Does clientside have access to: Request.ServerVariables("REMOTE_ADDR").ToString() var

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Does clientside have access to: Request.ServerVariables("REMOTE_ADDR").ToString() var

 

I have a web application that grabs data via:

 

Request.ServerVariables("REMOTE_ADDR").ToString()

and

Request.ServerVariables("SERVER_PORT")

 

And possibly some other request.servervariables

 

 

Is it possible for a hacker"" to put crap into those?

 

Aka, should I sanatize those results?

 

Also.. can people spoof Request.ServerVariables("REMOTE_ADDR")? because it is looking so in my logs.. or maybe I didn't implement them right??

 

thanks

Lee