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

Unfortunately, your network guys are correct. Based on what you are saying
you are probably using network address translation (NAT) to map from the
external addresses to the internal addresses. There is no way to map a
single external address to multiple internal addresses (ignoring load
balancing, which doesn't help you here). You will need to have multiple
external addresses. However, this shouldn't be a problem, your ISP should
give you plenty of addresses. If you've run out, just ask for more. 

-Walden

-----Original Message-----
From: Stone, Brad V (TC) [mailto:bvstone@taylorcorp.com]
Sent: Monday, May 08, 2000 2:38 PM
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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