nmap 指纹收集 kali系统

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本文通过使用Nmap工具对百度网站进行扫描，发现其防火墙已开启并过滤了大部分端口，仅开放了HTTP和HTTPS服务。进一步的探测显示，操作系统可能为Linux或Windows，但结果可靠性较低。TCP端口扫描确认了80和443端口的开放状态，而UDP端口则未发现明显开放迹象。

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nmap www.baidu.com 扫描防火墙是否开启

Starting Nmap 7.70 ( https://nmap.org ) at 2018-12-19 16:06 HKT
Nmap scan report for www.baidu.com (61.135.169.125)
Host is up (0.039s latency).
Not shown: 998 filtered ports // 开启了端口过滤开启了防火墙
PORT STATE SERVICE
80/tcp open http
443/tcp open https

nmap -F www.baidu.com 加快探测速度

nmap -O www.baidu.com 探测主机操作系统

Starting Nmap 7.70 ( https://nmap.org ) at 2018-12-19 16:14 HKT
Nmap scan report for www.baidu.com (61.135.169.125)
Host is up (0.033s latency).
Not shown: 998 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: WAP|general purpose
Running: Actiontec embedded, Linux 2.4.X|3.X, Microsoft Windows XP|7|2012
OS CPE: cpe:/h:actiontec:mi424wr-gen3i cpe:/o:linux:linux_kernel cpe:/o:linux:linux_kernel:2.4.37 cpe:/o:linux:linux_kernel:3.2 cpe:/o:microsoft:windows_xp::sp3 cpe:/o:microsoft:windows_7 cpe:/o:microsoft:windows_server_2012
OS details: Actiontec MI424WR-GEN3I WAP, DD-WRT v24-sp2 (Linux 2.4.37), Linux 3.2, Microsoft Windows XP SP3, Microsoft Windows XP SP3 or Windows 7 or Windows Server 2012

nmap -sT www.baidu.com 探测主机tcp端口开发情况

Starting Nmap 7.70 ( https://nmap.org ) at 2018-12-19 16:17 HKT
Nmap scan report for www.baidu.com (61.135.169.121)
Host is up (0.043s latency).
Not shown: 998 filtered ports
PORT STATE SERVICE
80/tcp open http
443/tcp open https

nmap -sU www.baidu.com 探测主机udp端口开发情况

Starting Nmap 7.70 ( https://nmap.org ) at 2018-12-19 16:20 HKT
Nmap scan report for www.baidu.com (61.135.169.121)
Host is up (0.00059s latency).
All 100 scanned ports on www.baidu.com (61.135.169.121) are open|filtered