No Internet access for Mobile devices via wifi on eth3

[bertmaster]

I'm having a very strange issue. I have a 3rd interface that is handling DHCP for our guest wifi access. It has been working fine for months.

As of last week, mobile devices stopped being able to get to the Internet. They connect to the AP, get an IP address, but no internet access. Laptops connect fine, with internet access. This only seems to affect mobile devices, like smart phones and tablets.

If I manually configure a device with IP, default gateway, and dns...it connects fine with Internet access.

What I've determined is that the DHCP server on eth3 is handing out 192.168.0.1 as the default gateway when it should be handing out 192.168.4.1. I guess this is the issue because if I manually assign 192.168.4.1 as the default gateway, mobile devices work, but not with 192.168.0.1. However...Laptops work with the 0.1 gateway. Go figure...

Should there be a packet filter rule for DHCP on eth3? I don't see one.
Packet Filter Rules
User
Pass Accept DHCP eth3
System:
Allow DHCP Requests from internal interface
Accept DHCP traffic to the local DHCP client
Accept SNMP traffic from internal interfaces
Accept Open VPN traffic from all interfaces
Accept SSH traffic from all interfaces
Allow Ping on all interfaces
Block traffic to local server processes
Accept incoming VPN traffic when running as VPN Client
Route all bridge traffic

Also, under Routes I see an Active route that says, 192.168.4. with the Gateway as eth1.

For DHCP & DNS I have a custom field: dhcp-range=192.168.4.100,192.168.4.200,14400

Thanks in advance!

[bertmaster]

correction...statement edited.
Should there be a packet filter rule for DHCP on eth3? I don't see one.
Packet Filter Rules
User
Pass Accept DHCP eth1

The user rule is labeled as eth1 but is actually for eth3, which is the interface for 192.168.4.1

[bertmaster]

Still having this issue...Does anyone have any suggestions?
Thanks!