| 主权项 |
1. A method performed by data processing apparatuses, the method comprising:
maintaining data that corresponds, for each of a plurality of port numbers, to a corresponding modified port number receiving, from a device over a network, a first request that includes an address that includes a first port number; in response to receiving the first request, determining, based at least in part on information included in the first request, that the first request is to be redirected by determining that the first port number matches one of the plurality of port numbers in the maintained data; in response to determining that the first request is to be redirected, sending, to the device over the network, a redirect message that includes the address and a second port number different than the first port number, wherein the second port number is the modified port number that corresponds to the matched port number in the plurality of port numbers in the maintained data; receiving, from the device over the network, a second request that includes the address and the second port number; determining that the port number is included in a predetermined list of port numbers; responsive to determining that the port number is on the predetermined list of port numbers, modifying the second request by removing the second port number and inserting the first port number; and sending the modified second request to the address. |
