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Oracle and a Multihomed Proxy Server.

By jerry ·
I am trying to communicate between an Oracle OAS server connected to the external NIC of my MS Proxy Server 2.0 to an Oracle Server v7.x located on my internal network and the private NIC in the Proxy. Proxy works great for surfing the web, but I cant ping the Oracle server from the OAS Server. The Proxy has two NICs. The first has a public IP address/mask/gateway, the second has a private ip etc. The OAS server has a public IP/mask/gateway. The Oracle server is inside my private network connected to the private NIC. However, the Oracle server has a public IP/Mask/Gateway assigned to it per OAS requirements. The Oracle server has the same mask as the OAS Server and has an IP address defined on the same subnet as the OAS Server, ie xxx.xxx.xxx.999 The gateway on the Oracle server has been set to the IP address of the Public NIC in the Proxy server. I am not getting any kind of communication between the two. HELP.

Thanks

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Oracle and a Multihomed Proxy Server.

by jerry In reply to Oracle and a Multihomed P ...

Some additional info. From the Proxy Server console I can ping both the Public NIC and the private NIC within the server itself. I can also ping the OAS server located on the Public side of the Firewall, but I cannot ping the Oracle server locatedon the private side of the firewall. From a workstation within the private network, which has a private IP, I can ping the private IP Nic in the proxy server, but not the public IP Nic. I cannot ping the Oralce server Public IP even though it is within my private network, whereas befor I gave it the public IP I could ping it.

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Oracle and a Multihomed Proxy Server.

by jerry In reply to Oracle and a Multihomed P ...

Point value changed by question poster.

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Oracle and a Multihomed Proxy Server.

by brian In reply to Oracle and a Multihomed P ...

You cannot use ping with an internal client

The Proxy winsock service support both UDP and TCP packets. It does NOT support ICMP packets. Applications like Ping and Nslookup rely on ICMP packets so it is NOT possible to use them with the winsock service. There is nothing an admin can configure on the proxy to change this, the service was just created to work this way.
So what does happen?

When you attempt to ping a host from an internal client you?ll notice that the name does resolve,but you get a destination host unreachable. That is completely normal and expected. The name resolution part of the ping relies on DNS which is supported. The actual sending and receiving of an ICMP echo request is what should fail (destination host unreachable).


To read more about this see the following MS FAQ article:
http://support.microsoft.com/support/Proxy/FAQ/Apps/102.asp

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Oracle and a Multihomed Proxy Server.

by jerry In reply to Oracle and a Multihomed P ...

OK, but how do I get them to communicate through the proxy?

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Oracle and a Multihomed Proxy Server.

by jerry In reply to Oracle and a Multihomed P ...

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