You are getting switching loops because you have connected the 2950 back to itself in a couple of places.
In order to translate internal addressess to external you need a device that can perform Network Address Translation, I would suspect this would be your proxy-server.
The 2950 switch is not capable of Layer 3 Routing operations, so if you want to route between your three VLAN's you will need some other device to do so.
What I would suspect you want to do is connect one of your D-link switches to the CPE Internet device, then connect the "Outside" interface of your Proxy-Server to the the D-Link , and the "Inside" interface to the 2950 in VLAN2. All devices with Real-IP addresses should be connected to this D-link switch. DO NOT give the switch an internet address.
Connect another port on the 2950 VLAN2 to the remainder of your Office LAN.
If possible, install a third interface in your Proxy-Server, and connect this to the 2950 in VLAN3, and connect all your Private-Network devices to the 2950 in VLAN3.
In this scenario, the Proxy-Server is acting as a firewall, protecting the "Inside" network and the "DMZ" (VLAN3) from the internet on the "Outside". If it cannot provide this finctionality, then you should really get a device that can.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...