CounterPath eyeBeam 1.11 User Guide for Windows - Manual (Page 41)

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7. If the result is could not find host, or request timeout, that computer is not available. Please
contact the appropriate VoIP service provider for assistance.
How to ping a computer (Mac OS X):
1. Launch the Network Utility found in the Applications/Utilities folder.
2. Click on Ping from the list at the top.
3. Enter the address of the computer and click Ping.
Firewall and NAT issues
If a user computer is behind a firewall, certain ports must be open for eyeBeam to be able to
communicate with a VoIP service provider. The required ports are listed below in Table 4. Please
refer to applicable firewall documentation for help on opening ports.
Table 4: Standard Ports
Two additional ports after 8001 are required for each additional line used. For example, if using a
second line, UDP ports 8002-3 are used.
If the user computer is behind a firewall from which it is impossible to open such ports, contact
the VoIP service provider regarding firewall traversal solutions such as X-Tunnels.
If the firewall restricts incoming connections, the user may need to use an Outbound Proxy to
properly receive audio. Ask the VoIP service provider for a Outbound Proxy address and port
number, then enter those values into eyeBeam in the following location:
Settings Menu -> Proxies -> [User’s SIP Proxy] -> <Outbound Proxy>:<Port>
Users must also set the Use Outbound Proxy field (found with the above setting) to Always.
Port forwarding is not required on a user’s NAT.
Port Type and Number Service
UDP 3478 STUN
UDP 5060 SIP
UDP 8000 RTP
UDP 8001 RTCP