Re: Apache reverse proxy configuration and ip addresses

Really has nothing to do with apache per se. This is all just basic
networking. I think Rob Berendt has investigated it before. You have two
interfaces on the same subnet. If the routes out of both interfaces are
the same, then the system is going to pick the interface you want to
use, and I don't think you can control it.

Kevin Bucknum
Senior Programmer Analyst
MEDDATA/MEDTRON
Tel: 985-893-2550

-----Original Message-----

From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Dean
Eshleman
Sent: Friday, January 19, 2018 8:49 AM
To: web400@xxxxxxxxxxxx
Subject: Re: [WEB400] Apache reverse proxy configuration and ip

addresses

As I stated in the original message, 10.2.0.109 is one of the IP

addresses

assigned to System 1 (IBMi). I know the ip address for my PC is

something

different. I'm just surprised that when System 1, Apache server 1

forwards

the request to the Apache server on System 2 that the client IP

address in

the access log file shows 10.2.0.109 instead of 10.2.0.31 since I

specified

10.2.0.31 port 10200 when calling the web service on System 1. I

wonder

how System 1 decides which ip address it uses to forward the request?

Dean Eshleman
Software Development Architect
Everence

On 1/18/2018 6:16 PM, Nathan Andelin wrote:

Maybe 10.2.0.109 the address of your PC on the network, that get's
picked up in the log as the originator of the requests.



On Thu, Jan 18, 2018 at 3:01 PM, Dean Eshleman
<Dean.Eshleman-d3hNrR/acMxWk0Htik3J/w@xxxxxxxxxxxxxxxx>
wrote:

Hi,

We have two Apache servers on our IBM I that is in the DMZ. They

are

setup to listen on different ip addresses and different ports.

These

servers are for web services.

System 1 - IBMi in DMZ
Apache Server 1 listens on IP Address 10.2.0.31 port 10200 Apache
Server 2 listens on IP Address 10.2.0.109 port 10000

I'm adding a reverse proxy setup to Server 1 so that it forwards
requests back to another Apache server on an IBM I (System 2) in

our

trusted network. When I test this setup, the Apache access log on
System 2 shows the client ip address as 10.2.0.109. I was

expecting it to

be 10.2.0.31.

Anyone know why that is?

Dean Eshleman
Software Development Architect
Everence

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