Is port 1524 (Ingreslock) dangerous?

Port 1524 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 1524 be open on my firewall?

No, port 1524 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 1524 use?

Port 1524 (Ingreslock) uses the TCP transport protocol and falls under the Security & VPN category.

:1524 (TCP)

Ingreslock

Critical Risk

TCP — Security & VPN

Port Overview

Port Number 1524

Service Name Ingreslock

Transport Protocol TCP

Category Security & VPN

Security Risk Critical

Port Range Registered (1024-49151)

What is Port 1524?

Port 1524 is associated with the Ingreslock backdoor, historically left open by some attackers after compromising systems. It was originally assigned to the Ingres database lock manager. This port is often flagged in security scans as a potential indicator of compromise.

TCP Security & VPN

Security Considerations

Port 1524 (Ingreslock) is classified as critical risk. This port should not be exposed to the public internet. The service transmits data without encryption, making it vulnerable to eavesdropping, credential theft, and man-in-the-middle attacks.

Recommendation: Block this port at the firewall. Use encrypted alternatives (SSH, SFTP, HTTPS) instead.

Related Ports — Security & VPN

31 MSG-AUTH 48 Auditd 49 TACACS 56 XNS-AUTH 62 ACA Services 65 TACACS-DS 88 Kerberos 90 DNSIX Security

Related Terms

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS