RE: one external IP to multiple internal IPs? Ideas? -- MIDRANGE-L

Yes, we have those set up, but they are in our DMZ.  So, they must point to
an external IP.  Then, the firewall routes that IP to a sigle IP inside our
firewall.  What I wish we could do (and I'm sure there's a way but don't
know enough about it) is to send the DNS name to an internal entry behind
our firewall, thus, sending a single IP to multiple internal IPs.

Any networking experts out there?  ;)

Brad

> -----Original Message-----
> From: Chris Bipes [mailto:rpg@cross-check.com]
> Sent: Monday, May 08, 2000 4:30 PM
> To: 'MIDRANGE-L@midrange.com'
> Subject: RE: one external IP to multiple internal IPs? Ideas?
> 
> 
> Do you have separate domain entries in your DNS system.  i.e..
> Serv1.domain.com, Serv2.domain.com....  Each of these can and should a
> unique IP address.  This should not be done via the router 
> but via the DNS
> server.  I am NOT an expert on this but it is my 
> understanding that this is
> how it all is suppose to work.  I know we have several 
> domains coming to our
> router and from there to the proper server based on the DNS 
> lookup.  The one
> internal that the router points to should be the DNS server.
> 
> Christopher K. Bipes   mailto:ChrisB@Cross-Check.com
> Sr. Programmer/Analyst         mailto:Chris_Bipes@Yahoo.com
> CrossCheck, Inc.       http://www.cross-check.com
> 6119 State Farm Drive  Phone: 707 586-0551 x 1102
> Rohnert Park CA  94928 Fax: 707 586-1884
> 
> If consistency is the hobgoblin of little minds, only 
> geniuses work here.
> Karen Herbelin - Readers Digest 3/2000
> 
> 
> -----Original Message-----
> From: Stone, Brad V (TC) [mailto:bvstone@taylorcorp.com]
> Sent: Monday, May 08, 2000 11:38 AM
> To: 'MIDRANGE-L@midrange.com'
> Subject: RE: one external IP to multiple internal IPs? Ideas?
> 
> 
> But the guys that have the router say I can't map more than 
> one internal IP
> to one external IP.
> 
> Brad
> 
> > -----Original Message-----
> > From: Chris Bipes [mailto:rpg@cross-check.com]
> > Sent: Monday, May 08, 2000 12:52 PM
> > To: 'MIDRANGE-L@midrange.com'
> > Subject: RE: one external IP to multiple internal IPs? Ideas?
> > 
> > 
> > Look like the best approach to me.  You may also want to 
> bind this IP
> > address to one particular interface if you have more than one 
> > on the system.
> > I prefer to have internal telnet to one IP and interface and the
> > web/mail/... to other IPs and interface.  This can be in 
> > different subnets
> > and different physical switches, hub and routers as well.
> > 
> > Christopher K. Bipes         mailto:ChrisB@Cross-Check.com
> > Sr. Programmer/Analyst       mailto:Chris_Bipes@Yahoo.com
> > CrossCheck, Inc.     http://www.cross-check.com
> > 6119 State Farm Drive        Phone: 707 586-0551 x 1102
> > Rohnert Park CA  94928 Fax: 707 586-1884
> > 
> > If consistency is the hobgoblin of little minds, only 
> > geniuses work here.
> > Karen Herbelin - Readers Digest 3/2000
> > 
> > 
> > -----Original Message-----
> > From: Stone, Brad V (TC) [mailto:bvstone@taylorcorp.com]
> > Sent: Monday, May 08, 2000 8:30 AM
> > To: 'MIDRANGE-L@midrange.com'
> > Subject: one external IP to multiple internal IPs? Ideas?
> > 
> > 
> > I am looking for ideas.
> > 
> > We have an As/400 that we are using for web serving.  Our 
> > network group has
> > a router set up to route requests to it.
> > 
> > This server will be serving multiple companies for customer 
> > service.  What I
> > would like to do ideally is set up an instance for each 
> company (using
> > BindSpecific) so that each of them can run in seperate jobs.  
> > Also, logging
> > seperately is another reason I want to do this.
> > 
> > What we plan on doing is making a subdomain for the companies 
> > that will
> > route these requests to the AS/400.  For example, 
> > company1.com will have a
> > subdomain of cso.company1.com that will be routed a 
> > particular external IP
> > address, then routed to the AS/400.
> > 
> > Our network guys tell me they can only route IPs on a one to 
> > one basis, so
> > to run multiple servers I would need an external IP for 
> each company.
> > 
> > So, here's what I want..
> > 
> > URL                 Ext. IP      AS/400 IP
> > cso.company1.com -> 218.1.1.2 -> 172.25.6.1
> > cso.company2.com -> 218.1.1.2 -> 172.25.6.2
> > etc.. 
> > etc..
> > 
> > Does anyone else have any better ideas?  I know I can use 
> > virtual hosts and
> > one IP address, but like I said, I'd rather keep them seperate.
> > 
> > Brad> 
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