Route local traffic to ip1:port to extern ip2:port

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http://serverfault.com – I have a service setup that redirects after a succesfull login (Couchbase), but the IP it transfers to is an local one, where the client that is connecting to cannot reach. How can I setup iptables so that I can route traffic generated by the client itself to another port? Client connects to server1 Server1 sends Client the ip to connect to (Which is local to server1, not Client) Client gets redirected to (Can't reach) IPTables routes all traffic that is send to to outside_ip:11210 The HTTP service just returns and IP to connect to, thus 'redirecting (HowTos)