PS3 unsupported security bypass?

Where I live, the internet provided uses WPA2 security. The PS3 does not support this security and hence I am not able to play internet multiplayer games when using the ethernet port or provided wifi.

Is it possible to plug my own router into the ethernet port, emit wifi with a different security and then connect to the wifi of that router with the PS3? If so, which routers allow this function? I really hope this is possible, but if not, do you know of an alternative bypass of this unsupported security?

Many thanks in advance.
 
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