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i turned off dhcp on modem and NAT
i set opnsense to 192.168.1.254 with start of 192.168.1.2 and end of 192.168.1.254
i am able to ping anything inside the network.
i am also able to ping the modem at 70.63.227.238 (usable)
i cannot ping 70.63.227.237 (the gateway)
i cannot ping or dns 8.8.8.8
i cannot ping DNS servers at 209.18.47.61 and .62

Thank you. when you say clients should have firewall default gateway do you mean the 192.168.1.1?

i have a static ip for wan.70.63.227.238 and gateway of 70.63.227.337
mask of 255.255.255.252 /30
all my lan is on 192.186.1.x
I set lan to handle dhcp and wan to handle name servers
i want lan computers to talk out to internet
What configuration do you suggest using?
At this point i do not want to configure anything else until i can prove i can get to the internet.

Our facility has a spectum modem wtih the following configuration.
ARRIS Router
Host Name: ARRISGW
Routing Enabled
Wireless Disabled
Firewall IPSec Pass Through Enabled
Firewall PPTP Pass Through Enabled
Firewall L2tp Pass Through Enabled
LAN Settings
IP Address: 192.168.1.1
Subnet Mask 255.255.255.0
Enable DHCP server
Start IP Address 192.168.1.2
Ending IP Address 192.168.1.254
NAT Mode Route With NAT
UPNP Enabled
WAN Static Settings (You will not be able to see these from 192.168.1.1 browser)
Static Gateway IP 70.63.227.237
Static Useable IP 70.63.227.238
Static Subnet 255.255.255.252
Static DNS1 24.25.5.60
Static DNS2 24.25.5.61
WAN setup
DHCP enabled
IP Address 172.72.192.11
Subnet Mask 255.255.248.0
Gateway Address 172.72.192.1
Dynamic (IPV6)
DHCP Enabled
IP Address V6 2606:A000:DFC0:0:3010:EB7E:EFD0:EA06
Delegated Prefix 2606:A000:C1C6:ED00::
Delegate Prefix Length 56
IPV6 Gateway Address FE80::217:10FF:FE95:8A97

Called spectrum to change to bridged mode and no nat
set WAN on opnsense to:
ip 70.63.227.237, gateway 70.63.227.237, bit cont to 30 (225.225.225.252)
did not turn on dhcp
set LAN to 192.168.1.1, bit 24 (255.255.255.0)
range 192.168.1.2 to 192.168.1.254
set wan gateway as 70.63.227.237, allowed it to be name server
Spectrum can see my connected router but i can not get out to the internet.
had to set it back to dhcp with nat routing so others can still get out to internet.
What am I doing wrong?

given information above i also tried:
option 2, set WAN
said not to use dhcp
pointed ip to 70.63.227.238
used bit count of 22 which should be subnet mask of 255.255.255.252
set gateway to 70.63.227.237
lan set to dhcp
still no access to internet

i am an old guy trying to make opnsense work at a makerspace. I have read tuttorials and watched a lot of youtube but i cannot get it to see internet.  It is probably something stupid. Here is what I have:
Spectrum modem router. When switch is just connected to it everything gets out to the internet. hare are specs
ARRIS Router
Host Name: ARRISGW
Routing Enabled
Wireless Disabled
Firewall IPSec Pass Through Enabled
Firewall PPTP Pass Through Enabled
Firewall L2tp Pass Through Enabled
LAN Settings
IP Address: 192.168.0.1
Subnet Mask 255.255.255.0
Enable DHCP server
Start IP Address 192.168.0.2
Ending IP Address 192.168.0.254
NAT Mode Route With NAT
UPNP Enabled
WAN Static Settings (You will not be able to see these from 192.168.0.1 browser)
Static Gateway IP 70.63.227.237
Static Useable IP 70.63.227.238
Static Subnet 255.255.255.252
Static DNS1 24.25.5.60
Static DNS2 24.25.5.61
WAN setup
DHCP enabled
IP Address 172.72.192.11
Subnet Mask 255.255.248.0
Gateway Address 172.72.192.1
Dynamic (IPV6)
DHCP Enabled
IP Address V6 2606:A000:DFC0:0:3010:EB7E:EFD0:EA06
Delegated Prefix 2606:A000:C1C6:ED00::
Delegate Prefix Length 56
IPV6 Gateway Address FE80::217:10FF:FE95:8A97

The opnsense is latest release on a computer between Spectrum and switch set at factory defaults.
I plug modem to motherboard nic which is em0. i have a 4 port nic card in computer and plug switch into last port igb3.
I go to option 1 and try auto find for wan and lan. it cannot find anything so i put em0 for wan and igb3 for lan.
I can ping things from inside lan but cannot get out to internet.
i go to option 2 and set lan for ipv4 and dhcp
everything internal is on 192.168.1.x
Please help me understand what i am doing wrong.
Thank you.