==================================== Gateways and monitoring ==================================== The address you are trying to monitor should be reachable using the interface the gateway is attached to, either directly or using a static route (check :menuselection:`System --> Routes --> Status`). --------------------------------- dpinger:.. sendto error: XXX --------------------------------- Usually found in :menuselection:`System --> Log Files --> General`, every code has a meaning, usually explained in `errno.h `__ (:code:`man errno`) Some common ones are explained below: ====== ==================== ================================================================================= XX Name Description ====== ==================== ================================================================================= 55 ENOBUFS No buffer space available. An operation on a socket or pipe was not performed because the system lacked sufficient buffer space or because a queue was full. **Check connectivity from the machine itself using** :code:`ping`, most common mistakes are misconfigured routes, interface issues (disconnected) and policy based routing issues forcing traffic to the wrong target (using :code:`reply-to`) 64 EHOSTDOWN Host is down. A socket operation failed because the destination host was down. **Expecting an (layer 2) ARP response but none was returned, often misconfigured subnets or hosts are actually not accessible over L2** 65 EHOSTUNREACH No route to host. A socket operation was attempted to an unreachable host **The routing table is a good place to look** (:menuselection:`System --> Routes --> Status`) ====== ==================== ================================================================================= ------------------------------------------ arpresolve: can't allocate llinfo for.. ------------------------------------------ This message usually means that the configured gateway lies outside the configured subnets for this firewall (for IPv4). .. Tip:: Double check the subnets of your interface and virtual IP's, you can also use :menuselection:`Interfaces --> Overview` for a quick list of all configured addresses.