iRule using Sideband

root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.19.252:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        myrule
    }
    snat automap
    vlans-disabled
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm pool foo
ltm pool foo {
    members {
        200.200.200.101:80 {
            address 200.200.200.101
        }
    }
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm rule myrule
ltm rule myrule {
    when HTTP_REQUEST {
   if {[string tolower [HTTP::path]] ends_with ".pdf"} {
      if {[catch {connect 200.200.200.102 80} conn_id] == 0 && $conn_id ne ""} {
                set data "GET /wt.cfm?fileurl=http://[http_host][http_uri] HTTP/1.1\r\nHost: cmspublish.niehs.nih.gov\r\nConnection: Close\r\n\r\n"
                send $conn_id $data
      }
   }
}
}

 connection 1 is from client to bigip
 connection 2 is sideband from bigip to 200.200.200.102:80
 connection 3 is from bigip to pool (foo)

[root@ve11a:Active:Changes Pending] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.19.251(36480) <-> 172.28.19.252(80)
1349358406.9334 (0.0010)  C>S
---------------------------------------------------------------
HEAD /dummy.pdf HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: www.abc.com

---------------------------------------------------------------

New TCP connection 2: 200.200.200.11(32170) <-> 200.200.200.102(80)
1349358406.9357 (0.0010)  C>S
---------------------------------------------------------------
GET /wt.cfm?fileurl=http://www.abc.com/dummy.pdf HTTP/1.1
Host: cmspublish.niehs.nih.gov
Connection: Close

---------------------------------------------------------------

New TCP connection 3: 200.200.200.11(36480) <-> 200.200.200.101(80)
1349358406.9368 (0.0010)  C>S
---------------------------------------------------------------
HEAD /dummy.pdf HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Accept: */*
Host: www.abc.com

---------------------------------------------------------------