44 AXIS 231D+/232D+ - System OptionsAlternative HTTP port - Select this option to manually define an external HTTP port. Enterthe port number in the field provided. If no port is entered here a port number willautomatically be selected when NAT traversal is enabled.Notes: • An alternative HTTP port can be used/be active even if NAT traversal is disabled. This is useful if e.g. yourNAT router does not support UPnP and you need to manually configure port forwarding in the NAT router.• If you attempt to manually enter a port that is already in use, another available port will automatically beselected.• When the port is selected automatically it will be displayed in this field. This can be changed by entering anew port number and clicking Save.RTSPThe RTSP protocol allows a connecting client to start an MPEG-4 stream. Enter the RTSPport number to use. The default setting is 554.FTPThe FTP server running in the AXIS 231D+/232D+ enables the upload of e.g. newfirmware, user applications, etc. Check the box to enable the service.Network TrafficThe default setting is Auto-negotiate which means that the correct speed is automaticallyselected. If necessary, you can set the connection speed by selecting it from the drop-downlist.Maximum bandwidth - Specify, in Mbit/s or kbit/s, the maximum bandwidth that thenetwork camera is allowed to use on your network. This is a useful function whenconnecting your network camera to busy or heavily loaded networks. The default setting isUnlimited.Note: When using MPEG-4 as the video format, remember that setting a maximum bandwidth value here maycreate problems for individual video streams if the maximum value is less than the sum of the bit rates setfor the video streams.For more information, please see the online helpSOCKSSOCKS is a networking proxy protocol. The AXIS 231D+/232D+ can be configured to use aSOCKS server to reach networks on the other side of a firewall/proxy server. Thisfunctionality is useful if the AXIS 231D+/232D+ is located on a local network behind afirewall, but notifications, uploads, alarms, etc., need to be sent to a destination outside thelocal network (e.g. to the Internet).