Forwarding to a specific address

On the face of it, what you are asking for is how virtual servers work;

listen on 1.1.1.1:8411 and send all connections to a pool that contains 2.2.2.2:8411

But maybe what you need is to have a wildcard virtual server 0.0.0.0:any and pluck just that traffic out that is for 1.1.1.1:8411 but leave everything else free to go where ever the routing table says it should go.

If so, you could try something like this:

 
 when CLIENT_ACCEPTED { 
 switch [IP::local_addr] { 
 1.1.1.1 {  
 log local0. "I found IP addr 1.1.1.1" 
 switch [IP::protocol] { 
 6 { 
 switch [TCP::local_port] { 
 8411 {  
 log local0. "I found TCP port 8411" 
 node 2.2.2.2 
 } 
 default { log local0. "These aren't the ports you're looking for" } 
 } 
 } 
 17 { 
 switch [UDP::local_port] { 
 8411 {  
 log local0. "I found UDP port 8411"  
 node 2.2.2.2 
 } 
 default { log local0. "These aren't the ports you're looking for" } 
 } 
 } 
 default { log local0. "This isn't the right transport protocol" } 
 } 
 } 
 default { log local0. "This isn't the right IP addr" } 
 } 
 }