A system and method for providing network bridge upstream connections by a network device using proxied network metrics. An upstream network bridge connection request is received in a network device (e.g., a bridge device) from first network component (e.g., a client device) for connecting to a second network component (e.g., a network server device). This upstream network bridge connection request is analyzed by the network bridge to determine if a network attack threat is associated with the client device requesting the upstream network bridge connection to the server device preferably by inspecting certain network metrics present in the downstream connection associated with the client device. If no network attack threat is determined, then a determination is made as to whether a preexisting upstream network bridge connection between the client device and the server device exists in a connection pool database. If yes, then the preexisting upstream network bridge connection is retrieved from the connection pool database and is implemented for creating an upstream network connection between the client and server devices. If there is no preexisting upstream connection, then a new upstream network bridge connection is generated and implemented creating an upstream network connection between the client and server devices. And if the network bridge device determines a network attack threat was associated with the client device requesting the upstream network bridge connection request, then a new upstream network connection is created for coupling the client and server devices, which newly created upstream network connection is separate/segregated from any upstream connections preexisting in the connection pool database.