if not databreak buffer +data exceptpass return buffer modify any requests destined for the remote host def request_handler(buffer)perform packet modifications return buffer modify any responses destined for the local host def response_handler(buffer)perform packet modifications return buffer this is the final chunk of code to complete our proxy first we create our hex dumping function that will simply output the packet details with both their hexadecimal values and ascii-printable characters this is useful for understanding unknown protocolsfinding user credentials in plaintext protocolsand much more the receive_from function is used both for receiving local and remote dataand we simply pass in the socket object to be used by defaultthere is two-second timeout setwhich might be aggressive if you are proxying traffic to other countries or over lossy networks (increase the timeout as necessarythe rest of the function simply handles receiving data until more data is detected on the other end of the connection our last two functions enable you to modify any traffic that is destined for either end of the proxy this can be usefulfor exampleif plaintext user credentials are being sent and you want to try to elevate privileges on an application by passing in admin instead of justin now that we have our proxy set uplet' take it for spin