User`s manual

VoIP/(802.11g) ADSL2+ (VPN) Firewall Router
Chapter 4: Configuration
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Error Log
Any errors encountered by the router (e.g. invalid names given to entries) are logged to this window.
NAT Sessions
This section lists all current NAT sessions between interface of types external (WAN) and internal (LAN).
Diagnostic
Tests the connection to computers that are connected to LAN ports and also the WAN Internet connection.
If PING www.google.com shows FAIL and the other tests show PASS, you should check that the DNS
setting is correct.