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            ǰλãeNetȶ > ѧԺƵ > ڿ  



            IPƬ 
            2004-08-02 09:05 ߣSinbadʹ ԴeNet̳ 



                         顿
                        ļ򵥽IPƬԭSnortץϸIPƬԭֹIPƬһЩ顣ϣԼIPЭһЩDoSֶ 


                    ղء Ϊҳ 









                        4. jolt2 

                        jolt2.cһѭвͣķһICMP/UDPIPƬʹWindowsϵͳĻҲûSPWindows 
                        2000CPUʻ100%޷ƶ 

                        SnortֱץȡICMPUDPЭ鷢͵ݰ 

                        ͵ICMP 

                        01/07-15:33:26.974096 192.168.0.9 -> 192.168.0.1 

                        ICMP TTL:255 TOS:0x0 ID:1109 IpLen:20 DgmLen:29 

                        Frag Offset: 0x1FFE Frag Size: 0x9 

                        08 00 00 00 00 00 00 00 00 ......... 

                        ͵UDP 

                        01/10-14:21:00.298282 192.168.0.9 -> 192.168.0.1 

                        UDP TTL:255 TOS:0x0 ID:1109 IpLen:20 DgmLen:29 

                        Frag Offset: 0x1FFE Frag Size: 0x9 

                        04 D3 04 D2 00 09 00 00 61 ........a 

                        ĽԿ 

                        * Ƭ־λMF=0˵һƬ 

                        * ƫΪ0x1FFEĳΪ (0x1FFE * 8) + 29 = 65549 
                        >65535 

                        * IPIDΪ1109ΪIDSһ 

                        * ICMP 

                        Ϊ8Ϊ0Echo Request 

                        УΪ0x0000ûмУ飬ȷе˵ICMPǷǷġ 

                        * UDP 

                        ĿĶ˿ûָ 

                        Դ˿ĿĶ˿ں1235ORĽ 

                        УΪ0x0000ICMPһûм㣬ǷUDP 

                        ɲֻһַa 

                        jolt2.cӦÿαԴIPַԴвûаûͼαװIPֵַsrc_addr֪ǲǹġ 


                        jolt2Ӱ൱ͨͣķƫܴݰδ򲹶WindowsϵͳͬʱҲjolt2ģIDSڸ߸µĹЧʣԡ 



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