| 常用默認端口列表及功能中文註解:
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| 端口 | 服務 | 全名 | 說明
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| 1 | tcpmux | TCP Port Service Multiplexer | 傳輸控制協議端口服務多路開關選擇器
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| 2 | compressnet | Management Utility | compressnet 管理實用程序
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| 3 | compressnet | Compression Process | 壓縮進程
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| 5 | rje | Remote Job Entry | 遠程作業登錄
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| 7 | echo | Echo | 回顯
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| 9 | discard | Discard | 丟棄
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| 11 | systat | Active Users | 在線用戶
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| 13 | daytime | Daytime | 時間
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| 17 | qotd | Quote of the Day | 每*引用
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| 18 | msp | Message Send Protocol | 消息發送協議
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| 19 | chargen | Character Generator | 字符發生器
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| 20 | ftp-data | File Transfer [Default Data] | 文件傳輸協議(默認數據口)
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| 21 | ftp | File Transfer [Control] | 文件傳輸協議(控制)
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| 22 | ssh | SSH Remote Login Protocol | SSH遠程登錄協議
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| 23 | telnet | Telnet | 終端仿真協議
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| 24 | ? | any private mail system | 預留給個人用郵件系統
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| 25 | smtp | Simple Mail Transfer | 簡單郵件發送協議
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| 27 | nsw-fe | NSW User System FE | NSW 用戶系統現場工程師
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| 29 | msg-icp | MSG ICP | MSG ICP
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| 31 | msg-auth | MSG Authentication | MSG驗證
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| 33 | dsp | Display Support Protocol | 顯示支持協議
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| 35 | ? | any private printer server | 預留給個人打印機服務
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| 37 | time | Time | 時間
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| 38 | rap | Route Access Protocol | 路由訪問協議
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| 39 | rlp | Resource Location Protocol | 資源定位協議
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| 41 | graphics | Graphics | 圖形
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| 42 | nameserver | WINS Host Name Server | WINS 主機名服務
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| 43 | nicname | Who Is | "綽號" who is服務
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| 44 | mpm-flags | MPM FLAGS Protocol | MPM(消息處理模塊)標誌協議
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| 45 | mpm | Message Processing Module [recv] | 消息處理模塊
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| 46 | mpm-snd | MPM [default send] | 消息處理模塊(默認發送口)
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| 47 | ni-ftp | NI FTP | NI FTP
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| 48 | auditd | Digital Audit Daemon | 數碼音頻後台服務
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| 49 | tacacs | Login Host Protocol (TACACS) | TACACS登錄主機協議
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| 50 | re-mail-ck | Remote Mail Checking Protocol | 遠程郵件檢查協議
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| 51 | la-maint | IMP Logical Address Maintenance | IMP(接口信息處理機)邏輯地址維護
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| 52 | xns-time | XNS Time Protocol | 施樂網絡服務系統時間協議
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| 53 | domain | Domain Name Server | 域名服務器
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| 54 | xns-ch | XNS Clearinghouse | 施樂網絡服務系統票據交換
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| 55 | isi-gl | ISI Graphics Language | ISI圖形語言
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| 56 | xns-auth | XNS Authentication | 施樂網絡服務系統驗證
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| 57 | ? | any private terminal access | 預留個人用終端訪問
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| 58 | xns-mail | XNS Mail | 施樂網絡服務系統郵件
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| 59 | ? | any private file service | 預留個人文件服務
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| 60 | ? | Unassigned | 未定義
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| 61 | ni-mail | NI MAIL | NI郵件?
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| 62 | acas | ACA Services | 異步通
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| 63 | whois+ | whois+ | WHOIS+
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| 64 | covia | Communications Integrator (CI) | 通訊接口
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| 65 | tacacs-ds | TACACS-Database Service | TACACS數據庫服務
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| 66 | sql*net | Oracle SQL*NET | Oracle SQL*NET
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| 67 | bootps | Bootstrap Protocol Server | 引導程序協議服務端
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| 68 | bootpc | Bootstrap Protocol Client | 引導程序協議客戶端
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| 69 | tftp | Trivial File Transfer | 小型文件傳輸協議
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| 70 | gopher | Gopher | 信息檢索協議
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| 71 | netrjs-1 | Remote Job Service | 遠程作業服務
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| 72 | netrjs-2 | Remote Job Service | 遠程作業服務
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| 73 | netrjs-3 | Remote Job Service | 遠程作業服務
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| 74 | netrjs-4 | Remote Job Service | 遠程作業服務
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| 75 | ? | any private dial out service | 預留給個人撥出服務
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| 76 | deos | Distributed External Object Store | 分佈式外部對像存儲
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| 77 | ? | any private RJE service | 預留給個人遠程作業輸入服務
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| 78 | vettcp | vettcp | 修正TCP?
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| 79 | finger | Finger | FINGER(查詢遠程主機在線用戶等信息)
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| 80 | http | World Wide Web HTTP | 全球信息網超文本傳輸協議
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| 81 | hosts2-ns | HOSTS2 Name Server | HOST2名稱服務
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| 82 | xfer | XFER Utility | 傳輸實用程序
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| 83 | mit-ml-dev | MIT ML Device | 模塊化智能終端ML設備
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| 84 | ctf | Common Trace Facility | 公用追蹤設備
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| 85 | mit-ml-dev | MIT ML Device | 模塊化智能終端ML設備
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| 86 | mfcobol | Micro Focus Cobol | Micro Focus Cobol編程語言
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| 87 | ? | any private terminal link | 預留給個人終端連接
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| 88 | kerberos | Kerberos | Kerberros安全認證系統
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| 89 | su-mit-tg | SU/MIT Telnet Gateway | SU/MIT終端仿真網關
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| 90 | dnsix | DNSIX Securit Attribute Token Map | DNSIX 安全屬性標記圖
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| 91 | mit-dov | MIT Dover Spooler | MIT Dover假脫機
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| 92 | npp | Network Printing Protocol | 網絡打印協議
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| 93 | dcp | Device Control Protocol | 設備控制協議
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| 94 | objcall | Tivoli Object Dispatcher | Tivoli對像調度
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| 95 | supdup | SUPDUP |
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| 96 | dixie | DIXIE Protocol Specification | DIXIE協議規範
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| 97 | swift-rvf | Swift Remote Virtural File Protocol | 快速遠程虛擬文件協議
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| 98 | tacnews | TAC News | TAC(東京大學自動計算機?)新聞協議
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