Sequence number (LE): 5376 (0x1500) //序列号,用于区分在windows下抓包,每一个ICMP包的序列号都不一样 [No response seen] Data (64 bytes) //数据部分 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 这是我们刚才通过ping命令抓的ICMP协议包,其中request是ICMP请求数据报,reply是ICMP回答数据...
⑤ 使用抓包过滤器:icmp[0:1]=8。 ⑥ 可以看到只抓到四个请求数据包,并且 No response seen 没有看到响应(实际是有的)。 ⑦ 打开一个响应包,可以看到Type:0,因为ICMP头部类型处于最开始的位置,因此Offset参数就应该从0开始,size部分应该设置为1字节,offset的值为0,表达式就是这样:icmp[0:1]=0。 ⑧ 使用...
ICMP的type为request(128),编号为0。 Checksum大小为16字节。 Sequence大小为16字节。 Identifier大小为16字节。 4. Examine the corresponding ping reply packet. What are the ICMP type and code numbers? What other fields does this ICMP packet have? How many bytes are the checksum, sequence number and...
Response响应报⽂ No such name，没有Answers 源端⼝号50161，⽬的端⼝号53，报⽂长度41，检错码0xb9ad，报⽂标识号Transaction ID为0x0002，从Flags可知为递归查询。Type:A(Host Address)(1)，表⽰该报⽂提出⼀个查询ipv4地址的请求。response这是⼀个响应报⽂。源端⼝号51，⽬的端⼝...
- The next sequence number is less than or equal to the last-seen acknowledgement number.Supersedes “Fast Retransmission”, “Out-Of-Order”, and “Retransmission”. 分析答案 数据帧 131 为一个虚假重传,是哪一个前帧导致这个帧被标记为“虚假”:No.127 。 感谢阅读,更多技术文章可关注个人公众号:...
Set first graph to filter:ip.addr==a.b.c.d&&frame.pkt_len Calc:AVG frame.pkt_len LOAD: The LOAD io-stat type is very different from anything you have ever seen before! While the response times themselves as plotted by MIN,MAX,AVG are indications on the Server load (which affects ...
We have seen similar activity from hosts infected with Bumblebee, IcedID, Emotet and other malware families. Pcap Analysis: File Transfer Over SMB Server Message Block (SMB) protocol enables file transfers between Windows hosts. The ultimate goal of threat actors who have gained access to a ...
Wireshark used to only show packets that contain an HTTP request or response code - it would ignore the data packets seen when an object is uploaded/downloaded. This is why we would only see 85 packets with the http filter. Now, Wireshark recognizes that when an object upload/download ...
2. The HTTP CONDITIONAL GET/response interaction 2.1 Packets Display 2.2 Question & Answer 8. no yes, because the status code is 200 yes 304 Not Modified. The server didn't. 3. Retrieving Long Documents 3.1 Packets Display 3.2 Question & Answer ...
前言承接之前一篇 《Packet Challenge 之 DNS 案例分析》,在数据包跟踪文件 dnsing.pcapng 中,关于第 4 题(What is the largest DNS response time seen in this trace file? )的分析过程中曾经碰到一个小问题…