Connection to servers on CS:S and killing floor is blocked. help :C

[SeventhSandwich]

Maybe the fact that only tf2 works gives a clue to the problem? I really have no clue what to do and nothing I've tried has worked in the least.

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[SeventhSandwich]

Also, I'm using an airport express router. On every single other computer in my home, I can access games 100% fine, but on this one, ONLY TF2 works. I have no clue what to do.

[SeventhSandwich]

anyone?

[SeventhSandwich]

this is new.L4D2 also works fine.

what the hell lol.

[Ningyou]

Heartless forgets, help the damn Sandwich!