For PS2/3 users you need to enter in DNS Primary 103.179.142.26 secondary 47.87.163.33 IP. Your PS2/3 must also be hook up to the internet. You can do so by Ethernet cable directly hook up to your router/modem in most cases and of course PS3 users can just use WiFi if they perfer. If you need to hook your PS2 up to your computer for internet just make sure you enable ICS on your computer if using a Windows computer.
For PCSX2 users we assume you already have PCSX2 setup and working in that case you just need to input DNS address inside your Dev9 plugin and input DNS inside PS2 network configuration like you were on a real PS2. After that you should be good.
List of games up on SOCOM3/CA Online!