什么是端口号？
端口号是 16 位无符号整数（0-65535），用于标识网络设备上的进程或服务，让多个网络服务共用同一 IP 地址。
系统端口（0-1023）：
也称“知名端口”，保留给 HTTP (80)、HTTPS (443)、SSH (22) 等常见服务
注册端口（1024-49151）：
由在 IANA 注册的应用程序和服务使用，如 MySQL (3306)、PostgreSQL (5432)
动态端口（49152-65535）：
也称“临时端口”，由客户端应用用于临时连接
端口号查询
搜索和浏览常见网络端口号
搜索与筛选
按端口号或服务搜索，并通过分类缩小范围
端口
共 176 个匹配端口
| 端口 | 服务 | 协议 | 描述 |
|---|---|---|---|
| 1 | TCPMUX | TCP | TCP Port Service Multiplexer |
| 7 | Echo | TCP/UDP | Echo Protocol |
| 9 | Discard | TCP/UDP | Discard Protocol |
| 13 | Daytime | TCP/UDP | Daytime Protocol |
| 17 | QOTD | TCP/UDP | Quote of the Day |
| 19 | Chargen | TCP/UDP | Character Generator |
| 20 | FTP-DATA常用 | TCP | FTP Data Transfer |
| 21 | FTP常用 | TCP | FTP Control |
| 22 | SSH常用 | TCP | Secure Shell |
| 23 | Telnet常用 | TCP | Telnet Protocol |
| 25 | SMTP常用 | TCP | Simple Mail Transfer Protocol |
| 37 | Time | TCP/UDP | Time Protocol |
| 42 | WINS | TCP/UDP | Windows Internet Name Service |
| 43 | WHOIS | TCP | WHOIS Protocol |
| 49 | TACACS | TCP/UDP | Terminal Access Controller Access-Control System |
| 53 | DNS常用 | TCP/UDP | Domain Name System |
| 67 | DHCP Server常用 | UDP | Dynamic Host Configuration Protocol Server |
| 68 | DHCP Client常用 | UDP | Dynamic Host Configuration Protocol Client |
| 69 | TFTP | UDP | Trivial File Transfer Protocol |
| 70 | Gopher | TCP | Gopher Protocol |
| 79 | Finger | TCP | Finger Protocol |
| 80 | HTTP常用 | TCP | Hypertext Transfer Protocol |
| 88 | Kerberos | TCP/UDP | Kerberos Authentication |
| 109 | POP2 | TCP | Post Office Protocol v2 |
| 110 | POP3常用 | TCP | Post Office Protocol v3 |
| 111 | RPC | TCP/UDP | Remote Procedure Call |
| 113 | Ident | TCP | Identification Protocol |
| 115 | SFTP | TCP | Simple File Transfer Protocol |
| 118 | SQL Services | TCP/UDP | SQL Services |
| 119 | NNTP | TCP | Network News Transfer Protocol |
| 123 | NTP常用 | UDP | Network Time Protocol |
| 135 | EPMAP | TCP/UDP | Microsoft EPMAP (RPC) |
| 137 | NetBIOS-NS | UDP | NetBIOS Name Service |
| 138 | NetBIOS-DGM | UDP | NetBIOS Datagram Service |
| 139 | NetBIOS-SSN | TCP | NetBIOS Session Service |
| 143 | IMAP常用 | TCP | Internet Message Access Protocol |
| 161 | SNMP常用 | UDP | Simple Network Management Protocol |
| 162 | SNMP Trap | UDP | SNMP Trap |
| 179 | BGP | TCP | Border Gateway Protocol |
| 194 | IRC | TCP | Internet Relay Chat |
| 201 | AppleTalk | TCP/UDP | AppleTalk Routing Maintenance |
| 264 | BGMP | TCP/UDP | Border Gateway Multicast Protocol |
| 318 | TSP | TCP/UDP | Time Stamp Protocol |
| 389 | LDAP常用 | TCP | Lightweight Directory Access Protocol |
| 443 | HTTPS常用 | TCP | HTTP Secure |
| 445 | SMB常用 | TCP | Server Message Block |
| 464 | Kerberos Change | TCP/UDP | Kerberos Password Change |
| 465 | SMTPS常用 | TCP | SMTP over SSL |
| 500 | IKE | UDP | Internet Key Exchange (IPsec) |
| 512 | rexec | TCP | Remote Execution |
使用方法
输入编号、名称或说明关键词，并选择分类筛选。翻页可查看全部匹配