diff --git a/internal/handler/agent_install_handler.go b/internal/handler/agent_install_handler.go
index 021e796..d9ddab5 100644
--- a/internal/handler/agent_install_handler.go
+++ b/internal/handler/agent_install_handler.go
@@ -27,7 +27,7 @@ func (h *AgentHandler) DownloadAgent(c echo.Context) error {
 	if _, err := h.apiKeyService.ValidateApiKey(c.Request().Context(), apiKey); err != nil {
 		// API Key 校验失败，尝试 IP 白名单兜底（兼容旧版 Agent 自动更新）
 		clientIP := c.RealIP()
-		isOnline, checkErr := h.agentService.IsAgentOnlineByIP(c.Request().Context(), clientIP)
+		isOnline, checkErr := h.agentService.IsAgentByIP(c.Request().Context(), clientIP)
 		if checkErr != nil {
 			h.logger.Error("check agent online by ip failed", zap.String("ip", clientIP), zap.Error(checkErr))
 			return orz.NewError(500, "系统内部错误")
diff --git a/internal/models/agent.go b/internal/models/agent.go
index e1539d3..b2c7def 100644
--- a/internal/models/agent.go
+++ b/internal/models/agent.go
@@ -12,6 +12,7 @@ type Agent struct {
 	ID         string                      `gorm:"primaryKey" json:"id"`                  // 探针ID (UUID)
 	Name       string                      `gorm:"index" json:"name"`                     // 探针名称
 	Hostname   string                      `gorm:"index" json:"hostname,omitempty"`       // 主机名
+	IP         string                      `gorm:"index" json:"ip,omitempty"`             // 连接 IP 地址
 	IPv4       string                      `gorm:"index" json:"ipv4,omitempty"`           // 公网 IPv4 地址
 	IPv6       string                      `gorm:"index" json:"ipv6,omitempty"`           // 公网 IPv6 地址
 	OS         string                      `json:"os"`                                    // 操作系统
diff --git a/internal/repo/agent_repo.go b/internal/repo/agent_repo.go
index 6ad3a61..d227b9d 100644
--- a/internal/repo/agent_repo.go
+++ b/internal/repo/agent_repo.go
@@ -48,7 +48,7 @@ func (r *AgentRepo) FindOnlineAgents(ctx context.Context) ([]models.Agent, error
 func (r *AgentRepo) FindByIP(ctx context.Context, ip string) (*models.Agent, error) {
 	var agent models.Agent
 	err := r.db.WithContext(ctx).
-		Where("ipv4 = ? OR ipv6 = ?", ip, ip).
+		Where("ip = ? or ipv4 = ? OR ipv6 = ?", ip, ip).
 		First(&agent).Error
 	if err != nil {
 		return nil, err
diff --git a/internal/service/agent_service.go b/internal/service/agent_service.go
index 8cab90a..e8be6bf 100644
--- a/internal/service/agent_service.go
+++ b/internal/service/agent_service.go
@@ -63,6 +63,7 @@ func (s *AgentService) RegisterAgent(ctx context.Context, ip string, info *proto
 		// 更新现有探针信息（允许主机名、名称等变化）
 		now := time.Now().UnixMilli()
 		existingAgent.Hostname = info.Hostname
+		existingAgent.IP = ip
 		existingAgent.OS = info.OS
 		existingAgent.Arch = info.Arch
 		existingAgent.Version = info.Version
@@ -88,6 +89,7 @@ func (s *AgentService) RegisterAgent(ctx context.Context, ip string, info *proto
 		ID:         info.ID, // 使用客户端持久化的 ID
 		Name:       info.Name,
 		Hostname:   info.Hostname,
+		IP:         ip,
 		OS:         info.OS,
 		Arch:       info.Arch,
 		Version:    info.Version,
@@ -151,18 +153,16 @@ func (s *AgentService) ListOnlineAgents(ctx context.Context) ([]models.Agent, er
 	return s.AgentRepo.FindOnlineAgents(ctx)
 }
 
-// IsAgentOnlineByIP 检查指定公网IP是否存在在线的探针
-func (s *AgentService) IsAgentOnlineByIP(ctx context.Context, ip string) (bool, error) {
-	agent, err := s.AgentRepo.FindByIP(ctx, ip)
+// IsAgentByIP 检查指定公网IP是否为探针
+func (s *AgentService) IsAgentByIP(ctx context.Context, ip string) (bool, error) {
+	_, err := s.AgentRepo.FindByIP(ctx, ip)
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return false, nil
 		}
 		return false, err
 	}
-
-	// 状态 1 表示在线
-	return agent.Status == 1, nil
+	return true, nil
 }
 
 // HandleCommandResponse 处理指令响应