MVPI was under the impression that any connection originating from the BIG-IP would use the self-IP by default-ish. Management type traffic, like LDAP queries, DNS queries, etc use TMM self IP. So do health check monitors against a pool member. However, generally you can source NAT the F5 BIG-IP connection through a VIP using a pool or even an iRule. Are you able to select a SNAT pool on the VIP assigned to the socks proxy config? (I presume you have internal clients targetting the VIP for their proxy needs.) My preference is to use the VIP as the same IP in a SNAT pool, so its easy to marry client side and server side of a connection (yes, up to 64k active sessions or so, so one needs to be cautious here with this methodology).
