Remote Ip Address - Modifies http(s) header and adds variable IPREMOTEADDR containing client IP.

ClientIPForwader 1.4.8
ClientIPForwarder is a simple ISAPI plug-in for Microsoft ISA server using pass-through technology to control incomming requests on Microsoft ISA server. It modifies http(s) request header and adds variable IPREMOTEADDR containing client IP address to it. It also can map http server variables into your own variables in http header.
isa server filter, isa server, isapi filter, plug-in, http header request, remote ip address, servervariables, ipremoteadrr, remote_addr, remote_host,