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Issue in configuring TMG as Forward/Reverse Proxy

-0001-11-30   Views:3

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I am trying to setup reverse and forward proxy using TMG 2010. I have following networks: Internal Networks: 10.2.1.0/24 10.3.1.0/24 DMZ (Perimeter) Network: 10.7.1.0/24   NAT relationship with external network e.g. Public IPs I've setup one TMG node

I am trying to setup reverse and forward proxy using TMG 2010. I have following networks:
Internal Networks:
10.2.1.0/24
10.3.1.0/24
DMZ (Perimeter) Network:
10.7.1.0/24   NAT relationship with external network e.g. Public IPs
I've setup one TMG node and selected "Back Firewall" as topology.
NIC 1 Config: (Internal)
IP:    10.2.1.20
Subnet: 255.255.255.0
DW:     Not defined
DNS:    10.2.1.5
NIC 2 Config: (Perimeter)
IP:    10.7.1.20
Subnet: 255.255.255.0
DW:     10.7.1.5
DNS:    Not Defined
During setup when wizard asked me to define internal IP ranges, I defined 10.2.1.1 - 10.2.1.255 instead of selecting Adaptor.
Setup Completed successfully.
I created Allow rule from internal to local host.
From Client-end:
From client machines i can not access TMG internal interface IP (because gateway is not defined on TMG internal interface i guess)
while i can access DMZ interface IP i.e. 10.7.1.20 and can telnet port 8080.
When i define DMZ interface IP i.e. 10.7.1.20:8080 as proxy address in client-side browser, that throws an error "10061 no connection could be made because the target machine actively refused it"
Failed Connection Attempt
Log Type: Web Proxy (Forward)
Status:10061 No connection could be made because the target machine actively refused it.
Rule: Allow
Source: Internal (10.2.1.39)
Destination:LocalHost (10.7.1.20:8080)
Request:Get http://www.google.com
Protocol:http
On TMG server:
When i define DMZ interface IP i.e. 10.7.1.20:8080 as proxy address in browser that still throws an error "10061 no connection could be made because the target machine actively refused it"
But when i define internal interface IP as proxy in browser i.e. 10.2.1.20:8080 it works.
Allowed Connection
Log Type: Web Proxy (Forward)
Status:303 Not Modified
Rule: [System] Allow all HTTP traffic from forefront TMG to all networks (for CRL downloads)
Source: LocalHost (10.7.1.20:10082)
Destination: External (94.245.34.74:80)
Request:Get http://someurl
Protocol:http
What am i missing please advise and what could be the work around to get this work from internal network.
Regards,

The replay answer
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Hello Quan,
Thanks for your reply..
No it didn't work. I'm still using that as reverse proxy and unable to configure that as forward. :-)
Regards,
Farrukh

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