Thực hiện tạo Custome HTTP Signature

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Bùi Nguyễn Hoàng Long
VnPro

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Lab 10: Thực hiện tạo Custome HTTP Signature



http://img11.imageshack.us/img11/6640/image001sa.gif

I. Mô tả:
Tạo một Signature tùy chọn để kiểm tra sự vi phạm khi một gói HTTP có chứa từ “attack” trong URI.
Khi vi phạm xảy ra hành động là Produce Alert và Deny Attacker Service Pair Inline
II. Cấu hình
Đảm bảo cổng Monitoring được Enable và gán vào Virtual Sensor

http://img221.imageshack.us/img221/2825/image002fu.jpg

Trong Signature Definitions chọn Custom Signature Wizard để thực hiện tạo mới Signature

http://img706.imageshack.us/img706/4899/image003wg.jpg

Chọn Signature Engine mà Custom Signature thuộc

http://img41.imageshack.us/img41/6369/image004kp.jpg



Định nghĩa Custom Signature với Signature ID và Signature Name

http://img695.imageshack.us/img695/6159/image005pt.jpg

Xác định tham số cho Custom Signature

http://img191.imageshack.us/img191/4322/image006di.jpg

Xác định mức độ tin cậy và mức độ ảnh hưởng của Custom Signature

http://img546.imageshack.us/img546/7820/image007gp.jpg

Chọn Advanced, để tùy chỉnh những tham số cảnh báo



http://img829.imageshack.us/img829/8641/image008gl.jpg


Xác định Event Count và Event Interval (có ý nghĩa khi giá trị Event Count lớn hơn 1)



http://img231.imageshack.us/img231/6049/image009ck.jpg


Cảnh báo sẽ được tạo tương ứng với mỗi sự vi phạm xảy ra



http://img812.imageshack.us/img812/6115/image010x.jpg


Chọn Finish để kết thúc quá trình định nghĩa Custom Signature


http://img843.imageshack.us/img843/8539/image011zz.jpg


Chọn Yes để thực hiện tạo Custom Signature



http://img5.imageshack.us/img5/5361/image012ky.jpg


Custom Signature sau khi được tạo

http://img155.imageshack.us/img155/169/image013ke.jpg
http://img52.imageshack.us/img52/1323/image014ps.jpg

Thực hiện kiểm tra họat động của Custom Signature



http://img695.imageshack.us/img695/9996/image015pr.jpg



http://img42.imageshack.us/img42/3387/image016fr.jpg


Cảnh báo được tạo tương ứng với sự vi phạm



http://img190.imageshack.us/img190/5061/image017yh.jpg


Thông tin chi tiết của cảnh báo



http://img339.imageshack.us/img339/5936/image018vl.jpg


Danh sách địa chỉ và dịch vụ bị Deny

http://img69.imageshack.us/img69/159/image019pv.jpg

Cho đến khi khoảng thời gian thời gian bị Deny phụ thuộc vào giá trị được xác định trong Deny Attacker Duration

http://img696.imageshack.us/img696/7112/image020dh.jpg