38
ADMINISTRATION
PREVENT CALLS FROM INVALID NUMBERS
Prevent calls from invalid numbers to enhance security, especially if users can gain access
to Konftel CC200 from public networks. Preventing such calls blocks hackers from at-
tacking your SIP and H.323–based networks.
You can prevent calls from invalid numbers separately for each network interface if
Konftel CC200 is not registered to:
•
A SIP server, incoming SIP-based calls using IP addresses are rejected. Calls must be
established using:
•
The user@host syntax.
•
The host##user syntax where host is the Konftel CC200 IP address and user is
the SIP user name.
•
A gatekeeper, incoming H323–based calls using IP addresses are rejected. Calls must
be established using:
•
The alias@host syntax.
•
The host##alias syntax where host is the Konftel CC200 IP address and alias is
the H.323 alias.
From the Konftel CC200 GUI
From the Konftel CC200 GUI
Click
Configure
( )
.
Click
Advanced
.
•
Konftel CC200 prompts you to enter a PIN. The default PIN is
1234
.
Click
Protocols
.
Click
General
.
Select
Yes
for the following fields:
•
Reject SIP invalid number calls
•
Reject H.323 invalid number calls
From the web interface
From the web interface
Click
Administrator Settings
.
Click
Protocols
>
General
.
Select
Yes
for the following fields:
•
Reject SIP invalid number calls
•
Reject H.323 invalid number calls
Click
Save
.