Installation and Setup
X-320M™ User's Manual
2.4.3 Hidden Network Settings
These settings are not graphically displayed on the default setup pages, but can be accessed by
manually typing the commands below into the URL bar of a web browser.
MTU Setting
To change the MTU, manually enter the advSetup.html (case sensitive) page into the address bar.
(http://192.168.1.2/advSetup.html). This new setup page will have a text box that will allow the MTU
to be changed. The valid range is 256 to 1476 bytes. MTU is a network parameter that stands for
Maximum Transmission Unit. This defines the max size, in bytes, of the TCP packets sent out from
the device. This normally can be left alone, but there are some circumstances where it might be
beneficial to change it. One of these circumstances is when the device is to be used over a VPN
(virtual private network). VPN's add extra information to TCP packets, if the new packets are too big
to physically travel across the network (greater than about 1500 bytes) then the packets will be split
up. This causes problems for some firewalls and those firewalls will just discard the packets. To fix
this, the MTU can be adjusted until the TCP packets do not get split up.
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