OPT1 net can't ping gw, no internet

[jukmo]

Hey there

I have 3 network cards in my opnsense box. WAN and LAN work fine OPT1 does not on the other hand.
NAT rules are automatically generated, I added a firewall rule but the OPT1 GW ip is not pingable from connected hosts and therefor no connectivity other than the local net, minus the GW.
GW IP is 10.100.102.1 and oingable from the opnsense box itself, I have attached screenshots from the configuration. WAN is called 'Services', OPT1 is called 'Users'.
What am i missing here?