
Summary of Network Ports for Virtual CAS (vCAS) Installation
The following table summarizes all ports that might be used for a vCAS installation. See for ports that are required for basic system operation.
Protocol Ports Source Destination Function Configurable Optional
TCP 22 HP Remote
Access
Connectivity
System
(RACS)
Virtual CAS SSH Tunnel Yes Required
TCP 443 Customer's
Web
Browser
Virtual CAS HTTPS port for web UI for managing
Virtual CAS
No Required
UDP 53 Virtual CAS DNS Server Domain Name Service (DNS) - Host
name resolution
No Required
UDP 123 Virtual CAS Network Time Server Network Time Protocol No Recommended
TCP 80 or web
proxy port
Virtual CAS onsitecrl.verisign.com or
Web Proxy
HTTP (Unencrypted) Daily fetch of HP
Class 2 CA certificate revocation list
(CRL)
No Recommended
TCP 80 Virtual CAS onsite-ocsp.verisign.com OCSP (Online Certificate Status
Protocol) for certificate revocation check
No Recommended
TCP 443 or web
proxy port
Virtual CAS h20529.www2.hp.com or
Web Proxy
HTTPS connection to the HP RDA CAS
Kit server to download updates
No Recommended
TCP 22 Customer's
SSH Client
Virtual CAS SSH command-line access for Virtual
CAS management
No Optional
TCP 25 Virtual CAS Customer-Designated
SMTP Server
Email notifications No Optional
Table 2.1 vCAS Connectivity - Firewall/Port Requirements
Page 10 of 65HP Remote Device Access 8.1:vCAS User Guide
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