@nui_p I think @Clive_A is right, some detailed diagnosis is required. Just to review what happens when you ping a device The typical process is: You enter a command to ping a destination. DNS is...

@1haikalaiman PPPoE only obtains a single IP. If you wish to use a public IP block, then you need a router that supports a 'Public routed subnet'. I'm not sure about the ER8411 but other routers in...

@Larry_C-84 Can I suggest you post your WAN configuration details so we can see if we can spot any likely problems

@nui_p Ah! I see the printer has an address reservation of .15 which is outside the DHCP range of .100 to .199. Whilst this ought to be OK I'm never sure about that situation. Looking at it from the...

@nui_p Does the fact that the router doesnt have an arp entry for the printer definitely correspond with not being able to print ? No, even without ARP entry in the ARP list, I'm able to print /...

@nui_p When doing a simple ping from local computer to the printer (or terminal), the ARP list is not updated (even if the ping is successful). When doing a ping from router to printer (or terminal),...