The password is case sensitive with maximum length of 25 characters. The factory default password for End
User and administrator is “123” and “admin” respectively. Only an administrator can access the “ADVANCED
SETTING”, “Profile 1”, “Profile 2” and “FXS PORTs” configuration pages. Please reference the GUI pages using
the following link:
http://www.grandstream.com/sites/default/files/Resources/gxw400x_gui.zip.
Important Settings
The end-user must configure the following settings according to the local environment.
NOTE: Most settings on the web configuration pages are set to the default values.
NAT Settings
If you plan to keep the gateway within a private network behind a firewall, we recommend using STUN
Server. The following three (3) settings are useful in the STUN Server scenario:
1. STUN Server (under Advanced Settings webpage)
Enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN Server on the
internet and enter it on this field. If using Public IP, keep this field blank.
2. Use Random Ports (under Advanced Settings webpage)
It really depends on your network settings, so set this parameter to Yes or No, whichever works.
Generally, if you have multiple IP devices under the same network, it should be set to Yes. If using a
Public IP address, set this parameter to No.
3. NAT Traversal (under the Profile web pages)
Set this to Yes when gateway is behind firewall on a private network.
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