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RHEL (say 5.6, kernel 2.6.18-238) with dual IP address (IPv4v6)

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http://serverfault.com – So I have a SERVER that that utilizes RHEL's (assume 5.6) underlying kernel for setting up TCP connections and other networking aspects. My deployment need requires that the SERVER have dual IP address, an IPv4 and an IPv6 address. The SERVER interacts with two entities, one on the left having an IPv6 address and one on the right having an IPv4 address (as shown in the figure below). The left entity sends a message M to the SERVER over a TCP/IPv6 socket. The same message M needs to be delivered to the right entity by the SERVER over a TCP/IPv4 socket. My questions: Does RHEL 5.6 allow this (HowTos)