[comp.protocols.tcp-ip] FTP Between LAN Node and DDN Foreign Host

TAC.1912-SCTC@E.ISI.EDU (07/11/88)

We  are  in  the process of configuring several local  area  networks 
which  will  be  linked together through another host  serving  as  a 
router.   We  also  have  a DDN host  for  Milnet  connectivity.   In 
considering the configuration,  the question was raised as to how  an 
FTP  can  be done between a LAN user and a foreign host  on  DDN.   A 
picture of the system is given below.  

Each LAN has a DEC MicroVax II for the server.  Each MV2 is connected 
to  a DEC 8650 via DECNet or dial-up access.   There is a second  VAX 
8650  serving as the DDN host.   The 8650s are connected by DECNet as 
well.  All machines are running Ultrix-32 with TCP/IP. 


 _______       ________        ________    +=======+    ___________
|       |     |        |      |        |   {       }   |           |
|  MV2  |_____|  VAX   |______|  VAX   |___{  DDN  }___|  FOREIGN  |
|_______|  |  |  8650  |  |   |  8650  |   {       }   |   HOST    |
    |      |  |________|  |   |________|   +=======+   |___________|
 ___|____  |______________|
|        |    (alternate)
|  Z248  |    (  route  )
|  USER  |    (possbile )
|________|


Problem:   A user on a Zenith Z-248 logs into the MV2 and then  wants 
to  do an FTP beteen the MV2 and a DDN foreign host.   Is there a way 
to  make  the two VAX 8650s function in such a manner  that  the  FTP 
occurs  directly  between the MV2 and foreign host rather than  using 
the  DDN  host as an intermediary  (i.e.  requiring  two  FTPs)?   If 
software can be written to do this function, where can it be obtained 
if already written?

Please send all responses directly to me,  not the TCP-IP  group.

TAC.1912-SCTC@ISIE.ARPA  (Check the header to be safe).


STEVEN P. LONG, Capt, USAF            (804) 764-6502
1912 CSGP/MCN                          AV   574-6502
Langley AFB, VA 23669