Is port 37777 (Dahua DVR TCP) dangerous?

Port 37777 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 37777 be open on my firewall?

No, port 37777 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 37777 use?

Port 37777 (Dahua DVR TCP) uses the TCP transport protocol and falls under the Other category.

:37777 (TCP)

Dahua DVR TCP

Critical Risk

TCP — Other

Port Overview

Port Number 37777

Service Name Dahua DVR TCP

Transport Protocol TCP

Category Other

Security Risk Critical

Port Range Registered (1024-49151)

What is Port 37777?

Default TCP client access port for Dahua brand DVR, NVR, and IP camera systems. Used by Dahua's proprietary client software (SmartPSS, DSS) for remote viewing and management. Heavily targeted in botnet and vulnerability scanning campaigns.

TCP Other Commonly Used

Security Considerations

Port 37777 (Dahua DVR TCP) 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 — Other

35 Private Printer Server 43 WHOIS 63 Whois++ 75 Private Dial-Out Service 78 VetTCP 91 MIT-DOV 92 NPP 104 DICOM

Related Terms

ASN BGP Hijack Data Center Domain Name Dual Stack Internet Exchange Point (IXP)