ZyXEL Communications USG40 User Manual page 699

The data rates through my cellular connection are no-where near the rates I expected.
The actual cellular data rate you obtain varies depending on the cellular device you use, the signal
strength to the service provider's base station, and so on.
I created a cellular interface but cannot connect through it.
• Make sure you have a compatible mobile broadband device installed or connected. See
www.zyxel.com for details.
• Make sure you have the cellular interface enabled.
• Make sure the cellular interface has the correct user name, password, and PIN code configured
with the correct casing.
• If the ZyWALL/USG has multiple WAN interfaces, make sure their IP addresses are on different
subnets.
Hackers have accessed my WEP-encrypted wireless LAN.
WEP is extremely insecure. Its encryption can be broken by an attacker, using widely-available
software. It is strongly recommended that you use a more effective security mechanism. Use the
strongest security mechanism that all the wireless devices in your network support. WPA2 or WPA2-
PSK is recommended.
The wireless security is not following the re-authentication timer setting I specified.
If a RADIUS server authenticates wireless stations, the re-authentication timer on the RADIUS
server has priority. Change the RADIUS server's configuration if you need to use a different re-
authentication timer setting.
I cannot configure a particular VLAN interface on top of an Ethernet interface even though I
have it configured it on top of another Ethernet interface.
Each VLAN interface is created on top of only one Ethernet interface.
The ZyWALL/USG is not applying an interface's configured ingress bandwidth limit.
At the time of writing, the ZyWALL/USG does not support ingress bandwidth management.
Chapter 39 Troubleshooting
ZyWALL/USG Series User's Guide
699