跟蹤我的服務器上的特定端口

Question

在我的apache服務器上，想要通過本地PC在家中跟蹤特定端口，那麼如何使用nmap，假設端口號是3080. 任何命令？

Answer 1

看一看的tcpdump命令：

$ sudo tcpdump -n -i eth2 dst port 3080 
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode 
listening on eth2, link-type EN10MB (Ethernet), capture size 65535 bytes 

這聽的eth2接口（我的無線連接）的端口3080

而在另一個shell傳出連接上：

$ telnet google.com 3080 

要查看連接嘗試：

16:52:38.073965 IP 192.168.1.10.51290 > 74.125.227.70.3080: Flags [S], seq 4004145863, win 14600, options [mss 1460,sackOK,TS val 38502 ecr 0,nop,wscale 4], length 0 
16:52:39.071494 IP 192.168.1.10.51290 > 74.125.227.70.3080: Flags [S], seq 4004145863, win 14600, options [mss 1460,sackOK,TS val 38752 ecr 0,nop,wscale 4], length 0 
16:52:41.075491 IP 192.168.1.10.51290 > 74.125.227.70.3080: Flags [S], seq 4004145863, win 14600, options [mss 1460,sackOK,TS val 39253 ecr 0,nop,wscale 4], length 0 
^C 
3 packets captured 
3 packets received by filter 
0 packets dropped by kernel 

另請參見Wireshark