IP helper is used to forward UDP requests from another subnet, this is typically used to forward DHCP requests. By default all L3 broadcasts are not forwarded. By default ip-helper will forward 8 broadcast types:
UDP SERVICE
PORT
___________________
37 NTP
49 TACACS
53 DNS
67 BOOTP Client
68 BOOTP Server
69 TFTP
137 NetBios
138 NetBios Datagram
My experience with Sonicwall is limited and I am not trying to insult anyone but I feel the devices are better suited in the SOHO environment as opposed to the enterprise environment.
