VLAN cannot connect to internet

VLAN 150 members cannot access the internet.  Members of VLAN 150 are on a layer 2 switch with all ports as access ports but port 24 which is trunked to the layer 3 switch.  Layer 3 has VLAN 150 added with IP address which is the default gateway of the clients in vlan 150.  I also have a default route on the layer 3 switch to the firewall.  I have tried to ping the firewall IP and it fails.  The interface is configured to allow ping.

Client IP on VLAN 150 Subnet DG
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it seems to be configured correctly. did you set the Vlan number on your firewall as well?
can you ping the Layer 3 switch or one of the client connected to it?
NytroZAuthor Commented:
I can ping other members on the layer3 switch as well as the switch.  VLAN 10 members which are on the layer 3 switch can access the internet and members of 150 can ping members of 10.
NytroZAuthor Commented:
The firewall is a Sonic Wall NSA 220.  It seems like traffic cannot find its way back from the firewall.  I look3ed t the logs and see the following:
Time    Date           ID      Category               Priority     Message               Source                                   Destination
1:55:14 Mar 30      23      Security Services      Alert      IP spoof dropped, 50515, X5, 53, X1      udp
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NytroZAuthor Commented:
Not sure I would set the vlan on the firewall yet but I definitely seems to be the issue.
you should cancel IDS/IPS on this zone, or just the ip spoof section..
see here:


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NytroZAuthor Commented:
he following link was also very helpful:

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