At 04:38 PM 11/13/97 -0000, Tony Lloyd wrote: >Sure can. We ship Pipeline 50's with V5.1A loaded and NAT enabled to >clients with SMTP servers etc sitting on their LAN. The traffic is routed >by port number. All traffic from the outside world is sent with the >destination address set to that of the Pipeline (yeah, needs a static >allocated to it) so for example: > >SMTP goes to 123.123.123.123:25 >WWW to 123.123.123.123:80 >Telnet to 123.123.123.123:23 >FTP to 123.123.123.123:21 >etc... > >As the only address that's visible to the outside world is that assigned by >the MAX (or whatever the Pipeline's connecting into) then ALL services >behind the Pipeline are known by that address. > >All the hard work is done by the Pipeline with what it calls 'Static >Mappings' - these simply map traffic with a destination address of the >Pipeline coming in on (say) TCP port 25 to the local IP address of the >server running that service and the port it's running the service on. > >ie SMTP traffic comes in (Port 25) and needs to go to server 11.22.33.44 on >port 25, so the static map says 'Any traffic inbound on 25 gets routed to >11.22.33.44 on 25' > >You can even set a default 'route' for traffic not covered by the static >maps. > >I'm not clear as to what path to take if multiple servers exist for a >service but it'd probably involve a bit of port-mapping somewhere along the >line. > >Check the release notes for V5.1a on Ascend's FTP server for a more >detailed discussion of NAT and it's implementation. > >Hope this heps > >Tony Lloyd - Network Sstems Engineer >Onyx Internet > >-----Original Message----- >From: Edwin Yeh [SMTP:ery2@po.cwru.edu] >Sent: Wednesday, November 12, 1997 10:00 PM >To: edwin_yeh >Cc: ascend-users@bungi.com >Subject: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)? > >I don't know exactly how NAT works. (I'll be interested to know. All I can >guess, is that when the packet exists the router, somehow the header >information is wrapped.) > >But can you run servers (such as ftp server or web server) behnid the >Pipeline router (running NAT)? > >In other words, is there a way for outside users to point to a specific >machine inside the NAT subnet. > >Thanks. > >Edwin > >P.S. I can think of a solution. That is, don't use NAT and run DNS after >the >pipeline router. The DNS effectively become the router and the pipeline >effectively become a Terminal Adapter. But if this is the case, why buy the >pipeline. We can do it with ~$150 ISDN TA. We are using pipeline because >it's cost effective for a subnet running multiple machines and the router >performs better than the computer. However, functionality will come before >performance. If we cannot solve this problem, we will be forced to drop the >pipeline solution. > >++ Ascend Users Mailing List ++ >To unsubscribe: send unsubscribe to ascend-users-request@bungi.com >To get FAQ'd: <<A HREF="http://www.nealis.net/ascend/faq">http://www.nealis.net/ascend/faq</A>> > >++ Ascend Users Mailing List ++ >To unsubscribe: send unsubscribe to ascend-users-request@bungi.com >To get FAQ'd: <<A HREF="http://www.nealis.net/ascend/faq">http://www.nealis.net/ascend/faq</A>> > Kevin ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request@bungi.com To get FAQ'd: <<A HREF="http://www.nealis.net/ascend/faq">http://www.nealis.net/ascend/faq</A>> </PRE> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <STRONG>Follow-Ups</STRONG>: <UL> <LI><STRONG><A HREF="msg10727.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG></LI> <UL> <LI><EM>From</EM>: Luke Parrish <lparrish@iAmerica.net></LI> </UL> </UL> <!--X-Follow-Ups-End--> <!--X-References--> <STRONG>References</STRONG>: <UL> <LI><STRONG><A HREF="msg10704.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG></LI> <UL> <LI><EM>From</EM>: Tony Lloyd <tony.lloyd@onyx.net></LI> </UL> </UL> <!--X-References-End--> <!--X-BotPNI--> <HR> <UL> <LI>Prev by Date: <STRONG><A HREF="msg10725.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg10722.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg10704.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg10727.html">Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="maillist.html#10720"><STRONG>Main</STRONG></A></LI> <LI><A HREF="thrd240.html#10720"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> </BODY> </HTML>