confused newbie " should be simple network fix HELP ;(

i know this is probably no brainer for someone but cannot figure out how to get this to work, i cant fifure out how to split the internet access between the 3 network cards

1 for personal / family network

  1. for my " server"
  2. for wireless network

computer/router with 5.2 3 network cards

i had someone else setup the YES …currently running network on 192.168.1.0 net for family personal use…

but for the life of me cant figure out how to setup the other 2 network cards

  1. is 192.168.1.1/24 gateway 192.168.1.1
  2. is 192.168.100/24
  3. is 192.168.2.1/24

how do i setup mikrotik 5.2 so they all have access to the internet ( giving servers priority if that’s not too hard to do ) but NOT have access to each others networks …i dont want someone to " accidentally access servers and mess it up … i " only " want ports open for the usual suspects… ftp, mail port 80, 25 26 imap, pop3 etc…

thanks Sooooooooooooooooo much for your help

Scott