Here are some images of me accessing Syphon Filter: The Omega Strain online:
(Logging in online)
(Online Command Center)
(Hosting game lobby/mission)
In order to play online, just set your Primary DNS Server in your PS2 Network Configuration to:
199.195.251.151
(24/7 DNS server hosted by Bobz of BobzEnt.info; As a bonus, this DNS configuration will also allow you to play any of the Tony Hawk PS2 games, Battlefield 2: Modern Combat (Account Creation), Tribes: Aerial Assault, All-Star Baseball 2005, Blitz: The League, NBA Ballers, NBA Ballers: Phenom, MLB SlugFest: Loaded, Mortal Kombat: Deception, Mortal Kombat: Armageddon, Deer Hunter and Risk: Global Domination online as they, too, are hosted by Bobz)
See you online!
Special thanks to FreddY for providing the hosting method and to Bobz of BobzEnt.info for hosting Syphon Filter: The Omega Strain 24/7.