Can my Google app receive traffic from a single IP address

Question

I want to host the SMS application in GAE, and all my traffic will come from SMS GATEWAY with one IP address.
Is this normal (I expect 500 dynamic queries / sec)?
Will there be any problems like unusual traffic errors or any other problems?

EDITED

Additional Information:
My users send requests via SMS, which will be redirected to my application from SMS GATEWAY (one IP address).
My application processes these requests and responds via SMS (again via SMS GATEWAY).
I can respond using the FETCH URL (no problem), but I'm worried that if I receive about 500 dynamic requests / sec from one IP address, GAE can block them, considering them a Dos attack (denial of service).

GAE either asks the user to enter captcha in https://www.google.com/accounts/DisplayUnlockCaptcha , or redirect to sorry.google.com and displays an itseems error message if it receives unusual traffic from one IP address. But my users only get access via SMS.

Please review this production problem.

Answer 1

That would be technically feasible - your application can detect the user's IP address using the REMOTE_ADDR environment variable, and if it is the one you want, show them the actual page (showing them 403 otherwise). Your second question is a little more difficult to answer - the App Engine application can handle this, assuming you wrote it in a scalable way (not a trivial guess!), And if you can afford the amount of traffic that you are trying to throw at it.

Answer 2

You are right to worry that receiving this level of traffic from one IP address may lead to protection against DoS protection - this should not be, but it cannot be excluded. If this happens, you can create a production problem and we will take care of it.