---
title: "Gateways and monitoring"
description: "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…"
---

> Documentation Index
> Fetch the complete documentation index at: https://docs.ixolate.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 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 **System › Routes › Status**).

## dpinger:.. sendto error: XXX

Usually found in **System › Log Files › General**, every code has a meaning, usually explained in errno.h (`man errno`)

Some common ones are explained in the `errno` section.

## 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 **Interfaces › Overview** for a quick list of all configured addresses.

Source: https://docs.ixolate.com/troubleshooting/gateways/index.mdx