RE: one external IP to multiple internal IPs? Ideas?

Brad,

What you could try is using host headers and a web server on port 80 for all
the companies. The web server on port 80 would issue a redirect to a
non-standard port. The URL would change, but this would work. 

So, www.cso.company1.com would point to 218.1.1.2 and so would
www.cso.company2.com. Based on the host header the server would redirect
company1.com to a web server on port 8888 at 218.1.1.2 and company2.com to a
web server on port 8889 on 218.1.1.2 

Of course then your network guys would have to poke holes in your firewall
at port 8888 and port 8889. You'd then have the option of routing these to
the same IP address on your AS/400 using different ports, or to different IP
addresses, doesn't matter. Also, you'd have to hope that the browser didn't
work for a company that had a firewall/proxy-server that prevented them from
accessing web pages on non-standard ports.

$200 change on a one-time fee, not bad. $200 per month and you are getting
robbed.

-Walden

-----Original Message-----
From: Stone, Brad V (TC) [mailto:bvstone@taylorcorp.com]
Sent: Tuesday, May 09, 2000 1:39 PM
To: 'MIDRANGE-L@midrange.com'
Subject: RE: one external IP to multiple internal IPs? Ideas?


Well, they charge $200 for two of them... maybe more.  That's what our
network guys bill us.  Maybe we're getting robbed.  Wouldn't be the first
time.  ;)

What I was really hoping was to have as a last resort was an Instance
running on the AS/400 that did the forwarding for me.  But, that would
change the URL in the browser (I think) and that wouldn't be good.

Thanks for all your help guys!

Brad

> -----Original Message-----
> From: Walden H. Leverich [mailto:WaldenL@techsoftinc.com]
> Sent: Tuesday, May 09, 2000 9:05 AM
> To: 'MIDRANGE-L@midrange.com'
> Subject: RE: one external IP to multiple internal IPs? Ideas?
> 
> 
> 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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