00-disable-password.sh 改名为 00-password.sh
This commit is contained in:
eddy
487
init/00-password.sh
Normal file
487
init/00-password.sh
Normal file
@@ -0,0 +1,487 @@
|
||||
#!/bin/bash
|
||||
# 用法:
|
||||
# 启用安全模式: ./00-password.sh enable
|
||||
# 关闭安全模式: ./00-password.sh disable
|
||||
# 查看状态: ./00-password.sh status
|
||||
#
|
||||
# curl -sS -O https://gitea.tohub.top/Share/vps/raw/branch/main/init/00-password.sh && chmod +x 00-password.sh
|
||||
|
||||
set -e # 遇到错误立即退出
|
||||
|
||||
# 颜色输出
|
||||
RED='\033[0;31m'
|
||||
GREEN='\033[0;32m'
|
||||
YELLOW='\033[1;33m'
|
||||
BLUE='\033[0;34m'
|
||||
NC='\033[0m' # No Color
|
||||
|
||||
# 日志函数
|
||||
log_info() {
|
||||
echo -e "${GREEN}[INFO]${NC} $1"
|
||||
}
|
||||
|
||||
log_warn() {
|
||||
echo -e "${YELLOW}[WARN]${NC} $1"
|
||||
}
|
||||
|
||||
log_error() {
|
||||
echo -e "${RED}[ERROR]${NC} $1"
|
||||
}
|
||||
|
||||
log_status() {
|
||||
echo -e "${BLUE}[STATUS]${NC} $1"
|
||||
}
|
||||
|
||||
# 用户设置
|
||||
NEW_SSH_PORT="4399" # 根据需求修改端口
|
||||
DEFAULT_SSH_PORT="22"
|
||||
BACKUP_DIR="/root/ssh_backup_$(date +%Y%m%d_%H%M%S)"
|
||||
PERSISTENT_BACKUP_DIR="/root/ssh_config_backup"
|
||||
|
||||
# 检查是否为root用户
|
||||
if [ "$EUID" -ne 0 ]; then
|
||||
log_error "请使用 root 用户运行此脚本"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# 显示使用帮助
|
||||
show_usage() {
|
||||
echo "用法: $0 {enable|disable|status}"
|
||||
echo ""
|
||||
echo "命令:"
|
||||
echo " enable - 启用 SSH 安全模式（禁用密码登录，使用密钥认证）"
|
||||
echo " disable - 关闭 SSH 安全模式（恢复密码登录）"
|
||||
echo " status - 查看当前 SSH 配置状态"
|
||||
echo ""
|
||||
echo "示例:"
|
||||
echo " $0 enable # 启用安全模式"
|
||||
echo " $0 disable # 关闭安全模式"
|
||||
echo " $0 status # 查看状态"
|
||||
exit 1
|
||||
}
|
||||
|
||||
# 获取当前SSH配置状态
|
||||
get_ssh_config_value() {
|
||||
local key=$1
|
||||
local config_file="/etc/ssh/sshd_config"
|
||||
|
||||
# 获取配置值（忽略注释行）
|
||||
grep "^${key}" "$config_file" 2>/dev/null | awk '{print $2}' | head -n1
|
||||
}
|
||||
|
||||
# 检查当前状态
|
||||
check_current_status() {
|
||||
local port=$(get_ssh_config_value "Port")
|
||||
local password_auth=$(get_ssh_config_value "PasswordAuthentication")
|
||||
local pubkey_auth=$(get_ssh_config_value "PubkeyAuthentication")
|
||||
local permit_root=$(get_ssh_config_value "PermitRootLogin")
|
||||
|
||||
# 默认值
|
||||
port=${port:-22}
|
||||
password_auth=${password_auth:-yes}
|
||||
pubkey_auth=${pubkey_auth:-yes}
|
||||
permit_root=${permit_root:-yes}
|
||||
|
||||
echo "当前 SSH 配置状态:"
|
||||
echo "----------------------------------------"
|
||||
echo " SSH 端口: $port"
|
||||
echo " 密码认证: $password_auth"
|
||||
echo " 公钥认证: $pubkey_auth"
|
||||
echo " Root登录: $permit_root"
|
||||
echo "----------------------------------------"
|
||||
|
||||
# 判断是否为安全模式
|
||||
if [[ "$password_auth" == "no" ]] && [[ "$pubkey_auth" == "yes" ]]; then
|
||||
log_status "当前处于【安全模式】- 密码登录已禁用"
|
||||
return 0 # 安全模式
|
||||
else
|
||||
log_status "当前处于【普通模式】- 密码登录已启用"
|
||||
return 1 # 普通模式
|
||||
fi
|
||||
}
|
||||
|
||||
# 显示状态
|
||||
show_status() {
|
||||
log_info "正在检查 SSH 配置状态..."
|
||||
echo ""
|
||||
check_current_status
|
||||
|
||||
# 检查是否有备份
|
||||
if [ -d "$PERSISTENT_BACKUP_DIR" ] && [ -f "$PERSISTENT_BACKUP_DIR/sshd_config.original" ]; then
|
||||
echo ""
|
||||
log_info "找到配置备份: $PERSISTENT_BACKUP_DIR"
|
||||
fi
|
||||
}
|
||||
|
||||
# 创建持久化备份
|
||||
create_persistent_backup() {
|
||||
if [ ! -d "$PERSISTENT_BACKUP_DIR" ]; then
|
||||
mkdir -p "$PERSISTENT_BACKUP_DIR"
|
||||
cp /etc/ssh/sshd_config "$PERSISTENT_BACKUP_DIR/sshd_config.original"
|
||||
log_info "已创建原始配置备份: $PERSISTENT_BACKUP_DIR/sshd_config.original"
|
||||
else
|
||||
log_info "使用现有配置备份: $PERSISTENT_BACKUP_DIR"
|
||||
fi
|
||||
}
|
||||
|
||||
# 1. 检查公钥是否存在
|
||||
check_ssh_keys() {
|
||||
log_info "检查 SSH 公钥..."
|
||||
|
||||
if [ ! -f ~/.ssh/authorized_keys ] || [ ! -s ~/.ssh/authorized_keys ]; then
|
||||
log_error "未找到 SSH 公钥文件或文件为空！"
|
||||
log_error "路径: ~/.ssh/authorized_keys"
|
||||
echo ""
|
||||
log_warn "如果继续，您将无法通过 SSH 登录服务器！"
|
||||
read -p "是否要继续？(输入 YES 继续): " confirm
|
||||
if [ "$confirm" != "YES" ]; then
|
||||
log_info "操作已取消"
|
||||
exit 0
|
||||
fi
|
||||
else
|
||||
log_info "找到 SSH 公钥，密钥数量: $(grep -c "^ssh-" ~/.ssh/authorized_keys || echo 0)"
|
||||
echo "密钥内容预览:"
|
||||
head -n 2 ~/.ssh/authorized_keys
|
||||
fi
|
||||
}
|
||||
|
||||
# 2. 检查端口是否被占用
|
||||
check_port() {
|
||||
local port=$1
|
||||
log_info "检查端口 $port 是否可用..."
|
||||
|
||||
if ss -tlnp 2>/dev/null | grep -q ":$port " || netstat -tlnp 2>/dev/null | grep -q ":$port "; then
|
||||
# 检查是否是SSH服务占用
|
||||
if ss -tlnp 2>/dev/null | grep ":$port " | grep -q "sshd" || netstat -tlnp 2>/dev/null | grep ":$port " | grep -q "sshd"; then
|
||||
log_info "端口 $port 已被 SSH 服务占用（正常）"
|
||||
else
|
||||
log_error "端口 $port 已被其他服务占用！"
|
||||
ss -tlnp 2>/dev/null | grep ":$port " || netstat -tlnp 2>/dev/null | grep ":$port "
|
||||
exit 1
|
||||
fi
|
||||
else
|
||||
log_info "端口 $port 可用"
|
||||
fi
|
||||
}
|
||||
|
||||
# 3. 修改SSH配置
|
||||
modify_ssh_config() {
|
||||
local mode=$1 # enable 或 disable
|
||||
log_info "开始配置 SSH..."
|
||||
|
||||
# 创建临时备份目录
|
||||
mkdir -p "$BACKUP_DIR"
|
||||
|
||||
# 备份原始配置
|
||||
cp /etc/ssh/sshd_config "$BACKUP_DIR/sshd_config.bak"
|
||||
log_info "已备份 SSH 配置到: $BACKUP_DIR/sshd_config.bak"
|
||||
|
||||
# 创建新配置
|
||||
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.tmp
|
||||
|
||||
if [ "$mode" == "enable" ]; then
|
||||
log_info "配置安全模式..."
|
||||
|
||||
# 1. 禁止 root 密码登录，但允许密钥登录
|
||||
if grep -q "^PermitRootLogin" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PermitRootLogin.*/PermitRootLogin prohibit-password/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PermitRootLogin.*/PermitRootLogin prohibit-password/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 2. 禁用密码认证
|
||||
if grep -q "^PasswordAuthentication" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PasswordAuthentication.*/PasswordAuthentication no/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 3. 启用公钥认证
|
||||
if grep -q "^PubkeyAuthentication" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PubkeyAuthentication.*/PubkeyAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PubkeyAuthentication.*/PubkeyAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 4. 修改端口
|
||||
if grep -q "^Port " /etc/ssh/sshd_config.tmp; then
|
||||
sed -i "s/^Port [0-9]\+/Port $NEW_SSH_PORT/" /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i "s/^#Port 22/Port $NEW_SSH_PORT/" /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 5. 额外的安全加固
|
||||
# 禁用空密码
|
||||
if grep -q "^PermitEmptyPasswords" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PermitEmptyPasswords.*/PermitEmptyPasswords no/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PermitEmptyPasswords.*/PermitEmptyPasswords no/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 禁用质询响应认证
|
||||
if grep -q "^ChallengeResponseAuthentication" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^ChallengeResponseAuthentication.*/ChallengeResponseAuthentication no/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
elif [ "$mode" == "disable" ]; then
|
||||
log_info "配置普通模式（允许密码登录）..."
|
||||
|
||||
# 如果有原始备份，直接恢复
|
||||
if [ -f "$PERSISTENT_BACKUP_DIR/sshd_config.original" ]; then
|
||||
log_info "从原始备份恢复配置..."
|
||||
cp "$PERSISTENT_BACKUP_DIR/sshd_config.original" /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
# 手动修改为允许密码登录
|
||||
log_info "手动修改配置..."
|
||||
|
||||
# 1. 允许 root 密码登录
|
||||
if grep -q "^PermitRootLogin" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PermitRootLogin.*/PermitRootLogin yes/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 2. 启用密码认证
|
||||
if grep -q "^PasswordAuthentication" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PasswordAuthentication.*/PasswordAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 3. 启用公钥认证（保持）
|
||||
if grep -q "^PubkeyAuthentication" /etc/ssh/sshd_config.tmp; then
|
||||
sed -i 's/^PubkeyAuthentication.*/PubkeyAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
else
|
||||
sed -i 's/^#PubkeyAuthentication.*/PubkeyAuthentication yes/' /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
|
||||
# 4. 恢复默认端口
|
||||
if grep -q "^Port " /etc/ssh/sshd_config.tmp; then
|
||||
sed -i "s/^Port [0-9]\+/Port $DEFAULT_SSH_PORT/" /etc/ssh/sshd_config.tmp
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
|
||||
# 验证配置文件语法
|
||||
log_info "验证 SSH 配置文件语法..."
|
||||
if sshd -t -f /etc/ssh/sshd_config.tmp; then
|
||||
log_info "SSH 配置文件语法正确"
|
||||
mv /etc/ssh/sshd_config.tmp /etc/ssh/sshd_config
|
||||
else
|
||||
log_error "SSH 配置文件语法错误！"
|
||||
rm /etc/ssh/sshd_config.tmp
|
||||
exit 1
|
||||
fi
|
||||
}
|
||||
|
||||
# 4. 重启 SSH 服务（兼容多种系统）
|
||||
restart_ssh() {
|
||||
log_info "重启 SSH 服务..."
|
||||
|
||||
# 保持当前连接
|
||||
log_warn "注意: SSH 服务将重启，但当前连接会保持"
|
||||
|
||||
if command -v systemctl &> /dev/null; then
|
||||
systemctl restart sshd || systemctl restart ssh
|
||||
log_info "SSH 服务已通过 systemctl 重启"
|
||||
elif command -v service &> /dev/null; then
|
||||
service sshd restart || service ssh restart
|
||||
log_info "SSH 服务已通过 service 重启"
|
||||
else
|
||||
/etc/init.d/sshd restart || /etc/init.d/ssh restart
|
||||
log_info "SSH 服务已通过 init.d 重启"
|
||||
fi
|
||||
}
|
||||
|
||||
# 5. 配置防火墙（启用模式）
|
||||
configure_firewall_enable() {
|
||||
log_info "配置防火墙..."
|
||||
|
||||
# 检查系统并安装 UFW
|
||||
if ! command -v ufw &> /dev/null; then
|
||||
log_info "安装 UFW 防火墙..."
|
||||
apt-get update -y && apt-get install -y ufw
|
||||
fi
|
||||
|
||||
# 备份当前防火墙规则
|
||||
mkdir -p "$BACKUP_DIR"
|
||||
ufw status numbered > "$BACKUP_DIR/ufw_rules.bak" 2>/dev/null || true
|
||||
|
||||
# 配置防火墙规则
|
||||
log_info "设置防火墙规则..."
|
||||
|
||||
# 先允许新端口，避免锁死
|
||||
ufw allow $NEW_SSH_PORT/tcp comment "SSH"
|
||||
|
||||
# 询问是否允许其他常用端口
|
||||
read -p "是否允许 HTTP (80) 和 HTTPS (443) 端口? (y/n): " allow_web
|
||||
if [[ $allow_web =~ ^[Yy]$ ]]; then
|
||||
ufw allow 80/tcp comment "HTTP"
|
||||
ufw allow 443/tcp comment "HTTPS"
|
||||
log_info "已允许 HTTP 和 HTTPS 端口"
|
||||
fi
|
||||
|
||||
# 启用防火墙
|
||||
ufw --force enable
|
||||
|
||||
log_info "防火墙状态:"
|
||||
ufw status verbose
|
||||
}
|
||||
|
||||
# 6. 配置防火墙（禁用模式）
|
||||
configure_firewall_disable() {
|
||||
log_info "恢复防火墙配置..."
|
||||
|
||||
if ! command -v ufw &> /dev/null; then
|
||||
log_info "未安装 UFW，跳过防火墙配置"
|
||||
return
|
||||
fi
|
||||
|
||||
# 允许默认SSH端口
|
||||
ufw allow $DEFAULT_SSH_PORT/tcp comment "SSH"
|
||||
log_info "已允许默认 SSH 端口 $DEFAULT_SSH_PORT"
|
||||
|
||||
# 询问是否删除自定义端口规则
|
||||
read -p "是否删除自定义 SSH 端口 $NEW_SSH_PORT 的防火墙规则? (y/n): " remove_port
|
||||
if [[ $remove_port =~ ^[Yy]$ ]]; then
|
||||
ufw delete allow $NEW_SSH_PORT/tcp 2>/dev/null || true
|
||||
log_info "已删除端口 $NEW_SSH_PORT 的防火墙规则"
|
||||
fi
|
||||
|
||||
ufw status verbose
|
||||
}
|
||||
|
||||
# 启用安全模式
|
||||
enable_security() {
|
||||
log_info "=== 启用 SSH 安全模式 ==="
|
||||
echo ""
|
||||
|
||||
# 检查当前状态
|
||||
if check_current_status > /dev/null 2>&1; then
|
||||
log_warn "SSH 已经处于安全模式"
|
||||
read -p "是否要重新配置? (y/n): " reconfig
|
||||
if [[ ! $reconfig =~ ^[Yy]$ ]]; then
|
||||
log_info "操作已取消"
|
||||
exit 0
|
||||
fi
|
||||
fi
|
||||
|
||||
# 显示当前配置
|
||||
log_info "当前 SSH 配置:"
|
||||
echo " - 当前端口: $(get_ssh_config_value "Port" || echo "22 (默认)")"
|
||||
echo " - 将修改为: $NEW_SSH_PORT"
|
||||
echo ""
|
||||
|
||||
# 确认执行
|
||||
read -p "是否继续执行? (y/n): " confirm
|
||||
if [[ ! $confirm =~ ^[Yy]$ ]]; then
|
||||
log_info "操作已取消"
|
||||
exit 0
|
||||
fi
|
||||
|
||||
# 创建持久化备份
|
||||
create_persistent_backup
|
||||
|
||||
# 执行配置
|
||||
check_ssh_keys
|
||||
check_port "$NEW_SSH_PORT"
|
||||
modify_ssh_config "enable"
|
||||
restart_ssh
|
||||
configure_firewall_enable
|
||||
|
||||
# 显示完成信息
|
||||
echo ""
|
||||
echo "========================================"
|
||||
log_info "SSH 安全模式已启用！"
|
||||
echo "========================================"
|
||||
echo ""
|
||||
echo "修改后的配置:"
|
||||
echo " - SSH 端口: $NEW_SSH_PORT"
|
||||
echo " - 密码登录: 已禁用"
|
||||
echo " - 密钥登录: 已启用"
|
||||
echo " - Root 密码登录: 已禁用"
|
||||
echo ""
|
||||
echo "备份信息:"
|
||||
echo " - 临时备份: $BACKUP_DIR"
|
||||
echo " - 永久备份: $PERSISTENT_BACKUP_DIR"
|
||||
echo ""
|
||||
echo "重要提示:"
|
||||
echo " 1. 请勿关闭当前 SSH 连接"
|
||||
echo " 2. 在新终端测试登录: ssh -p $NEW_SSH_PORT root@your_server_ip"
|
||||
echo " 3. 确认新连接成功后再关闭此窗口"
|
||||
echo " 4. 如需恢复，运行: $0 disable"
|
||||
echo ""
|
||||
echo "========================================"
|
||||
}
|
||||
|
||||
# 关闭安全模式
|
||||
disable_security() {
|
||||
log_info "=== 关闭 SSH 安全模式 ==="
|
||||
echo ""
|
||||
|
||||
# 检查当前状态
|
||||
if ! check_current_status > /dev/null 2>&1; then
|
||||
log_warn "SSH 已经处于普通模式"
|
||||
read -p "是否要重新配置? (y/n): " reconfig
|
||||
if [[ ! $reconfig =~ ^[Yy]$ ]]; then
|
||||
log_info "操作已取消"
|
||||
exit 0
|
||||
fi
|
||||
fi
|
||||
|
||||
# 警告
|
||||
log_warn "警告: 此操作将允许密码登录，安全性会降低！"
|
||||
read -p "确认要关闭安全模式吗? (输入 YES 继续): " confirm
|
||||
if [ "$confirm" != "YES" ]; then
|
||||
log_info "操作已取消"
|
||||
exit 0
|
||||
fi
|
||||
|
||||
# 执行配置
|
||||
check_port "$DEFAULT_SSH_PORT"
|
||||
modify_ssh_config "disable"
|
||||
restart_ssh
|
||||
configure_firewall_disable
|
||||
|
||||
# 显示完成信息
|
||||
echo ""
|
||||
echo "========================================"
|
||||
log_info "SSH 安全模式已关闭！"
|
||||
echo "========================================"
|
||||
echo ""
|
||||
echo "修改后的配置:"
|
||||
echo " - SSH 端口: $DEFAULT_SSH_PORT"
|
||||
echo " - 密码登录: 已启用"
|
||||
echo " - 密钥登录: 已启用"
|
||||
echo ""
|
||||
echo "重要提示:"
|
||||
echo " 1. 请勿关闭当前 SSH 连接"
|
||||
echo " 2. 在新终端测试登录: ssh -p $DEFAULT_SSH_PORT root@your_server_ip"
|
||||
echo " 3. 确认新连接成功后再关闭此窗口"
|
||||
echo " 4. 如需重新启用安全模式，运行: $0 enable"
|
||||
echo ""
|
||||
echo "========================================"
|
||||
}
|
||||
|
||||
# 主流程
|
||||
main() {
|
||||
local action=${1:-}
|
||||
|
||||
case "$action" in
|
||||
enable)
|
||||
enable_security
|
||||
;;
|
||||
disable)
|
||||
disable_security
|
||||
;;
|
||||
status)
|
||||
show_status
|
||||
;;
|
||||
*)
|
||||
show_usage
|
||||
;;
|
||||
esac
|
||||
}
|
||||
|
||||
# 执行主函数
|
||||
main "$@"
|
||||
Reference in New Issue
Block a user