LifeSize Passport User Manual page 34

Controlling Remote Administration
By default, remote access to a LifeSize Passport system through the web (http), SNMP, and
ssh is enabled; remote access through a telnet session is disabled. To enable or disable
remote access through any of these mechanisms, configure preferences in Administrator
Preferences : Security : General.
Enabling H.235 AES Security
LifeSize Passport supports H.235 128-bit AES security using the Diffie Hellman key
exchange protocol in H.323 and H.460 calls. AES interoperability is supported with the third
party devices identified in the Release Notes on the Support page of www.lifesize.com.
To enable AES security, you must set the Administrator Preferences : Security :
General : H.235 AES Security preference to either Enabled or Strict. When set to Enabled,
calls connect, but are encrypted only if the far end supports AES encryption. When set to
Strict, calls do not connect if the far end does not support AES security.
Encrypted calls are indicated by encryption icons in the caller ID, Call Manager list, and Call
Statistics list. Refer to "Caller ID" on page 16 for a description of the icons.
Configuring Network Usage
To configure preferences that affect how your LifeSize system functions with other servers
and devices on your local network, access Administrator Preferences : Network :
General.
Note: LifeSize Passport cannot detect a change to its IP address if the change is due to a
change in networks from a wiring closet or through software, such as a change to a
router configuration. Reboot the LifeSize system if the DNS changes.
Specifying a Locally Configured IP Address
Dynamic Host Configuration Protocol (DHCP) is used to dynamically allocate and assign IP
addresses. DHCP allows you to move network devices from one subnet to another without
administrative attention. You can choose to enable DHCP if a DHCP server is present. If you
disable DHCP, you must enter an IP address (the locally configured IP address if not
assigned by a DHCP server), subnet mask (used to partition the IP address into a network
and host identifier), and gateway (IP address of the default gateway the system uses).
Configuring LifeSize Systems Using DHCP
If a LifeSize video communications system obtains its IP address using DHCP (the default),
it can accept an option from the DHCP server that specifies a location and file from which
the system can obtain configuration information. The file can be located on a web server,
34 LifeSize Passport User Guide