52AXIS 243SA - System options
Network - Advanced TCP/IP settings
DNS configuration
DNS (Domain Name Service) provides the translation of host names to IP addresses on your network.
Obtain DNS server address via DHCP - automatically use the DNS server settings provided by the DHCP server. Click the View button to see the current settings.
Use the following DNS server address - enter the desired DNS server by specifying the following:
Domain name - enter the domain(s) to search for the host name used by the Axis video server. Multiple domains can be separated by semicolons (;). The host name is always the first part of a Fully Qualified Domain Name, for example, myserver is the host name in the Fully Qualified Domain Name myserver.mycompany.com where mycompany.com is the Domain name.
DNS servers - enter the IP addresses of the primary and secondary DNS servers.
NTP Configuration
Obtain NTP server address via DHCP - use a DHCP server to automatically find an NTP server to synchronize clock of the Axis video server with the other devices on the network.
Use the following NTP server address - use the host name or IP address of a specific NTP server for time synchronization.
Host name configuration
The AXIS 243SA can be accessed using a host name, instead of an IP address. The host name is usually the same as the assigned DNS Name.
For more information, please see the online help 
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Link-Local IPv4 Address
This is enabled by default and assigns the AXIS 243SA an additional IP address for use with UPnP™. AXIS 243SA can have both a
HTTP
The default HTTP port number (80) can be changed to any port within the range
