Analyze the captured packets to inspect the SSH traffic. tcpdump will display information such as source and destination IP addresses, port numbers, packet timestamps, and packet contents. We can filter tcp port 22 intcpdump commandto capture all the ssh traffic. tcpdump -i eth0 tcp port 2...
-s : Define the snaplength (size) of the capture in bytes. Use -s0 to get everything, unless you are intentionally capturing less. -S : Print absolute sequence numbers. -e : Get the ethernet header as well. -q : Show less protocol information. -E : Decrypt IPSEC traffic by providing...
-nn : Don't resolve hostnames or port names. -X : Show the packet's contents in both hex and ASCII. -XX : Same as -X, but also shows the ethernet header. -v, -vv, -vvv : Increase the amount of packet information you get back. -c : Only get x number of packets and...
Show me all PUSH (PSH) packets… 1 2 3 #!/bin/bash tcpdump'tcp[13] & 8!=0' Show me all RESET (RST) packets… 1 2 3 #!/bin/bash tcpdump'tcp[13] & 4!=0' Show me all SYNCHRONIZE (SYN) packets… 1 2 #!/bin/bash tcpdump'tcp[13] & 2!=0' Show me all FINISH (FIN)...
tcpdump port 3389 tcpdump src port 1025 Common Options: -nn : Don’t resolve hostnames or port names -S : Get the entire packet. -X : Get hex output. Show Traffic of One Protocol If you’re looking for one particular kind of traffic, you can use tcp, udp, icmp, and many...
NNI-p1> port show port 1 +--- PORT 1 INFO ---+ | Field | Admin | Oper | +---+---+---+ | Mirror-port | Off | Off | <<-- not set | Mirroring Encapsulation | none | | | Mirror Encap VID | 1 | | | Mirror Encap TPID | 8100 | |...
Don’t resolve hostnames or port names 5. tcpdump-X Show the packet’s contents in both hex and ASCII 代码语言:txt 复制 [user@XXX ~]$ sudo tcpdump -i eth1 -nX tcpdump: verbose output suppressed, use -v or -vv for full protocol decode ...
Figure 1 showcases some of the most consequential options, demonstrating the versatility and inflexibility of the tool. How TCPdump Works in Cyber Security? TCPdump is a very useful tool and could be used to recon the advanced system administration and troubleshoot. The first step when ...
-n Do not resolve numbers into names. We do not want tcpdump to interpret things like port numbers into service names for us. As the investigator, it's our job to interpret the data. -tttt Four ts. Display the date, followed by the time—just the way we like to see it to support...
tcpdump port 3389 代码语言:txt 复制 tcpdump src port 1025 Show Traffic of One Protocol 代码语言:txt 复制 tcpdump icmp Find Traffic by IP 代码语言:txt 复制 tcpdump host 1.1.1.1 Filtering by Source and/or Destination 代码语言:txt 复制 ...