Is port 3868 (Diameter Protocol) dangerous?

Port 3868 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 3868 be open on my firewall?

Port 3868 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 3868 use?

Port 3868 (Diameter Protocol) uses the TCP/UDP transport protocol and falls under the Security & VPN category.

:3868 (TCP/UDP)

Diameter Protocol

Medium Risk

TCP/UDP — Security & VPN

Port Overview

Port Number 3868

Service Name Diameter Protocol

Transport Protocol TCP/UDP

Category Security & VPN

Security Risk Medium

Port Range Registered (1024-49151)

What is Port 3868?

Port 3868 is the standard port for the Diameter protocol, the successor to RADIUS used for authentication, authorization, and accounting (AAA) in telecommunications and 4G/LTE networks. Mobile network operators use Diameter for authentication of subscribers and policy control. It is a core protocol in the 3GPP standards for LTE/EPC network architecture.

TCP/UDP Security & VPN

Security Considerations

Port 3868 (Diameter Protocol) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.

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