Layer-specific modifications to network communications according to configurable rules at a proxy

A method, comprising:

• receiving, over a network at a proxy:
• a modification configuration of a plurality of different modification configurations for modifying a single layer of a plurality of layers of a communication, wherein the plurality of layers is included in a communication stack supported by the proxy, and
• a selection of one layer of a plurality of layers for applying a modification according to the modification configuration, wherein respective modification configurations of the plurality of different modification configurations are configured to be applied to the plurality of layers;
• receiving, over the network at the proxy, a communication, wherein the communication is generated by a source to be transmitted to a recipient according to the communication stack comprising the plurality of layers, and wherein the communication comprises a network-based service request to implement one or more functions for at least one of a client or an application;
• determining, by the proxy, that the modification is to be applied to the one layer of the plurality of layers based on the selection of the one layer of the plurality of layers;
• evaluating, by the proxy, content of the communication at the one layer of the plurality of layers of the communication stack to determine that the modification to the communication is applicable at the one layer of the plurality of layers in the communication stack and according to the modification configuration for the one layer of the communication stack received at the proxy;
• and
• applying, by the proxy, the modification to the one layer of the plurality of layers of the communication as part of processing the communication at the proxy based on the evaluation of the content of the communication.

One or more non-transitory, computer-readable storage media, storing program instructions that when executed on or across one or more computing devices cause the one or more computing devices to implement:

• receiving, over a network at a proxy:
• a modification configuration of a plurality of different modification configurations for modifying a single layer of a plurality of layers of a communication, wherein the plurality of layers is included in a communication stack supported by the proxy, and
• a selection of one layer of a plurality of layers for applying a modification according to the modification configuration, wherein respective modification configurations of the plurality of different modification configurations are configured to be applied to the plurality of layers;
• receiving, over the network at the proxy, a communication, wherein the communication is generated by a source to be transmitted to a recipient according to the communication stack comprising the plurality of layers, and wherein the communication comprises a network-based service request to implement one or more service functions for at least one of a client or an application;
• determining, by the proxy, that the modification is to be applied to the one layer of the plurality of layers based on the selection of the one layer of the plurality of layers;
• evaluating, by the proxy, content of the communication at the one layer of the plurality of layers of the communication stack to determine that the modification to the communication is applicable at the one layer of the plurality of layers in the communication stack and according to one or more rules included in a modification configuration for the one layer of the communication stack configured via an interface to the proxy;
• and
• applying, by the proxy, the modification to the one layer of the plurality of layers of the communication as part of processing the communication at the proxy based on the evaluation of the content of the communication.