Il raggio delle porte va da 0 a 65535, gli indirizzi di porta pi noti sono detti Well Known Services -servizi ben noti-... sono tutti numeri "fissi" (standard) e quindi, tranne in rarissimi casi svolgono la funzione qui descritta. Ringrazio Greg Garber (greggarber@worldnet.att.net) che  l'autore di questa utile lista e rootwurm (rootwurm@pheces.org) che la ha messa a disposizione di tutti sul web.

0 = Reserved
1 = tcpmux
2 = compressnet
3 = compressnet
4 = Unassigned
5 = Remote Job Entr
6 = Unassigned
7 = Echo
8 = Unassigned
9 = Discard
10 = Unassigned
11 = Active Users
12 = Unassigned
13 = Daytime
14 = Unassigned
15 = Unassigned
16 = Unassigned
17 = Quote of the Day
18 = Message Send Protocol
19 = Character Generator
20 = FTP (Data)
21 = FTP (Control)
22 = Unassigned
23 = Telnet
24 = Private mail-system
25 = SMTP
26 = Unassigned
27 = NSW User System FE
28 = Unassigned
29 = MSG ICP
30 = Unassigned
31 = MSG Authentication
32 = Unassigned
33 = Display Support Protocol
34 = Unassigned
35 = Private printer server
36 = Unassigned
37 = Time
38 = Route Access Protocol
39 = Resource Location Protocol
40 = Unassigned
41 = Graphics
42 = Host Name Server
43 = Who Is
44 = MPM FLAGS Protocol
45 = Message Processing Module (recv)
46 = mpm-snd, MPM (default send)
47 = ni-ftp
48 = Digital Audit Daemon
49 = login, Login Host Protocol
50 = re-mail-ck, Remote Mail Checking Protocol
51 = IMP Logical Address Maintenance
52 = xns-time, XNS Time Protocol
53 = domain, Domain Name Server
54 = xns-ch, XNS Clearinghouse
55 = ISI Graphics Language
56 = XNS Authentication
57 = Private terminal access
58 = XNS Mail
59 = Private file service
60 = Unassigned
61 = NI MAIL
62 = ACA Services
63 = Unassigned
64 = Communications Integrator (CI)
65 = TACACS-Database Service
66 = Oracle SQL*NET
67 = Bootstrap Protocol Server
68 = Bootstrap Protocol Client
69 = Trivial File Transfer
70 = Gophergopher
71 = Remote Job Service
72 = Remote Job Service
73 = Remote Job Service
74 = Remote Job Service
75 = any private dial out service
76 = Distributed External Object Store
77 = any private RJE service
78 = vettcpvettcp
79 = Finger server
80 = HTTP
81 = HOSTS2 Name Server
82 = XFER Utility
83 = MIT ML Device
84 = Common Trace Facility
85 = MIT ML Device
86 = Micro Focus Cobol
87 = Private terminal link
88 = Kerberos
89 = SU/MIT Telnet Gateway
90 = DNSIX Securit Attribute Token Map
91 = MIT Dover Spooler
92 = Network Printing Protocol
93 = Device Control Protocol
94 = Tivoli Object Dispatcher
95 = SUPDUPsupdup
96 = DIXIE Protocol Specification
97 = Swift Remote Vitural File Protocol
98 = TAC Newstacnews
99 = Metagram Relay
100 = newacct [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's MUMPS
189 = Queued File Transport
189 = Queued File Transport
190 = Gateway Access Control Protocol
190 = Gateway Access Control Protocol
191 = Prospero Directory Service
191 = Prospero Directory Service
192 = OSU Network Monitoring System
193 = srmp, Spider Remote Monitoring Protocol
194 = irc, Internet Relay Chat Protocl
195 = DNSIX Network Level Module Audit
196 = DNSIX Session Mgt Module Audit Redir
197 = Directory Location Service
198 = Directory Location Service Monitor
199 = SMUX
200 = IBM System Resource Controller
201 = at-rtmp AppleTalk Routing Maintenance
202 = at-nbp AppleTalk Name Binding
203 = at-3 AppleTalk Unused
204 = AppleTalk Echo
205 = AppleTalk Unused
206 = AppleTalk Zone Information
207 = AppleTalk Unused
208 = AppleTalk Unused
209 = Trivial Authenticated Mail Protocol
210 = ANSI Z39.50z39.50
211 = Texas Instruments 914C/G Terminal
212 = ATEXSSTRanet
213 = IPX
214 = VM PWSCSvmpwscs
215 = Insignia Solutions
216 = Access Technology License Server
217 = dBASE Unix
218 = Netix Message Posting Protocol
219 = Unisys ARPsuarps
220 = Interactive Mail Access Protocol v3
221 = Berkeley rlogind with SPX auth
222 = Berkeley rshd with SPX auth
223 = Certificate Distribution Center
224 = Reserved (224-241)
241 = Reserved (224-241)
242 = Unassigned#
243 = Survey Measurement
244 = Unassigned#
245 = LINKlink
246 = Display Systems Protocol
247-255 = Reserved
256-343 = Unassigned
344 = Prospero Data Access Protocol
345 = Perf Analysis Workbench
346 = Zebra serverzserv
347 = Fatmen Serverfatserv
348 = Cabletron Management Protocol
349-370 = Unassigned
371 = Clearcaseclearcase
372 = Unix Listservulistserv
373 = Legent Corporation
374 = Legent Corporation
375 = Hasslehassle
376 = Amiga Envoy Network Inquiry Proto
377 = NEC Corporation
378 = NEC Corporation
379 = TIA/EIA/IS-99 modem client
380 = TIA/EIA/IS-99 modem server
381 = hp performance data collector
382 = hp performance data managed node
383 = hp performance data alarm manager
384 = A Remote Network Server System
385 = IBM Application
386 = ASA Message Router Object Def.
387 = Appletalk Update-Based Routing Pro.
388 = Unidata LDM Version 4
389 = Lightweight Directory Access Protocol
390 = UISuis
391 = SynOptics SNMP Relay Port
392 = SynOptics Port Broker Port
393 = Data Interpretation System
394 = EMBL Nucleic Data Transfer
395 = NETscout Control Protocol
396 = Novell Netware over IP
397 = Multi Protocol Trans. Net.
398 = Kryptolankryptolan
399 = Unassigned#
400 = Workstation Solutions
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
1348 = 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
8010 = Wingate
8181 = IMail
9535 = man
