How to access the real server(node)?pls help me

yeah,you are right.it's a flat subnet,but the default route of the server 10.18.3.1 and 10.18.3.2 is the ip address of the f5 bigip,and the route of the bigip is the next route address ,so all the traffic to the server will be going via the f5 device.

 

Now the problem is that the server 10.18.3.1 and 10.18.3.2 both can access outside network and the test laptop computer can access the vip service on f5 bigpip ,but the test laptop computer can not access the any services of the server 10.18.3.1.

 

 

As you said,i use the tcpdump,when i initiate a connect to server 10.18.3.1,on the test computer ,i dumped the network packets,and i find out that there was just SYN packet to server 10.18.3.1, but no ACK response packet. On the server(10.18.3.1)side ,the packet shows that the server(10.18.3.1) responsed the SYN request of the test computer with ACK+SYN,but got a RST response packet of the test computer meantime,but the test computer definitely did not response the RST packet. That is why i am curious. I think that the f5 bigip device captured the responding packet from the server to test computer and response a RST packet to server with the ip of the test computer(10.18.2.25).

 

 

So i want know how to config the f5 bigip device so that the packet can pass through the f5 bigip to the test computer correctly.

 

Finally ,thank you very much for your help ,and i hope you can give me some more suggestion in this condition. I vary appreciate you help . Thank you very much again.