Configure NAT for Two Separate Web Servers

September 30, 2009 at 09:04:59
Specs: Windows
Is it possible to configure a Cisco Router to do NAT to
two physically separate web servers with two distinct
private IP addresses?


See More: Configure NAT for Two Separate Web Servers

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#1
September 30, 2009 at 13:37:44
Unless it supports host headers then no if both use same port.
Many can support multiple IP's but you'd need two IP's to net.
Set one or both FQDN's DNS entry to a port other than port 80 and then nat it that way. For example abc.com xxx.xxx.xxx.xxx:80 and bcd.com xxx.xxx.xxx.xxx:81 If you can.

Playing to the angels
Les Paul (1915-2009)


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#2
September 30, 2009 at 17:57:04
Thanks for the prompt reply. Sorry, I have a few more
questions...

Do you know if most routers support host headers or is that
a unique feature to have? Also, does the end user see the
FQDN with the port number on the end of the URL or would
that be hidden (eg. abc.com:80)?

What you have suggested sounds like a good workaround
but I am curious to know how other companies deal with this
situation. I am reluctant to implement something that doesn't
follow industry best practices.


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#3
October 2, 2009 at 13:28:57
You'd have to look at each router, software based will most likely offer support, I have never seen Cisco offer it but I never needed to look for it either.

No user ever sees the IP address of a site in a browser. The reason you use a FQDN instead of ip (which is assumed to be 80) or an IP:port number is that people don't want to type ip addresses in. They like google and ooodle and abc.com and such.

There is no other way to do what you want. Either change ports in record or use host headers. If you find another way then please inform me.

Playing to the angels
Les Paul (1915-2009)


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#4
October 2, 2009 at 14:29:54
Ok, thanks for your help:)

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