troubleshooting Question

Best network design and how to setup Sonicwall TZ00 and DSL modem

Avatar of stevenvel
stevenvelFlag for Australia asked on
RoutersWindows NetworkingHardware Firewalls
7 Comments1 Solution947 ViewsLast Modified:
Current setup:

SBS2003 Standard as domain controller (192.168.15.100). WAG54G2 DSL modem/router (192.168.15.1). Both working fine but plan is to upgrade server to new H/W and OS (SBS2011 Std) and add Sonicwall TZ200 with wireless.
The WAG54G2 is setup using PPPoE and performance is very average.
My plan is to leave the WAG54G2 with current setup because it's working and I don't want to interupt live network so I would like to use a spare device (Open Networks iConnect 625) with the sonicwall.
The server handles DHCP/DNS and this will have to stay the same.
I need a recommendation on best practice in this scenario and how setup the 625 and TZ200.
Do I need to setup the 625 in bridge mode and setup the sonicwall to handle NAT i.e. configure the sonicwall to connect to my ISP?
I prefer to use the same address scheme on LAN if possible so as to avoid having to re-configure the sever.
Please assume I have basic networking skills and provide clear/specific deatails like where to plug which cable.
i.e. The sonic wall has a Lan/XO port and a Wan/X1 port. Where should the Cat5 cable conenct from modem to TZ200? where should cable go from TZ200 to network switch?
Is there a different configuration that is recommended? i.e. use the 625 as gateway and port forward traffic to TZ200 which then port forwards to SBS?
Thank you in advance.
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