How to find isc-dhcp-server start problem on Debian 10?

Question

Debian

I'm trying to configure isc-dhcp-server, set the settings according to this article.
Network card settings:

/etc/network/intefaces.d/setup

auto lo
iface lo inet loopback

# Сетевая карта подключена к локальной сети
auto enp5s0
iface enp5s0 inet static
  address 192.168.0.1
  netmask 255.255.255.0
  gateway 192.168.0.1

# Сетевая карта подключена к сети провайдера
auto enp3s0
iface enp3s0 inet static
  address 172.16.8.15
  netmask 255.255.255.0
  gateway 172.16.8.13
  dns-nameservers 172.16.8.4 172.16.8.5

The interface for distributing addresses is specified:

/etc/default/isc-dhcp-server

$ cat /etc/default/isc-dhcp-server
INTERFACESv4="enp5s0"
INTERFACESv6=""

But the service does not start:

A photo

Is there a utility to find errors in the isc-dhcp-server configuration? Tell me how to overcome this problem?

Answer 1

Don't you think that GW is superfluous here?

iface enp5s0 inet static
  address 192.168.0.1
  netmask 255.255.255.0
  gateway 192.168.0.1

https://www.server-world.info/en/note?os=Debian_10...