答案解析 查看更多优质解析 解答一 举报 名词解释:ICMP: Internet Control Message Protocol, Internet控制报文协议。你的问题原意:在28ms内,收到来自202.108.22.5的第0个ICMP报文。这句话一般来自于ping程序测试网络好坏的过程。 解析看不懂?免费查看同类题视频解析查看解答 ...
Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 Request timeout for icmp_seq 3 64 bytes from 14.215.177.39: icmp_seq=0 ttl=55 time=4262.004 ms 64 bytes from 14.215.177.39:icmp_seq=1 ttl=55 time=3726.616 ms ...
Smurf方式把源IP设置为受害者IP,然后向多台服务器发送ICMP报文(通常是ECHO请求),这些接收报文的服务器被报文欺骗,向受害者返回ECHO应答(Type=0),导致垃圾阻塞受害者的门口 alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"GPL SCAN Broadscan Smurf Scanner"; dsize:4; icmp_id:0; icmp_seq:0; i...
名词解释:ICMP: Internet Control Message Protocol, Internet控制报文协议。你的问题原意:在28ms内,收到来自202.108.22.5的第0个ICMP报文。这句话一般来自于ping程序测试网络好坏的过程。
3. icmp_id:<number>; Example: This example looks for an ICMP ID of 0: icmp_id:0; 4. icmp_seq:<number>; Example: This example looks for an ICMP Sequence of 0: icmp_seq:0; 5. icmpv6-csum:<valid/invalid>; 6. icmpv4-csum:<valid/invalid>; Reference 完全理解ICMP协议 RFC792 rfc...
8.ping执行打印的信息 输出字节数,是64;输出目的主机的IP地址,是通过DNS协议解析来的;输出icmp_seq,是序列号,ttl,是 生存时间,time是往返时间,如果是0是因为系统的计时器分辨率低。 Linux Tcpdump: Filter ipv6 ntp ping packets ———
alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"ICMP Source Quench"; icode:0; itype:4; classtype:bad-unknown; sid:477; rev:2;) alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"ICMP Broadscan Smurf Scanner"; dsize:4; icmp_id:0; icmp_seq:0; itype:8; classtype:atte...
icmp->icmp_type=ICMP_ECHO;//回显请求icmp->icmp_code=0; icmp->icmp_cksum=0; icmp->icmp_seq=0; icmp->icmp_id=pid; tval= (structtimeval *)icmp->icmp_data; gettimeofday(tval,NULL); icmp->icmp_cksum=cal_chksum((unsignedshort*)icmp,sizeof(structicmp));//校验intn;//发包 。可以把这个...
((IcmpHeader*)icmp_data)->i_cksum = 0; ((IcmpHeader*)icmp_data)->timestamp = GetTickCount(); // 存入当前时间值 ((IcmpHeader*)icmp_data)->i_seq = seq_no++;// 计算校验和 ((IcmpHeader*)icmp_data)->i_cksum = checksum((USHORT*)icmp_data, datasize); // 为了最后计算ICMP包回来的...
echo reply 的消息类型为0.Code=0Checksum为从TYPE开始到IP包结束的校验和,也就是校验整个ICMP报文Identifier如果code = 0, identifier用来匹配echo和echo reply消息Sequence Number如果code = 0, identifier用来匹配echo和echo reply消息功能描述:收到echo 消息必须回应 echo reply 消息. identifier 和 sequence number...