I have a small domain network .Where i install ISA server 2004 as a proxy server with single NIC card. That server is nated with public IP. We have two ISP for internet & using RADWARE as loadbalancing purpose.As per our network architecture all the client traffic will go to internet through ISA proxy----internet router----RADWARE(Load balancing betwen two ISP). when i use ISA as a proxy in server or client it gives Error Error code: 12206 Background: The page you requested could not be reached. But without proxy I can access internet (as the ip is already nated) from the server. Please help me to solve the issue. Thanks in advance..
To help you we're going to need a little more information. If you can expand on your ISA NIC specifics such as DNS and GW, IP ranges properly defined for ISA Internal Network properties and access rules configured to permit access. With one NIC you are limited to Web Proxy client access only. The other issue that I can possibly see is with having dual GW access, but that would be dependent on the Radware which I’m not familiar with. Typically, ISA does not support dual GW access.
RB
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David Melvin Ohio MCSE: Security 2003, MCSA:Security 2003
Thanks for the reply. I have used global DNS (4.2.2.2) & gateway is the core switch . Moreover i have defined a single policy which allow all Outbound Traffic. The main thing is that i am able to access internet when i am not using proxy( Without change my network configuration),Because my server is already nated(Dynamicaly). But when i used proxy(ip of ISA server) it gives error 12206. Another limitation is that all my internet cable terminate at RADWARE & single cable come out to LAN Zone .So i can`t use another NIC card with any public IP. All the nating part has been done on RADWARE console
have a small domain network .Where i install ISA server 2004 as a proxy server with single NIC card.
Ok, after I reread your OP I have discovered part of the problem that I must have overlooked. As I mentioned, you will need TWO NICS in order for SecureNAT access to work. Using Firewall client the same applies. With running in "HORK" mode (single NIC) the ISA firewall service is disabled. Furthermore, SecureNAT access requires an Internal DNS forwarder to be configured because the client takes on the responsibility for DNS queries and resolution for itself. With a single NIC installation your only option is the Web Proxy client. DNS is probably another issue you will need to address.
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David Melvin Ohio MCSE: Security 2003, MCSA:Security 2003
Thanks for your reply. I want to to install ISA 2004 ,only as a Web Proxy.I think DNS is the main issue which you mentioned in your last post.Because from the monitoring dashboard , it shows DNS is not configured. So how can i configure internal DNS forwarder, Pls help me.
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