Vista needs some registry fixes before it will work with the Sonciwall TZ170 router. First, to fix an issue with wired interfaces and the Sonicwall:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\ArpRetryCount=0

Wireless interfaces are able to associate with the access point, but are unable to obtain an IP address. Vista shows this as “limited connectivity”. Make this change for each [...]