Amazing behavior of VPN Concentrator

From: Muhammad Nasim (muhammad.nasim@gmail.com)
Date: Thu Jul 03 2008 - 18:15:40 ART


Dear All,

I am getting strange problem in VPN Concentrator.

Following are the Tasks
1. Allow administaration of VPN concentrator on PUBLIC interface.
2. Disable http to https redirection ( By default HTTP to https redirection
is there on Public interface)
3.The administration should be port *8080.*

Now I have done above tasks more then 10 times and every thing worked fine
for me. My PC from where I want to access VPN concentrator and VPN
concentrator were in same vlan and every thing worked fine.

Just now I put some routers and firewall b/w VPN concentrator and PC for
testing purpose and tried to access VPN conentrator on port
*8080*GUI(graphical user interface). I can see the login page of VPN
concentrator
but when I enterted username and password. I can NOT login to it. BUT if I
change the port to any port other then 8080 it works and I have no issues
to access it.

My question is that why I am able to access VPN concentrator on port 8080
when my PC and VPN-C is in same subnet (vlan) and WHY I CAN NOT ACCESS
VPN-CON ON PORT *8080* when in b/w I have routers and firewalls.

Any Ideas.

Thanlks

-- 
Muhammad Nasim
Network Engineer
Saudi Arabia


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