[DavidKember]

Open your server.cfg. add a line called "bind" > add your IPV4 IP adress < . Then change the port to whatever you want, after that, simply open SA-MP client, and add your IPV4 IP adress, and the port you chosed, for example.

echo Executing Server Config...
lanmode 1 > This must be set to "1"
rcon_password ur rcon pass
maxplayers 30
port 7777
hostname BLABLABLA
gamemode0 Your Gamemode
filterscripts ur fs
plugins ur plugins
announce 1
query 1
chatlogging 0
weburl www.blabla.com
onfoot_rate 40
incar_rate 40
weapon_rate 40
stream_distance 300.0
stream_rate 1000
maxnpc 0
logtimeformat [%H:%M:%S]
bind > HAMACHI IPV4 IP ADRESS <

Then connect using your IPV4 IP Adress, and your port.

EXAMPLE :
>IPV4 IP > 55.55.55.55:7777