This rule is incorrectly blocking my communication. Source 10.1.13.255 Target My_computer_IP Port TCP Does anyone know how to disable this without completely disabling the firewall? I suspect a rule to block IP addresses ending in .255 was added to ESET on 23/9/2008, as I had no problem in the past & that is what my log shows. My set up is slightly non-standard which I suspect maybe the problem. My ISP allows un-metered access within the local exchange over a second PVC connection. They refer to it as Community Net http://www.adam.com.au/communitynet/ So I have configured my billion 7402vgp router to have a second PVC. As such I have 2 IP addresses and communicate over 2 sub-net address ranges. My main WAN connection has IP Address 219.90.x.x range with Subnet Mask 255.255.255.255 In contrast my free local exchange connection is configured as Description: RFC 1483 routed mode VPI: 8 VCI: 36 ATM Class: UBR NAT: Enable Encapsulation Method: LLC Bridged Resulting in My IP Address 10.1.14.249 Subnet Mask 255.255.240.0 So the 10.1.13.255 is a valid Community Net address. Disabling the firewall ensures my second connection works again. Connections to other Community net addresses appear to work with the fire wall on.