按端口号可分为3大类：
（1）公认端口（Well Known Ports）：从0到1023，它们紧密绑定（binding）于一些服务。通常这些端口的通讯明确表明了某种服务的协议。例如：80端口实际上总是HTTP通讯。
（2）注册端口（Registered Ports）：从1024到49151。它们松散地绑定于一些服务。也就是说有许多服务绑定于这些端口，这些端口同样用于许多其它目的。例如：许多系统处理动态端口从1024左右开始。
（3）动态和/或私有端口（Dynamic and/or Private Ports）：从49152到65535。理论上，不应为服务分配这些端口。实际上，机器通常从1024起分配动态端口。但也有例外：SUN的RPC端口从32768开始。
0 通常用于分析操作系统。这一方法能够工作是因为在一些系统中“0”是无效端口，当你试图使用一种通常的闭合端口连接它时将产生不同的结果。一种典型的扫描：使用IP地址为0.0.0.0，设置ACK位并在以太网层广播。
1tcpmuxTCP Port Service Multiplexer传输控制协议端口服务多路开关选择器
2compressnetManagement Utility compressnet 管理实用程序
3compressnetCompression Process 压缩进程
5rjeRemote Job Entry 远程作业登录
7echoEcho 回显
9discardDiscard 丢弃
11systatActive Users 在线用户
13daytimeDaytime 时间
17qotdQuote of the Day 每日引用
18mspMessage Send Protocol 消息发送协议
19chargenCharacter Generator 字符发生器
20ftp-dataFile Transfer[Default Data] 文件传输协议(默认数据口)
21ftpFile Transfer[Control] 文件传输协议(控制)
22sshSSH Remote Login Protocol SSH远程登录协议
23telnetTelnet 终端仿真协议
24any private mail system 预留给个人用邮件系统
25smtpSimple Mail Transfer 简单邮件发送协议
27nsw-feNSW User System FE NSW 用户系统现场工程师
29msg-icpMSG ICP MSGICP
31msg-authMSG Authentication MSG验证
33dspDisplay Support Protocol 显示支持协议
35any private printer server 预留给个人打印机服务
37timeTime 时间
38rapRoute Access Protocol 路由访问协议
39rlpResource Location Protocol 资源定位协议
41graphicsGraphics 图形
42nameserverWINS Host Name Server WINS 主机名服务
43nicnameWho Is "绰号" who is服务
44mpm-flagsMPM FLAGS Protocol MPM(消息处理模块)标志协议
45mpmMessage Processing Module [recv] 消息处理模块
46mpm-sndMPM [default send] 消息处理模块(默认发送口)
47ni-ftpNI FTP NI FTP
48auditdDigital Audit Daemon 数码音频后台服务49tacacsLogin Host Protocol (TACACS) TACACS登录主机协议50re-mail-ck Remote Mail Checking Protocol 远程邮件检查协议[未结束]
51la-maintIMP Logical Address Maintenance IMP(接口信息处理机)逻辑地址维护
52xns-timeXNS Time Protocol 施乐网络服务系统时间协议
53domainDomain Name Server 域名服务器
54xns-chXNS Clearinghouse 施乐网络服务系统票据交换 55isi-glISI Graphics Language ISI图形语言
56xns-authXNS Authentication 施乐网络服务系统验证
57?any private terminal access 预留个人用终端访问
58xns-mailXNS Mail 施乐网络服务系统邮件
59any private file service 预留个人文件服务
60Unassigned 未定义
61ni-mailNI MAIL NI邮件?
62acasACA Services 异步通讯适配器服务
63whois+ whois+ WHOIS+
64coviaCommunications Integrator (CI) 通讯接口
65tacacs-dsTACACS-Database Service TACACS数据库服务
66sql*netOracle SQL*NET Oracle SQL*NET
67bootpsBootstrap Protocol Server 引导程序协议服务端
68bootpcBootstrap Protocol Client 引导程序协议客户端
69tftpTrivial File Transfer 小型文件传输协议
70gopherGopher 信息检索协议
71netrjs-1Remote Job Service 远程作业服务
72netrjs-2Remote Job Service 远程作业服务
73netrjs-3Remote Job Service 远程作业服务
74netrjs-4Remote Job Service 远程作业服务
75any private dial out service 预留给个人拨出服务
76 deosDistributed External Object Store 分布式外部对象存储
77any private RJE service 预留给个人远程作业输入服务
78vettcpvettcp 修正TCP?
79fingerFinger 查询远程主机在线用户等信息
80httpWorld Wide Web HTTP 全球信息网超文本传输协议 81hosts2-nsHOSTS2 Name Server HOST2名称服务
82xferXFER Utility 传输实用程序
83mit-ml-devMIT ML Device 模块化智能终端ML设备
84ctfCommon Trace Facility 公用追踪设备
85mit-ml-devMIT ML Device 模块化智能终端ML设备
86mfcobolMicro Focus Cobol Micro Focus Cobol编程语言
87any private terminal link 预留给个人终端连接
88kerberosKerberos Kerberros安全认证系统
89su-mit-tgSU/MIT Telnet Gateway SU/MIT终端仿真网关
90dnsixDNSIX Securit Attribute Token Map DNSIX 安全属性标记图91mit-dovMIT Dover Spooler MIT Dover假脱机
92nppNetwork Printing Protocol 网络打印协议
93dcpDevice Control Protocol 设备控制协议
94objcallTivoli Object Dispatcher Tivoli对象调度
95supdup SUPDUP
96dixieDIXIE Protocol Specification DIXIE协议规范
97swift-rvf（Swift Remote Virtural File Protocol）快速远程虚拟文件协议98tacnewsTAC News TAC新闻协议
99metagramMetagram Relay
100newacct[unauthorized use]
101=NIC Host Name Server
102=ISO-TSAP
103=Genesis Point-to-Point Trans Net
104=ACR-NEMA Digital Imag. & Comm. 300
105=Mailbox Name Nameserver
106=3COM-TSMUX3com-tsmux
107=Remote Telnet Service
108=SNA Gateway Access Server
109=Post Office Protocol - Version 2
110=Post Office Protocol - Version 3
111=SUN RPC
112=McIDAS Data Transmission Protocol
113=Authentication Service
114=Audio News Multicast
115=Simple File Transfer Protocol
116=ANSA REX Notify
117=UUCP Path Service
118=SQL Servicessqlserv
119=Network News Transfer Protocol
120=CFDPTKTcfdptkt
121=Encore Expedited Remote Pro.Call
122=SMAKYNETsmakynet
123=Network Time Protocol
124=ANSA REX Trader
125=Locus PC-Interface Net Map Ser
126=Unisys Unitary Login
127=Locus PC-Interface Conn Server
128=GSS X License Verification
129=Password Generator Protocol
130=cisco FNATIVE
131=cisco TNATIVE
132=cisco SYSMAINT
133=Statistics Service
134=INGRES-NET Service
135=Location Service
136=PROFILE Naming System
137=NETBIOS Name Service
138=NETBIOS Datagram Service
139=NETBIOS Session Service
140=EMFIS Data Service
141=EMFIS Control Service
142=Britton-Lee IDM
143=Interim Mail Access Protocol v2
144=NewSnews
145=UAAC Protocoluaac
146=ISO-IP0iso-tp0
147=ISO-IPiso-ip
148=CRONUS-SUPPORT
149=AED 512 Emulation Service
150=SQL-NETsql-net
151=HEMShems
152=Background File Transfer Program
153=SGMPsgmp
154=NETSCnetsc-prod
155=NETSCnetsc-dev
156=SQL Service
157=KNET/VM Command/Message Protocol
158=PCMail Serverpcmail-srv
159=NSS-Routingnss-routing
160=SGMP-TRAPSsgmp-traps
161=SNMP
162=SNMP TRAP
163=CMIP/TCP Manager
164=CMIP/TCP Agent
165=Xeroxxns-courier
166=Sirius Systems
167=NAMPnamp
168=RSVDrsvd
169=Send
170=Network PostScript
170=Network PostScript
171=Network Innovations Multiplex
172=Network Innovations CL/1
173=Xyplexxyplex-mux
174=MAILQ
175=VMNET
176=GENRAD-MUXgenrad-mux
177=X Display Manager Control Protocol
178=NextStep Window Server
179=Border Gateway Protocol
180=Intergraphris
181=Unifyunify
182=Unisys Audit SITP
183=OCBinderocbinder
184=OCServerocserver
185=Remote-KIS
186=KIS Protocolkis
187=Application Communication Interface
188=Plus Five
401=Uninterruptible Power Supply
402=Genie Protocol
403=decapdecap
404=ncednced
405=ncldncld
406=Interactive Mail Support Protocol
407=Timbuktutimbuktu
408=Prospero Resource Manager Sys. Man.
409=Prospero Resource Manager Node Man.
410=DECLadebug Remote Debug Protocol
411=Remote MT Protocol
412=Trap Convention Port
413=SMSPsmsp
414=InfoSeekinfoseek
415=BNetbnet
416=Silverplattersilverplatter
417=Onmuxonmux
418=Hyper-Ghyper-g
419=Arielariel1
420=SMPTEsmpte
421=Arielariel2
422=Arielariel3
423=IBM Operations Planning and Control Start
424=IBM Operations Planning and Control Track
425=ICADicad-el
426=smartsdpsmartsdp
427=Server Location
429=OCS_AMU
430=UTMPSDutmpsd
431=UTMPCDutmpcd
432=IASDiasd
433=NNSPnnsp
434=MobileIP-Agent
435=MobilIP-MN
436=DNA-CMLdna-cml
437=comscmcomscm
439=dasp, Thomas Obermair
440=sgcpsgcp
441=decvms-sysmgtdecvms-sysmgt
442=cvc_hostdcvc_hostd
443=https
444=Simple Network Paging Protocol
445=Microsoft-DS
446=DDM-RDBddm-rdb
447=DDM-RFMddm-dfm
448=DDM-BYTEddm-byte
449=AS Server Mapper
450=TServertserver
512=exec, Remote process execution
513=login, remote login
514=cmd, exec with auto auth.
514=syslog
515=Printer spooler
516=Unassigned
517=talk
519=unixtime
520=extended file name server
521=Unassigned
522=Unassigned
523=Unassigned
524=Unassigned
526=newdate
530=rpc courier
531=chatconference
532=readnewsnetnews
533=for emergency broadcasts
539=Apertus Technologies Load Determination
540=uucp
541=uucp-rlogin
542=Unassigned
543=klogin
544=kshell
545=Unassigned
546=Unassigned
547=Unassigned
548=Unassigned
549=Unassigned
550=new-who
551=Unassigned
552=Unassigned
553=Unassigned
554=Unassigned
555=dsf
556=remotefs
557-559=rmonitor
560=rmonitord
561=dmonitor
562=chcmd
563=Unassigned
564=plan 9 file service
565=whoami
566-569 Unassigned
570=demonmeter
571=udemonmeter
572-599 Unassigned ipc server
600=Sun IPC server
607=nqs
606=Cray Unified Resource Manager
608=Sender-Initiated/Unsolicited File Transfer
609=npmp-trapnpmp-trap
610=npmp-localnpmp-local
611=npmp-guinpmp-gui
634=ginadginad
666=Doom Id Software
704=errlog copy/server daemon
709=EntrustManager
729=IBM NetView DM/6000 Server/Client
730=IBM NetView DM/6000 send/tcp
731=IBM NetView DM/6000 receive/tcp
741=netGWnetgw
742=Network based Rev. Cont. Sys.
744=Flexible License Manager
747=Fujitsu Device Control
748=Russell Info Sci Calendar Manager
749=kerberos administration
751=pump
752=qrh
754=send
758=nlogin
759=con
760=ns
762=quotad
763=cycleserv
765=webster
767=phonephonebook
769=vid
771=rtip
772=cycleserv2
774=acmaint_dbd
775=acmaint_transd
780=wpgs
786=Concertconcert
800=mdbs_daemon
996=Central Point Software
997=maitrd
999=puprouter
1023=Reserved
1024=Reserved
1025=network blackjack
1030=BBN IAD
1031=BBN IAD
1032=BBN IAD
1067=Installation Bootstrap Proto. Serv.
1068=Installation Bootstrap Proto. Cli.
1080=SOCKS
1083=Anasoft License Manager
1084=Anasoft License Manager
1155=Network File Access
1222=SNI R&D network
1248=hermes
1346=Alta Analytics License Manager
1347=multi media conferencing
1347=multi media conferencing
1tyue=multi media conferencing
1349=Registration Network Protocol
1350=Registration Network Protocol
1351=Digital Tool Works (MIT)
1352=/Lotus Notelotusnote
1353=Relief Consulting
1354=RightBrain Software
1355=Intuitive Edge
1356=CuillaMartin Company
1357=Electronic PegBoard
1358=CONNLCLIconnlcli
1359=FTSRVftsrv
1360=MIMERmimer
1361=LinX
1362=TimeFliestimeflies
1363=Network DataMover Requester
1364=Network DataMover Server
1365=Network Software Associates
1366=Novell NetWare Comm Service Platform
1367=DCSdcs
1368=ScreenCastscreencast
1369=GlobalView to Unix Shell
1370=Unix Shell to GlobalView
1371=Fujitsu Config Protocol
1372=Fujitsu Config Protocol
1373=Chromagrafxchromagrafx
1374=EPI Software Systems
1375=Bytexbytex
1376=IBM Person to Person Software
1377=Cichlid License Manager
1378=Elan License Manager
1379=Integrity Solutions
1380=Telesis Network License Manager
1381=Apple Network License Manager
1382=udt_os
1383=GW Hannaway Network License Manager
1384=Objective Solutions License Manager
1385=Atex Publishing License Manager
1386=CheckSum License Manager
1387=Computer Aided Design Software Inc LM
1388=Objective Solutions DataBase Cache
1389=Document Manager
1390=Storage Controller
1391=Storage Access Server
1392=Print Managericlpv-pm
1393=Network Log Server
1394=Network Log Client
1395=PC Workstation Manager software
1396=DVL Active Mail
1397=Audio Active Mail
1398=Video Active Mail
1399=Cadkey License Manager
1400=Cadkey Tablet Daemon
1401=Goldleaf License Manager
1402=Prospero Resource Manager
1403=Prospero Resource Manager
1404=Infinite Graphics License Manager
1405=IBM Remote Execution Starter
1406=NetLabs License Manager
1407=DBSA License Manager
1408=Sophia License Manager
1409=Here License Manager
1410=HiQ License Manager
1411=AudioFileaf
1412=InnoSysinnosys
1413=Innosys-ACLinnosys-acl
1414=IBM MQSeriesibm-mqseries
1415=DBStardbstar
1416=Novell LU6.2novell-lu6.2
1417=Timbuktu Service 1 Port
1417=Timbuktu Service 1 Port
1418=Timbuktu Service 2 Port
1419=Timbuktu Service 3 Port
1420=Timbuktu Service 4 Port
1421=Gandalf License Manager
1422=Autodesk License Manager
1423=Essbase Arbor Software
1424=Hybrid Encryption Protocol
1425=Zion Software License Manager
1426=Satellite-data Acquisition System 1
1427=mloadd monitoring tool
1428=Informatik License Manager
1429=Hypercom NMSnms
1430=Hypercom TPDUtpdu
1431=Reverse Gosip Transport
1432=Blueberry Software License Manager
1433=Microsoft-SQL-Server
1434=Microsoft-SQL-Monitor
1435=IBM CISCibm-cics
1436=Satellite-data Acquisition System 2
1437=Tabulatabula
1438=Eicon Security Agent/Server
1439=Eicon X25/SNA Gateway
1440=Eicon Service Location Protocol
1441=Cadis License Management
1442=Cadis License Management
1443=Integrated Engineering Software
1444=Marcam License Management
1445=Proxima License Manager
1446=Optical Research Associates License Manager
1447=Applied Parallel Research LM
1448=OpenConnect License Manager
1449=PEportpeport
1450=Tandem Distributed Workbench Facility
1451=IBM Information Management
1452=GTE Government Systems License Man
1453=Genie License Manager
1454=interHDL License Manager
1454=interHDL License Manager
1455=ESL License Manager
1456=DCAdca
1457=Valisys License Manager
1458=Nichols Research Corp.
1459=Proshare Notebook Application
1460=Proshare Notebook Application
1461=IBM Wireless LAN
1462=World License Manager
1463=Nucleusnucleus
1464=MSL License Manager
1465=Pipes Platform
1466=Ocean Software License Manager
1467=CSDMBASEcsdmbase
1468=CSDMcsdm
1469=Active Analysis Limited License Manager
1470=Universal Analytics
1471=csdmbasecsdmbase
1472=csdmcsdm
1473=OpenMathopenmath
1474=Telefindertelefinder
1475=Taligent License Manager
1476=clvm-cfgclvm-cfg
1477=ms-sna-server
1478=ms-sna-base
1479=dberegisterdberegister
1480=PacerForumpacerforum
1481=AIRSairs
1482=Miteksys License Manager
1483=AFS License Manager
1484=Confluent License Manager
1485=LANSourcelansource
1486=nms_topo_serv
1487=LocalInfoSrvr
1488=DocStordocstor
1489=dmdocbrokerdmdocbroker
1490=insitu-confinsitu-conf
1491=anynetgateway
1492=stone-design-1
1493=netmap_lmnetmap_lm
1494=icaica
1495=cvccvc
1496=liberty-lmliberty-lm
1497=rfx-lmrfx-lm
1498=Watcom-SQLwatcom-sql
1499=Federico Heinz Consultora
1500=VLSI License Manager
1501=Satellite-data Acquisition System 3
1502=Shivashivadiscovery
1503=Databeamimtc-mcs
1504=EVB Software Engineering License Manager
1505=Funk Software, Inc.
1524=ingres
1525=oracle
1525=Prospero Directory Service non-priv
1526=Prospero Data Access Prot non-priv
1527=oracletlisrv
1529=oraclecoauthor
1600=issd
1651=proshare conf audio
1652=proshare conf video
1653=proshare conf data
1654=proshare conf request
1655=proshare conf notify
1661=netview-aix-1netview-aix-1
1662=netview-aix-2netview-aix-2
1663=netview-aix-3netview-aix-3
1664=netview-aix-4netview-aix-4
1665=netview-aix-5netview-aix-5
1666=netview-aix-6netview-aix-6
1986=cisco license management
1987=cisco RSRB Priority 1 port
1988=cisco RSRB Priority 2 port
1989=cisco RSRB Priority 3 port
1989=MHSnet systemmshnet
1990=cisco STUN Priority 1 port
1991=cisco STUN Priority 2 port
1992=cisco STUN Priority 3 port
1992=IPsendmsgipsendmsg
1993=cisco SNMP TCP port
1994=cisco serial tunnel port
1995=cisco perf port
1996=cisco Remote SRB port
1997=cisco Gateway Discovery Protocol
1998=cisco X.25 service (XOT)
1999=cisco identification port
2009=whosockami
2010=pipe_server
2011=raid
2012=raid-ac
2013=rad-am
2015=raid-cs
2016=bootserver
2017=terminaldb
2018=rellpack
2019=about
2019=xinupageserver
2020=xinupageserver
2021=xinuexpansion1
2021=down
2022=xinuexpansion2
2023=xinuexpansion3
2023=xinuexpansion4
2024=xinuexpansion4
2025=xribs
2026=scrabble
2027=shadowserver
2028=submitserver
2039=device2
2032=blackboard
2033=glogger
2034=scoremgr
2035=imsldoc
2038=objectmanager
2040=lam
2041=interbase
2042=isis
2043=isis-bcast
2044=primsl
2045=cdfunc
2047=dls
2048=dls-monitor
2065=Data Link Switch Read Port Number
2067=Data Link Switch Write Port Number
2201=Advanced Training System Program
2500=Resource Tracking system server
2501=Resource Tracking system client
2564=HP 3000 NS/VT block mode telnet
2784=world wide web - development
3049=ccmail
3264=ccmail, cc:mail/lotus
3333=dec-notes
3984=MAPPER network node manager
3985=MAPPER TCP/IP server
3986=MAPPER workstation server
3421=Bull Apprise portmapper
3900=Unidata UDT OS
4132=NUTS Daemonnuts_dem
4133=NUTS Bootp Server
4343=UNICALL
4444=KRB524
4672=remote file access server
5002=radio free ethernet
5010=TelepathStarttelelpathstart
5011=TelepathAttack
5050=multimedia conference control tool
5145=rmonitor_secure
5190=aol, America-Online
5300=HA cluster heartbeat
5301=hacl-gs # HA cluster general services
5302=HA cluster configuration
5303=hacl-probe HA cluster probing
5305=hacl-test
6000-6063=x11 X Window System
6111=sub-process HP SoftBench Sub-Process Control
6141/=meta-corp Meta Corporation License Manager
6142=aspentec-lm Aspen Technology License Manager
6143=watershed-lm Watershed License Manager
6144=statsci1-lm StatSci License Manager - 1
6145=statsci2-lm StatSci License Manager - 2
6146=lonewolf-lm Lone Wolf Systems License Manager
6147=montage-lm Montage License Manager
7000=afs3-fileserver file server itself
7001=afs3-callback callbacks to cache managers
7002=afs3-prserver users & groups database
7003=afs3-vlserver volume location database
7004=afs3-kaserver AFS/Kerberos authentication service
7005=afs3-volser volume managment server
7006=afs3-errors error interpretation service
7007=afs3-bos basic overseer process
7008=afs3-update server-to-server updater
7009=afs3-rmtsys remote cache manager service
7010=ups-online onlinet uninterruptable power supplies
7100=X Font Service
7200=FODMS FLIP
7626=冰河
8010=Wingate
8181=IMail
9535=man
45576=E代时光专业代理端口
