F5 LTM (VE) - KeepAlive even if real server close connection

i agree with you that the problem is from missing content-length header. can you try something like this?

what i want to do is to use vip targeted vip. the front one uses oneconnect profile and call the back one. the back vip uses stream profile with dummy source/target and load balance traffic to pool. the stream profile will force bigip to add content-length header in response.

e.g.

[root@ve10:Active] config  b virtual front list
virtual front {
   snat automap
   destination 172.28.19.79:80
   ip protocol 6
   rules frontrule
   profiles {
      http {}
      oneconnect {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule frontrule list
rule frontrule {
   when CLIENT_ACCEPTED {
        virtual back
}
}
[root@ve10:Active] config  b virtual back list
virtual back {
   snat automap
   pool foo
   destination 1.1.1.1:80
   ip protocol 6
   profiles {
      http {}
      mystream {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b profile mystream list
profile stream mystream {
   defaults from stream
   source "aaa"
   target "bbb"
}