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網路連接埠列表

免費網路連接埠列表——涵蓋從基礎到進階的完整指令和語法參考資源。結構化分類便於快速查詢,每個條目搭配實用範例和詳細使用說明,適合開發者日常查閱。適合專業人士與一般使用者,隨時隨地在任何裝置上使用。完全免費,無使用次數限制,不添加浮水印。介面簡潔直觀,無需任何技術背景即可輕鬆操作。

Search Ports

118 ports found
0
Reserved
TCP/UDP
InfoSystem

Reserved — not assignable. Used for OS-level signaling.

20
FTP Data
TCP
HighFile Transfer

File Transfer Protocol data channel for active mode transfers.

Unencrypted data. Use SFTP (port 22) or FTPS instead.
21
FTP Control
TCP
CriticalFile Transfer

File Transfer Protocol command channel. Sends credentials in plain text.

Sends passwords unencrypted. Common target for brute-force attacks.
22
SSH
TCP
MediumRemote Access

Secure Shell — encrypted remote login, file transfer (SFTP/SCP), and tunneling.

Secure but heavily targeted. Use key-based auth and fail2ban.
23
Telnet
TCP
CriticalRemote Access

Unencrypted remote terminal protocol. All data including passwords sent in cleartext.

Never use on untrusted networks. Replace with SSH.
25
SMTP
TCP
HighMail

Simple Mail Transfer Protocol — server-to-server email relay.

Often blocked by ISPs. Commonly abused for spam relay.
53
DNS
TCP/UDP
MediumSystem

Domain Name System — resolves domain names to IP addresses.

UDP for queries, TCP for zone transfers. DNS amplification attacks are common.
67
DHCP Server
UDP
LowSystem

Dynamic Host Configuration Protocol — server listens for client requests.

68
DHCP Client
UDP
LowSystem

Dynamic Host Configuration Protocol — client receives IP configuration.

69
TFTP
UDP
HighFile Transfer

Trivial File Transfer Protocol — simple, unauthenticated file transfers.

No authentication. Used for firmware updates and PXE booting.
80
HTTP
TCP
MediumWeb

Hypertext Transfer Protocol — unencrypted web traffic.

All data visible in transit. Always redirect to HTTPS (443).
88
Kerberos
TCP/UDP
MediumSecurity/VPN

Network authentication protocol used in Active Directory environments.

110
POP3
TCP
HighMail

Post Office Protocol v3 — retrieves email from server (unencrypted).

Sends credentials in plain text. Use POP3S (995) instead.
111
RPCBind
TCP/UDP
HighSystem

SunRPC portmapper — maps RPC program numbers to ports.

Should never be exposed to the internet.
123
NTP
UDP
LowSystem

Network Time Protocol — clock synchronization across networks.

NTP amplification attacks possible if misconfigured.
135
MS-RPC
TCP
CriticalSystem

Microsoft RPC Endpoint Mapper. Gateway to Windows services.

Major attack surface. Block from the internet.
137
NetBIOS Name
UDP
HighSystem

NetBIOS Name Service — Windows network name resolution.

Leaks system info. Block from the internet.
138
NetBIOS Datagram
UDP
HighSystem

NetBIOS Datagram Service — Windows browser elections and announcements.

139
NetBIOS Session
TCP
CriticalFile Transfer

NetBIOS Session Service — file and printer sharing over NetBIOS.

Legacy SMB. Replace with SMB over TCP (445) and restrict access.
143
IMAP
TCP
HighMail

Internet Message Access Protocol — email retrieval with server-side management.

Unencrypted. Use IMAPS (993) instead.
161
SNMP
UDP
HighSystem

Simple Network Management Protocol — monitor and manage network devices.

v1/v2c use community strings (passwords) in cleartext. Use SNMPv3.
162
SNMP Trap
UDP
MediumSystem

SNMP trap messages — asynchronous notifications from network devices.

179
BGP
TCP
CriticalSystem

Border Gateway Protocol — internet routing between autonomous systems.

BGP hijacking can redirect internet traffic. Critical infrastructure.
389
LDAP
TCP/UDP
HighSecurity/VPN

Lightweight Directory Access Protocol — directory services (Active Directory).

Use LDAPS (636) for encryption. Credential theft risk over plain LDAP.
443
HTTPS
TCP
LowWeb

HTTP over TLS — encrypted web traffic. The standard for secure websites.

445
SMB
TCP
CriticalFile Transfer

Server Message Block — Windows file/printer sharing and AD communication.

Target of WannaCry/EternalBlue (MS17-010). Never expose to the internet.
464
Kerberos Change
TCP/UDP
MediumSecurity/VPN

Kerberos password change protocol.

465
SMTPS
TCP
LowMail

SMTP over implicit TLS — encrypted email submission.

500
IKE (IPSec)
UDP
LowSecurity/VPN

Internet Key Exchange — IPSec VPN tunnel negotiation.

514
Syslog
UDP
LowSystem

System logging protocol — centralized log collection from network devices.

548
AFP
TCP
MediumFile Transfer

Apple Filing Protocol — macOS file sharing.

587
SMTP Submission
TCP
LowMail

Email submission with STARTTLS — the recommended port for sending email.

631
IPP/CUPS
TCP
MediumSystem

Internet Printing Protocol / CUPS print server.

636
LDAPS
TCP
LowSecurity/VPN

LDAP over SSL/TLS — encrypted directory services.

853
DNS over TLS
TCP
LowSystem

Encrypted DNS queries over TLS (DoT).

873
Rsync
TCP
MediumFile Transfer

Rsync file synchronization daemon.

990
FTPS
TCP
LowFile Transfer

FTP over TLS — encrypted file transfer.

993
IMAPS
TCP
LowMail

IMAP over SSL/TLS — encrypted email retrieval.

995
POP3S
TCP
LowMail

POP3 over SSL/TLS — encrypted email download.

1080
SOCKS Proxy
TCP
MediumWeb

SOCKS proxy protocol — application-level proxy routing.

1194
OpenVPN
UDP
LowSecurity/VPN

OpenVPN — widely deployed open-source VPN solution.

1433
MS SQL Server
TCP
HighDatabase

Microsoft SQL Server default instance. Enterprise database.

Never expose directly. Use VPN or SSH tunneling.
1434
MS SQL Browser
UDP
HighDatabase

SQL Server Browser service — resolves named instances to ports.

1521
Oracle DB
TCP
HighDatabase

Oracle Database TNS Listener — default database connection port.

Common target for TNS poisoning attacks.
1723
PPTP
TCP
CriticalSecurity/VPN

Point-to-Point Tunneling Protocol — legacy VPN. Broken encryption.

MS-CHAPv2 is cracked. Migrate to WireGuard or OpenVPN.
1812
RADIUS Auth
UDP
MediumSecurity/VPN

Remote Authentication Dial-In User Service — network access control.

1813
RADIUS Acct
UDP
LowSecurity/VPN

RADIUS accounting — usage tracking for network access.

1883
MQTT
TCP
MediumIoT

Message Queuing Telemetry Transport — lightweight IoT messaging protocol.

Unencrypted by default. Use 8883 for MQTT over TLS.
1900
SSDP/UPnP
UDP
HighIoT

Simple Service Discovery Protocol for Universal Plug and Play.

UPnP can expose internal services. Disable on routers.
2049
NFS
TCP/UDP
HighFile Transfer

Network File System — Unix/Linux network file sharing.

Misconfigured exports can leak sensitive data.
2181
ZooKeeper
TCP
HighDevOps

Apache ZooKeeper — distributed coordination service.

Often lacks authentication. Exposes cluster metadata.
2375
Docker (unencrypted)
TCP
CriticalDevOps

Docker daemon REST API without TLS. Grants root-level access.

Full host compromise if exposed. Always use 2376 with TLS.
2376
Docker (TLS)
TCP
MediumDevOps

Docker daemon REST API with TLS client authentication.

2379
etcd
TCP
CriticalDevOps

etcd client API — distributed key-value store used by Kubernetes.

Contains all cluster secrets. Never expose.
3000
Grafana / Dev Servers
TCP
MediumDevOps

Grafana dashboard default port. Also common for Node.js/React dev servers.

3128
Squid Proxy
TCP
MediumWeb

Squid web proxy cache default port.

3306
MySQL / MariaDB
TCP
HighDatabase

MySQL and MariaDB database server default port.

Never expose to the internet. Use SSH tunnels or VPN.
3389
RDP
TCP/UDP
CriticalRemote Access

Remote Desktop Protocol — Windows remote access.

Top target for brute-force and ransomware. Use NLA and VPN.
3478
STUN/TURN
TCP/UDP
LowMedia/VoIP

NAT traversal for WebRTC and VoIP applications.

4222
NATS
TCP
MediumMessaging

NATS messaging system — lightweight cloud-native messaging.

4369
Erlang EPMD
TCP
HighDevOps

Erlang Port Mapper Daemon — service discovery for Erlang nodes.

4500
IPSec NAT-T
UDP
LowSecurity/VPN

IPSec NAT Traversal — VPN through NAT gateways.

4646
Nomad HTTP
TCP
HighDevOps

HashiCorp Nomad HTTP API — workload orchestration.

5060
SIP
TCP/UDP
MediumMedia/VoIP

Session Initiation Protocol — voice/video call signaling (VoIP).

5061
SIP TLS
TCP
LowMedia/VoIP

SIP over TLS — encrypted VoIP signaling.

5222
XMPP Client
TCP
LowMessaging

Extensible Messaging and Presence Protocol — real-time communication.

5269
XMPP Server
TCP
MediumMessaging

XMPP server-to-server federation protocol.

5353
mDNS
UDP
LowSystem

Multicast DNS — zero-configuration local network name resolution.

5432
PostgreSQL
TCP
HighDatabase

PostgreSQL database server default port.

Ensure pg_hba.conf restricts access. Never expose directly.
5672
RabbitMQ AMQP
TCP
MediumMessaging

RabbitMQ message broker — AMQP protocol.

5683
CoAP
UDP
MediumIoT

Constrained Application Protocol — IoT web transfer protocol.

5684
CoAP DTLS
UDP
LowIoT

CoAP over DTLS — encrypted IoT communication.

5900
VNC
TCP
CriticalRemote Access

Virtual Network Computing — remote desktop sharing.

Weak default security. Many versions have no encryption.
5901
VNC Display :1
TCP
HighRemote Access

VNC server display 1 (base 5900 + display number).

5984
CouchDB
TCP
HighDatabase

Apache CouchDB HTTP API — document-oriented NoSQL database.

6379
Redis
TCP
CriticalDatabase

Redis in-memory data store. Used as cache, message broker, and database.

No auth by default. Major source of data breaches when exposed.
6443
Kubernetes API
TCP
CriticalDevOps

Kubernetes API server — cluster management and orchestration.

Exposed API servers grant full cluster control.
6660
IRC Range Start
TCP
MediumMessaging

IRC server common port range (6660-6669).

6667
IRC
TCP
MediumMessaging

Internet Relay Chat — unencrypted real-time messaging.

6697
IRC TLS
TCP
LowMessaging

IRC over TLS — encrypted real-time messaging.

7000
Cassandra Internode
TCP
MediumDatabase

Cassandra inter-node cluster communication.

7474
Neo4j HTTP
TCP
HighDatabase

Neo4j graph database browser and REST API.

7687
Neo4j Bolt
TCP
MediumDatabase

Neo4j Bolt binary protocol for queries.

8000
HTTP Alt / Dev
TCP
MediumWeb

Common development server port (Django, Python HTTP).

8080
HTTP Proxy
TCP
MediumWeb

Common alternative HTTP port. Used for proxies, dev servers, and admin panels.

8081
Jenkins / App Server
TCP
MediumDevOps

Common port for Jenkins CI, application servers, and admin panels.

8086
InfluxDB
TCP
MediumDatabase

InfluxDB time-series database HTTP API.

8089
Splunk Management
TCP
HighDevOps

Splunk REST API and management port.

8123
ClickHouse HTTP
TCP
MediumDatabase

ClickHouse column-oriented OLAP database HTTP interface.

8200
Vault
TCP
HighSecurity/VPN

HashiCorp Vault — secrets management and encryption.

Contains all secrets. Ensure TLS and proper ACLs.
8443
HTTPS Alt
TCP
LowWeb

Alternative HTTPS port. Common for admin UIs and application servers.

8500
Consul
TCP
HighDevOps

HashiCorp Consul HTTP API — service discovery and configuration.

8600
Consul DNS
TCP/UDP
MediumDevOps

Consul DNS interface for service discovery.

8883
MQTT TLS
TCP
LowIoT

MQTT over TLS — encrypted IoT messaging.

8888
Jupyter Notebook
TCP
HighDevOps

Jupyter Notebook default port — interactive computing.

Often runs without authentication. Code execution risk.
8929
GitLab Mattermost
TCP
LowDevOps

GitLab integrated Mattermost messaging port.

9000
ClickHouse Native
TCP
MediumDatabase

ClickHouse native TCP interface / also common for various apps.

9042
Cassandra CQL
TCP
HighDatabase

Apache Cassandra CQL native transport — distributed NoSQL database.

9050
Tor SOCKS
TCP
MediumSecurity/VPN

Tor network SOCKS proxy for anonymous browsing.

9051
Tor Control
TCP
HighSecurity/VPN

Tor control port for managing the Tor daemon.

9090
Prometheus
TCP
MediumDevOps

Prometheus monitoring server — metrics collection and alerting.

9092
Apache Kafka
TCP
MediumMessaging

Apache Kafka distributed event streaming platform.

9200
Elasticsearch
TCP
CriticalDatabase

Elasticsearch HTTP API — search and analytics engine.

No authentication by default in older versions. Data breaches common.
9300
Elasticsearch Transport
TCP
HighDatabase

Elasticsearch internal cluster communication.

9418
Git
TCP
MediumDevOps

Git daemon protocol — unauthenticated read-only Git access.

9997
Splunk Forwarder
TCP
MediumDevOps

Splunk universal forwarder data input.

10161
SNMP over TLS
TCP
LowSystem

Secure SNMP over DTLS — encrypted network management.

10250
Kubelet
TCP
HighDevOps

Kubelet API — node-level container management in Kubernetes.

11211
Memcached
TCP/UDP
CriticalDatabase

Memcached distributed caching system.

UDP reflection attacks caused 1.3 Tbps DDoS in 2018. Disable UDP.
15672
RabbitMQ Management
TCP
HighMessaging

RabbitMQ web management console.

Default credentials guest/guest. Change immediately.
25565
Minecraft
TCP
LowGaming

Minecraft Java Edition server default port.

27015
Source Engine
UDP
LowGaming

Valve Source engine game server (CS:GO, TF2, etc).

27017
MongoDB
TCP
CriticalDatabase

MongoDB NoSQL database default port.

Historically no auth by default. Thousands of exposed instances breached.
27018
MongoDB Shard
TCP
HighDatabase

MongoDB shard server (shardsvr) default port.

32400
Plex Media
TCP
LowMedia/VoIP

Plex Media Server web interface and streaming.

41641
Tailscale
UDP
LowSecurity/VPN

Tailscale WireGuard-based mesh VPN direct connections.

50000
Jenkins Agent
TCP
HighDevOps

Jenkins JNLP agent communication port.

51820
WireGuard
UDP
LowSecurity/VPN

WireGuard VPN — modern, fast, cryptographically sound VPN tunnel.

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使用方法

按照以下步驟使用網路連接埠列表:

  1. 準備輸入:在輸入區域輸入資料,或將檔案拖曳至上傳區域。工具支援多種輸入方式以適應不同使用場景
  2. 設定選項:根據需要調整處理參數和輸出格式。工具提供合理的預設值,適用於大多數常見使用場景
  3. 執行處理:點擊處理按鈕開始操作——處理在瀏覽器中即時完成,結果立即顯示在輸出區域
  4. 檢查結果:確認處理結果符合預期。如需調整,可修改參數後重新執行處理
  5. 匯出結果:複製結果到剪貼簿或下載為檔案。支援多種輸出格式選擇,滿足不同的後續使用需求

網路連接埠列表完全在瀏覽器中運作——您的資料不會上傳至任何伺服器或雲端服務。處理引擎經過效能最佳化,可在桌面電腦、平板電腦和手機等各種裝置上提供流暢的使用體驗。無需安裝軟體、無需註冊帳號,開啟瀏覽器即可立即使用。

關於此工具

網路連接埠列表是 DevToolkit 線上工具集的一部分,專為提供高效、安全、便利的數位處理體驗而設計。工具完全在您的瀏覽器中運作,利用現代 Web 技術(JavaScript、Canvas API、Web Crypto API、WebAssembly)提供接近原生桌面應用程式的處理能力和回應速度。

隱私是我們的核心設計原則。所有資料處理在您的裝置本機完成,不會傳送至任何外部伺服器或雲端服務。沒有使用者追蹤、沒有資料收集、沒有帳號要求。您可以安心處理任何敏感資料,包括商業機密、個人文件和尚未發布的內容。

工具介面採用直覺的設計原則——常用功能一目了然,進階選項按需展開。支援桌面電腦、平板電腦和手機等所有裝置,響應式佈局確保在任何螢幕大小上都有最佳的操作體驗。使用現代瀏覽器(Chrome、Firefox、Safari、Edge)即可開始使用,無需安裝外掛程式。

為什麼使用此工具

選擇網路連接埠列表的理由:

  • 完全免費使用:所有功能永久免費——沒有隱藏費用、沒有使用次數限制、沒有浮水印、不需要註冊帳號
  • 隱私安全保障:所有處理在瀏覽器本機完成——不上傳任何資料至外部伺服器,適合處理敏感和機密內容
  • 即時處理速度:瀏覽器本機處理消除了網路傳輸延遲,輸入資料後立即獲得處理結果,提升工作效率
  • 跨平台使用:在 Windows、macOS、Linux 和行動裝置的現代瀏覽器中都能使用——無需安裝額外軟體或外掛程式
  • 專業級輸出:工具使用經過驗證的演算法和業界標準函式庫,輸出結果準確可靠可直接用於專業工作環境

DevToolkit 的設計理念是讓每個人都能免費使用專業工具。本機處理的架構確保您的資料安全,同時提供接近桌面應用的使用體驗。

常見問題

網路連接埠列表包含哪些類型的技術參考資訊?
網路連接埠列表提供結構化的技術參考資料,涵蓋常用的語法、指令和最佳實務。內容經過專業整理,以清晰的分類和搜尋功能幫助您快速找到所需資訊。資料定期更新以保持內容的時效性。
網路連接埠列表的參考內容是否包含實際使用範例?
是的——每個項目都附有實際的使用範例和詳細的說明文字。網路連接埠列表的範例涵蓋基礎和進階的不同用法。程式碼範例可一鍵複製,直接用於您的專案中。範例持續更新以反映最新的最佳實務。 連接埠資料庫包含 IANA 官方註冊和常見非官方用途。
如何在網路連接埠列表中快速找到需要的參考內容?
網路連接埠列表提供分類瀏覽、關鍵字搜尋和標籤篩選等多種查找方式。搜尋支援模糊匹配功能,即使記不清確切名稱也能找到。常用項目可加入書籤方便快速存取,顯著提升查閱效率。
網路連接埠列表的內容是否適合初學者閱讀學習?
適合——網路連接埠列表的內容從基礎概念到進階技巧循序漸進。每個項目都有簡明的描述和具體的使用場景。初學者可從基礎分類開始學習。同時也為有經驗的專業人員提供快速查閱參考的便利。
網路連接埠列表的參考資料準確性如何保證更新?
網路連接埠列表的內容基於官方文件和權威技術資源整理而成。定期與最新版本的規範和標準對照更新。社群回饋幫助及時發現和修正錯誤。涵蓋主流版本和相容性資訊,確保參考資料可靠。