I have recently purchased the Peplink Surf SOHO MK3 and have been working to perform initial configuration. I have been following the recommendations from routersecurity.org’s initial configuration page to do this.
I have come across a few things about the Peplink’s firmware that I don’t understand very well and am hoping to get some clarity here. I am running firmware version 8.1.1
Under Advanced → Firewall → Access Rules, there is one default rule for Inbound Firewall Rules. This rule states: Protocol Any, WAN Any, Source Any, Destination Any, Action (green check mark - allow). This is concerning to me as this seems to default to allowing all inbound traffic through the firewall. Am I understanding this default rule correctly? I would rather have expected the Inbound Firewall to block all traffic by default.
How can I tell if a particular outbound port number is being blocked by the firewall?