HOW to take liveupdate to a symantec server (no connect internet) from a symantec server

Dear all Symantec technical and member,

Now i'm having one problem, could some one else help me please.

Now I have 2 server using Symantec endpoint protection manager. ( 1 server connect to internet :Server: A  and 1 server connect in LAN with Server A - no connect to internet)

Now everyday I using live update of server A connect to internet to update defenition, But with server B connect to Server A in LAN cannot using internet.

How to update Server B through server A by LAN connection without download  *.JDB file every day?

Anyone have any solution please help me! Thank you very much.