Troubleshooting
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ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308
assigned domain name or workgroup name in the Domain Name field, and you might
have to enter additional information. For more information, see Manually Configure an
IPv4 Internet Connection on page 33.
•Your ISP allows only one Ethernet MAC address to connect to the Internet, and might
check for your computer’s MAC address. In this case, do one of the following:
-Inform your ISP that you have bought a new network device, and ask them to use the
VPN firewall’s MAC address.
-Configure your VPN firewall to spoof your computer’s MAC address. You can do this
in the Router’s MAC Address section on a WAN Advanced Options screen. For more
information, see Configure Advanced WAN Options and Other Tasks on page 67.
If your VPN firewall can obtain an IP address, but an attached computer is unable to load any
web pages from the Internet:
•Your computer might not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as
www.netgear.com) to numeric IP addresses. Typically your ISP provides the addresses of
one or two DNS servers for your use. You can configure your computer manually with
DNS addresses, as explained in your operating system documentation.
•Your computer might not have the VPN firewall configured as its TCP/IP gateway.
Troubleshooting the IPv6 Connection
If you have difficulty connecting over an IPv6 connection, there might be an incorrect
configuration on the VPN firewall or the computer from which you are trying to connect to the
VPN firewall:
Check the VPN firewall:
•By default, the VPN firewall is set to IPv4-only mode. Make sure that the VPN firewall is
set to IPv4/IPv6 mode (see Configure the IPv6 Routing Mode on page 52).
•Make sure that the ISP settings are correct (see Configure a Static IPv6 Internet
Connection on page 57). The VPN firewall cannot receive a valid IPv6 address if the
Internet connection is not correctly configured.
•Make sure that the VPN firewall can provide IPv6 addresses to the computers on the LAN
(see Manage the IPv6 LAN on page 97). Check the settings on the LAN Setup screen for
IPv6, and if applicable for your type of configuration, on the RADVD screen.
Check the computer:
•Make sure that the operating system supports IPv6. Normally, the following operating
systems support IPv6:
-Windows 7, all 32- and 64-bit versions
-Windows Vista, all 32- and 64-bit versions
-Windows XP Professional SP3 (32- and 64-bit)
-Windows Server 2008, all versions