TCP・UDPのWell Known Ports
ここでは、TCPやUDPのポート番号で「良く知られたポート(Well Known Ports)」をリストします。 IANA(Internet Assigned Numbers Authority)により規定された2004/09/28のものから100番までをリストしています。 より詳細を知りたい方はこちらをご覧下さい。
| ポート番号 | tcp/udp | サービス名 | 説明 |
| 0 | tcp/udp | Reserved | |
| 1 | tcp/udp | tcpmux | TCP Port Service Multiplexer |
| 2 | tcp/udp | compressnet | Management Utility |
| 3 | tcp/udp | compressnet | Compression Process |
| 5 | tcp/udp | rje | Remote Job Entry |
| 7 | tcp/udp | echo | Echo |
| 9 | tcp/udp | discard | Discard |
| 11 | tcp/udp | systat | Active Users |
| 13 | tcp/udp | daytime | Daytime (RFC 867) |
| 17 | tcp/udp | qotd | Quote of the Day |
| 18 | tcp/udp | msp | Message Send Protocol |
| 19 | tcp/udp | chargen | Character Generator |
| 20 | tcp/udp | ftp-data | File Transfer [Default Data] |
| 21 | tcp/udp | ftp | File Transfer [Control] |
| 22 | tcp/udp | ssh | SSH Remote Login Protocol |
| 23 | tcp/udp | telnet | Telnet |
| 24 | tcp/udp | any private mail system | |
| 25 | tcp/udp | smtp | Simple Mail Transfer |
| 27 | tcp/udp | nsw-fe | NSW User System FE |
| 29 | tcp/udp | msg-icp | MSG ICP |
| 31 | tcp/udp | msg-auth | MSG Authentication |
| 33 | tcp/udp | dsp | Display Support Protocol |
| 35 | tcp/udp | any private printer server | |
| 37 | tcp/udp | time | Time |
| 38 | tcp/udp | rap | Route Access Protocol |
| 39 | tcp/udp | rlp | Resource Location Protocol |
| 41 | tcp/udp | graphics | Graphics |
| 42 | tcp/udp | name | Host Name Server |
| 42 | tcp/udp | nameserver | Host Name Server |
| 43 | tcp/udp | nicname | Who Is |
| 44 | tcp/udp | mpm-flags | MPM FLAGS Protocol |
| 45 | tcp/udp | mpm | Message Processing Module [recv] |
| 46 | tcp/udp | mpm-snd | MPM [default send] |
| 47 | tcp/udp | ni-ftp | NI FTP |
| 48 | tcp/udp | auditd | Digital Audit Daemon |
| 49 | tcp/udp | tacacs | Login Host Protocol (TACACS) |
| 50 | tcp/udp | re-mail-ck | Remote Mail Checking Protocol |
| 51 | tcp/udp | la-maint | IMP Logical Address Maintenance |
| 52 | tcp/udp | xns-time | XNS Time Protocol |
| 53 | tcp/udp | domain | Domain Name Server |
| 54 | tcp/udp | xns-ch | XNS Clearinghouse |
| 55 | tcp/udp | isi-gl | ISI Graphics Language |
| 56 | tcp/udp | xns-auth | XNS Authentication |
| 57 | tcp/udp | any private terminal access | |
| 58 | tcp/udp | xns-mail | XNS Mail |
| 59 | tcp/udp | any private file service | |
| 60 | tcp/udp | Unassigned | |
| 61 | tcp/udp | ni-mail | NI MAIL |
| 62 | tcp/udp | acas | ACA Services |
| 63 | tcp/udp | whois++ | whois++ |
| 64 | tcp/udp | covia | Communications Integrator (CI) |
| 65 | tcp/udp | tacacs-ds | TACACS-Database Service |
| 66 | tcp/udp | sql*net | Oracle SQL*NET |
| 67 | tcp/udp | bootps | Bootstrap Protocol Server |
| 68 | tcp/udp | bootpc | Bootstrap Protocol Client |
| 69 | tcp/udp | tftp | Trivial File Transfer |
| 70 | tcp/udp | gopher | Gopher |
| 71 | tcp/udp | netrjs-1 | Remote Job Service |
| 72 | tcp/udp | netrjs-2 | Remote Job Service |
| 73 | tcp/udp | netrjs-3 | Remote Job Service |
| 74 | tcp/udp | netrjs-4 | Remote Job Service |
| 75 | tcp/udp | any private dial out service | |
| 76 | tcp/udp | deos | Distributed External Object Store |
| 77 | tcp/udp | any private RJE service | |
| 78 | tcp/udp | vettcp | vettcp |
| 79 | tcp/udp | finger | Finger |
| 80 | tcp/udp | http | World Wide Web HTTP |
| 80 | tcp/udp | www | World Wide Web HTTP |
| 80 | tcp/udp | www-http | World Wide Web HTTP |
| 81 | tcp/udp | hosts2-ns | HOSTS2 Name Server |
| 82 | tcp/udp | xfer | XFER Utility |
| 83 | tcp/udp | mit-ml-dev | MIT ML Device |
| 84 | tcp/udp | ctf | Common Trace Facility |
| 85 | tcp/udp | mit-ml-dev | MIT ML Device |
| 86 | tcp/udp | mfcobol | Micro Focus Cobol |
| 87 | tcp/udp | any private terminal link | |
| 88 | tcp/udp | kerberos | Kerberos |
| 89 | tcp/udp | su-mit-tg | SU/MIT Telnet Gateway |
| 90 | tcp/udp | dnsix | DNSIX Securit Attribute Token Map |
| 91 | tcp/udp | mit-dov | MIT Dover Spooler |
| 92 | tcp/udp | npp | Network Printing Protocol |
| 93 | tcp/udp | dcp | Device Control Protocol |
| 94 | tcp/udp | objcall | Tivoli Object Dispatcher |
| 95 | tcp/udp | supdup | SUPDUP |
| 96 | tcp/udp | dixie | DIXIE Protocol Specification |
| 97 | tcp/udp | swift-rvf | Swift Remote Virtural File Protocol |
| 98 | tcp/udp | tacnews | TAC News |
| 99 | tcp/udp | metagram | Metagram Relay |
| 100 | tcp/udp | newacct | [unauthorized use] |
Privateに使ってよいポート番号：49125〜65535
