Is port 12345 (NetBus / Custom Apps) dangerous?

Port 12345 is classified as critical risk and should not be exposed to the public internet. It transmits data without encryption, making it vulnerable to eavesdropping and credential theft.

Should port 12345 be open on my firewall?

No, port 12345 should not be open to the public internet. Block it at the firewall and use encrypted alternatives such as SSH, SFTP, or HTTPS instead.

What transport protocol does port 12345 use?

Port 12345 (NetBus / Custom Apps) uses the TCP/UDP transport protocol and falls under the Security & VPN category.

:12345 (TCP/UDP)

NetBus / Custom Apps

Critical 风险

TCP/UDP — Security & VPN

端口概览

端口号 12345

服务名称 NetBus / Custom Apps

传输协议 TCP/UDP

类别 Security & VPN

安全风险 Critical

端口范围已注册 (1024-49151)

什么是端口 12345?

Historically associated with NetBus, an early remote administration and trojan tool from the late 1990s. Still flagged as suspicious in security scans when found open unexpectedly. Also used by various custom and development applications.

TCP/UDP Security & VPN

安全注意事项

端口12345（NetBus / Custom Apps）被归类为严重风险。此端口不应暴露在公网上。该服务在未加密的情况下传输数据，容易受到窃听、凭据窃取和中间人攻击。

建议：在防火墙处封锁此端口。改用加密替代方案（SSH、SFTP、HTTPS）。

NetBus / Custom Apps

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端口概览

什么是端口 12345?

安全注意事项

相关端口 — Security & VPN

相关术语