Server.properties
The server.properties file is the default configuration for Minecraft servers. It allows you to disable, enable, and modify settings like game difficulty (e.g. peaceful, easy, normal, hard).
Server.properties is located in your servers root directory in the file manager, and below is an example of that file.
allow-flight=false
allow-nether=true
broadcast-console-to-ops=true
broadcast-rcon-to-ops=true
difficulty=easy
enable-command-block=true
enable-jmx-monitoring=false
enable-query=true
enable-rcon=false
enable-status=true
enforce-secure-profile=true
enforce-whitelist=false
entity-broadcast-range-percentage=100
force-gamemode=false
function-permission-level=2
gamemode=survival
generate-structures=true
generator-settings={}
hardcore=false
hide-online-players=false
initial-disabled-packs=
initial-enabled-packs=vanilla
level-name=world
level-seed=
level-type=minecraft\:normal
max-chained-neighbor-updates=1000000
max-players=10
max-tick-time=60000
max-world-size=29999984
motd=Server.pro | ada
network-compression-threshold=256
online-mode=true
op-permission-level=4
player-idle-timeout=0
prevent-proxy-connections=false
pvp=true
query.port=40472
rate-limit=0
rcon.password=
rcon.port=25575
require-resource-pack=false
resource-pack=
resource-pack-prompt=
resource-pack-sha1=
server-ip=
server-port=40472
simulation-distance=10
snooper-enabled=false
spawn-animals=true
spawn-monsters=true
spawn-npcs=true
spawn-protection=16
sync-chunk-writes=true
text-filtering-config=
use-native-transport=true
view-distance=10
white-list=false