I have a customer with a RB411 running 5.19. They hav ben running fine for months. I can winbox into their cpe on the Wlan interface from my tower. everything looks fine. the arp list shows the ethernet computers ip address. I can't ping it from the cpe. firewall is normal. defaut route is correct.
They can't surf or ping past the cpe. they can ping and winbox the cpe from the lan.
I would appreciate any help.