今天需要对一台网络上的服务器进行端口扫描，试用了一些，觉得nmap是一款不错的端口扫描软件，和大家分享一下。
软件档案
名称：nmap
版本：v5.21
大小：GUI版本：14.8MB
系统：Windows 2000/XP/Vista/7/2008
下载：http://nmap.org/dist/nmap-5.21-setup.exe
是否收费： 免费
是否绿色： 绿色软件
是否开源：开源
说明：这里下载的是Windows下的GUI版本。实际上nmap是一款跨平台的端口扫描工具，有Linux, Windows, and Mac OS X等版本。
安装
下载后安装，一路Next即可。
注意：需要按照WinPcap 4.1.1版本
安装完成:
一睹为快
安装后图标如下：
启动后如图：
看样子nmap应该是一款命令行下的工具。这个只是nmap的GUI界面
拿google练手
看看完整的报告：
Starting Nmap 5.21 ( http://nmap.org ) at 2010-06-23 23:46 中国标准时间
NSE: Loaded 36 scripts for scanning.
Initiating Ping Scan at 23:46
Scanning google.com (66.249.89.99) [8 ports]
Completed Ping Scan at 23:46, 0.55s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 23:46
Completed Parallel DNS resolution of 1 host. at 23:46, 11.02s elapsed
Initiating SYN Stealth Scan at 23:46
Scanning google.com (66.249.89.99) [1000 ports]
Discovered open port 443/tcp on 66.249.89.99
Discovered open port 80/tcp on 66.249.89.99
Completed SYN Stealth Scan at 23:47, 38.60s elapsed (1000 total ports)
Initiating Service scan at 23:47
Scanning 2 services on google.com (66.249.89.99)
Completed Service scan at 23:47, 23.71s elapsed (2 services on 1 host)
Initiating OS detection (try #1) against google.com (66.249.89.99)
Retrying OS detection (try #2) against google.com (66.249.89.99)
Initiating Traceroute at 23:47
Completed Traceroute at 23:48, 0.25s elapsed
NSE: Script scanning 66.249.89.99.
NSE: Starting runlevel 1 (of 1) scan.
Initiating NSE at 23:48
Completed NSE at 23:48, 19.50s elapsed
NSE: Script Scanning completed.
Nmap scan report for google.com (66.249.89.99)
Host is up (0.24s latency).
Hostname google.com resolves to 2 IPs. Only scanned 66.249.89.99
rDNS record for 66.249.89.99: nrt04s01-in-f99.1e100.net
Not shown: 997 filtered ports
PORT STATE SERVICE VERSION
80/tcp open http Google httpd 2.0 (GFE)
| html-title: 302 Moved
|_Requested resource was http://www.google.com.hk/url?sa=p&cki=PREF%3DID%3D4729719c31799784:FF%3D2:LD%3Dzh-CN:NW%3D1:TM%3D1277308057:LM%3D1277308057:S%3DiBvdTBoKvkMtBvt-&q=http://www.google.com.hk/&ust=1277308087644484&usg=AFQjCNH2UNPvO_c0LJuvHKBzrpBzkPTQrg
113/tcp closed auth
443/tcp open ssl/http Google httpd 2.0 (GFE)
| robots.txt: has 201 disallowed entries (15 shown)
| /search /groups /images /catalogs /catalogues /news
| /nwshp /setnewsprefs? /index.html? /? /addurl/image? /pagead/
|_/relpage/ /relcontent /imgres
|_http-favicon: Unknown favicon MD5: 09B565A51E14B721A323F0BA44B2982A
| html-title: 302 Moved
|_Requested resource was http://www.google.com/
OS fingerprint not ideal because: Didn\'t receive UDP response. Please try again with -sSU
No OS matches for host
Network Distance: 1 hop
TCP Sequence Prediction: Difficulty=262 (Good luck!)
IP ID Sequence Generation: Randomized
Service Info: OS: Linux
TRACEROUTE (using port 113/tcp)
HOP RTT ADDRESS
1 242.00 ms nrt04s01-in-f99.1e100.net (66.249.89.99)
Read data files from: C:\Program Files\Nmap
OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 102.19 seconds
Raw packets sent: 2094 (95.652KB) | Rcvd: 45 (2214B)
哇，只有80和443端口开放，而且连http服务器软件也获取到了。 操作系统也是Linux。
恩，这个port界面挺不错的：
还有网络拓扑图：
nmap 由于参数复杂，所以它的GUI工具Zenmap提供了多个Profile来便于使用，看看“Quick Scan”
这只是nmap的初步使用，等我以后掌握了更多的用法，再和大家分享吧。