内核中此参数已经永久废弃, 不用纠结是否需要开启
# net.ipv4.tcp_tw_recycle=0
## 只对客户端生效, 服务器连接上游时也认为是客户端
net.ipv4.tcp_tw_reuse=1
# 系统同时保持TIME_WAIT套接字的最大数量
# 如果超过这个数字 TIME_WAIT 套接字将立刻被清除
net.ipv4.tcp_max_tw_buckets=55000
# ------ END 网络调优: 内核 Backlog 队列和缓存相关 ------

# ------ 网络调优: 其他 ------
# Ref: https://zhuanlan.zhihu.com/p/149372947
# Ref: https://www.starduster.me/2020/03/02/linux-network-tuning-kernel-parameter/\#netipv4tcp_max_syn_backlog_netipv4tcp_syncookies
# 启用选择应答
# 对于广域网通信应当启用
net.ipv4.tcp_sack=1
# 启用转发应答
# 对于广域网通信应当启用
net.ipv4.tcp_fack=1
# TCP SYN 连接超时重传次数
net.ipv4.tcp_syn_retries=3
net.ipv4.tcp_synack_retries=3
# TCP SYN 连接超时时间, 设置为 5 约为 30s
net.ipv4.tcp_retries2=5
# 开启 SYN 洪水攻击保护
# 注意: tcp_syncookies 启用时, 此时实际上没有逻辑上的队列长度,
# Backlog 设置将被忽略. syncookie 是一个出于对现实的妥协,
# 严重违反 TCP 协议的设计, 会造成 TCP option 不可用, 且实现上
# 通过计算 hash 避免维护半开连接也是一种 tradeoff 而非万金油,
# 勿听信所谓“安全优化教程”而无脑开启
net.ipv4.tcp_syncookies=0

# Ref: https://linuxgeeks.github.io/2017/03/20/212135-Linux%E5%86%85%E6%A0%B8%E5%8F%82%E6%95%B0rp_filter/
# 开启反向路径过滤
# Aliyun 负载均衡实例后端的 ECS 需要设置为 0
net.ipv4.conf.default.rp_filter=2
net.ipv4.conf.all.rp_filter=2

# 减少处于 FIN-WAIT-2 连接状态的时间使系统可以处理更多的连接
# Ref: https://www.cnblogs.com/kaishirenshi/p/11544874.html
net.ipv4.tcp_fin_timeout=10

# Ref: https://xwl-note.readthedocs.io/en/latest/linux/tuning.html
# 默认情况下一个 TCP 连接关闭后, 把这个连接曾经有的参数保存到dst_entry中
# 只要 dst_entry 没有失效, 下次新建立相同连接的时候就可以使用保存的参数来初始化这个连接.
# 通常情况下是关闭的, 高并发配置为 1.
net.ipv4.tcp_no_metrics_save=1
# unix socket 最大队列
net.unix.max_dgram_qlen=1024
# 路由缓存刷新频率
net.ipv4.route.gc_timeout=100

# Ref: https://gist.github.com/lixingcong/0e13b4123d29a465e364e230b2e45f60
# 启用 MTU 探测，在链路上存在 ICMP 黑洞时候有用（大多数情况是这样）
net.ipv4.tcp_mtu_probing = 1

# No Ref
# 开启并记录欺骗, 源路由和重定向包
net.ipv4.conf.all.log_martians=1
net.ipv4.conf.default.log_martians=1
# 处理无源路由的包
net.ipv4.conf.all.accept_source_route=0
net.ipv4.conf.default.accept_source_route=0
# TCP KeepAlive 调优
# 最大闲置时间
net.ipv4.tcp_keepalive_time=600
# 最大失败次数, 超过此值后将通知应用层连接失效
net.ipv4.tcp_keepalive_probes=3
# 发送探测包的时间间隔
net.ipv4.tcp_keepalive_intvl=15
# 放弃回应一个 TCP 连接请求前, 需要进行多少次重试
net.ipv4.tcp_retries1 = 5
# 在丢弃激活(已建立通讯状况)的 TCP 连接之前, 需要进行多少次重试
net.ipv4.tcp_retries2 = 5
# 孤立 Socket
net.ipv4.tcp_orphan_retries = 3
# 系统所能处理不属于任何进程的TCP sockets最大数量
net.ipv4.tcp_max_orphans=3276800
# arp_table的缓存限制优化
net.ipv4.neigh.default.gc_thresh1=128
net.ipv4.neigh.default.gc_thresh2=512
net.ipv4.neigh.default.gc_thresh3=4096
net.ipv4.neigh.default.gc_stale_time=120
net.ipv4.conf.default.arp_announce=2
net.ipv4.conf.lo.arp_announce=2
net.ipv4.conf.all.arp_announce=2
# ------ END 网络调优: 其他 ------

# ------ 内核调优 ------

# Ref: Aliyun, etc
# 内核 Panic 后 1 秒自动重启
kernel.panic=1
# 允许更多的PIDs, 减少滚动翻转问题
kernel.pid_max=32768
# 内核所允许的最大共享内存段的大小（bytes）
kernel.shmmax=4294967296
# 在任何给定时刻, 系统上可以使用的共享内存的总量（pages）
kernel.shmall=1073741824
# 设定程序core时生成的文件名格式
kernel.core_pattern=core_%e
# 当发生oom时, 自动转换为panic
vm.panic_on_oom=1
# 表示强制Linux VM最低保留多少空闲内存（Kbytes）
# vm.min_free_kbytes=1048576
# 该值高于100, 则将导致内核倾向于回收directory和inode cache
vm.vfs_cache_pressure=250
# 表示系统进行交换行为的程度, 数值（0-100）越高, 越可能发生磁盘交换
vm.swappiness=10
# 仅用10%做为系统cache
vm.dirty_ratio=10
vm.overcommit_memory=1
# 增加系统文件描述符限制
# Fix error: too many open files
fs.file-max=6553560
fs.inotify.max_user_instances=8192
fs.inotify.max_user_instances=8192
# 内核响应魔术键
kernel.sysrq=1
# 弃用
# net.ipv4.tcp_low_latency=1

# Ref: https://gist.github.com/lixingcong/0e13b4123d29a465e364e230b2e45f60
# 当某个节点可用内存不足时, 系统会倾向于从其他节点分配内存. 对 Mongo/Redis 类 cache 服务器友好
vm.zone_reclaim_mode=0

# Ref: Unknwon
# 开启F-RTO(针对TCP重传超时的增强的恢复算法).
# 在无线环境下特别有益处, 因为在这种环境下分组丢失典型地是因为随机无线电干扰而不是中间路由器阻塞
net.ipv4.tcp_frto = 2
# TCP FastOpen
net.ipv4.tcp_fastopen = 3
# TCP 流中重排序的数据报最大数量
net.ipv4.tcp_reordering = 300
# 开启后, 在重传时会试图发送满大小的包. 这是对一些有 BUG 的打印机的绕过方式
net.ipv4.tcp_retrans_collapse = 0
# 自动阻塞判断
net.ipv4.tcp_autocorking = 1
# TCP内存自动调整
net.ipv4.tcp_moderate_rcvbuf = 1
# 单个TSO段可消耗拥塞窗口的比例, 默认值为 3
net.ipv4.tcp_tso_win_divisor = 3
# 对于在 RFC1337 中描述的 TIME-WAIT Assassination Hazards in TCP 问题的修复
net.ipv4.tcp_rfc1337 = 1
# 包转发. 出于安全考虑, Linux 系统默认禁止数据包转发
net.ipv4.ip_forward = 0
# 取消对广播 ICMP 包的回应
net.ipv4.icmp_echo_ignore_broadcasts = 1
# 开启恶意 ICMP 错误消息保护
net.ipv4.icmp_ignore_bogus_error_responses = 1

TEXT

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cat <<'TEXT' > /etc/security/limits.conf
* soft nofile 65535
* hard nofile 65535
* soft nproc 65535
* hard nproc 65535
root soft nofile 65535
root hard nofile 65535
root soft nproc 65535
root hard nproc 65535
TEXT

cat <<'TEXT' > /etc/security/limits.d/90-nproc.conf
* soft nproc 65535
root soft nproc 65535
TEXT

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cat <<'EOF' > /etc/systemd/journald.conf
[Journal]
#Storage=auto
#Compress=yes
#Seal=yes
#SplitMode=uid
#SyncIntervalSec=5m
#RateLimitIntervalSec=30s
#RateLimitBurst=10000
# Limit total persist storage
SystemMaxUse=512M
# Limit single file persist storage
SystemMaxFileSize=128M
#SystemMaxFiles=100
# Limit RAM usage
RuntimeMaxUse=64M
#RuntimeKeepFree=
#RuntimeMaxFileSize=
#RuntimeMaxFiles=100
#MaxRetentionSec=
#MaxFileSec=1month
# Stop forward to Syslog
ForwardToSyslog=no
#ForwardToKMsg=no
#ForwardToConsole=no
#ForwardToWall=yes
#TTYPath=/dev/console
#MaxLevelStore=debug
#MaxLevelSyslog=debug
#MaxLevelKMsg=notice
#MaxLevelConsole=info
#MaxLevelWall=emerg
#LineMax=48K
#ReadKMsg=yes
#Audit=no
EOF

systemctl restart systemd-journald

# Install rsyslog if not exist
apt install rsyslog
systemctl enable rsyslog --now

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apt update

# 忘了时区代码可以列一下
# timedatectl list-timezones
# 设置时区, 此处以中国香港为例, 中国大陆就是 `Asia/Shanghai`
timedatectl set-timezone Asia/Hong_Kong

apt purge ntp
apt install systemd-timesyncd

cat <<'EOF' > /etc/systemd/timesyncd.conf
[Time]
# 主 NTP 服务器
# 中国大陆, 使用国家授时中心官方 NTP, 海外的用 Cloudflare 的很不错, 改成 `time.cloudflare.com`
NTP=ntp.ntsc.ac.cn

# 备份 NTP 服务器
FallbackNTP=pool.ntp.org time1.google.com time1.apple.com time.cloudflare.com time.windows.com time.nist.gov

# 同步配置
RootDistanceMaxSec=5
PollIntervalMinSec=5
PollIntervalMaxSec=300
ConnectionRetrySec=30
SaveIntervalSec=60
EOF

systemctl enable --now systemd-timesyncd

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apt update && apt install netplan.io

# Backup original one
mv /etc/network/interfaces /etc/network/interfaces.bak

cat <<'TEXT' > /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback
TEXT

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cat <<'TEXT' > /etc/netplan/50-static.yaml
network:
    version: 2
    ethernets:
        {eth_name}:
            addresses:
            - {v4}
            - {v6}
            routes:
            - to: default
              via: {v4_gateway}
              on-link: true
            - to: default
              via: {v6_gateway}
              on-link: true
            match:
                macaddress: {macaddress}
            nameservers:
                addresses:
                - 1.1.1.1
                - 1.0.0.1
                - 2606:4700:4700::1001
                - 2606:4700:4700::1111
            set-name: {eth_name}
TEXT

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cat <<'TEXT' > /etc/netplan/99-dhcp.yaml
network:
    version: 2
    ethernets:
        all-en:
            match:
                name: "en*"
            dhcp4: true
            dhcp6: true
            ipv6-privacy: true
            accept-ra: true
TEXT

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# try configurating network, ENTER to comfirm
netplan try

# Check if netplan managed
networkctl