![]() Let us presume LAN segment is: 10.10.10.0/24 from now on.ĭisable firewall on Windows 7 machine if FW is on - this is what is blocking the communication when it comes to R2 to Win7 communication. Of course, configure Ubuntu workstation to have address range from your LAN segment. Ubuntu on VMware should use Bridged network (as we would like to use the same network as our GNS router does). I actually have run into lots questions so far and (assuming this is not off-topic) plan to create a series of posts after this.Ĭan I ask you why you connect your Ubuntu to MS loopback?Īnd the second thing, why is R1 that is connected to MS loopback network having IP address from your LAN IP range (10.10.10.170/24)? This will not work for sure. Why can't R1 and R2 see my real LAN? What am I missing here? Still for both R1 and R2, the ping on 10.10.10.167 (the regular ethernet adapter of the GNS3 host) and the loopback adapter 169.254.230.131 has no success. I've set the Gateway of last resort to 10.10.10.252 which is the actual default gateway for the real LAN which my GNS3 host is on. ![]() Sending 5, 100-byte ICMP Echos to 10.10.10.167, timeout is 2 seconds: The problem is that neither R1 nor R2 can ping the Windows 7 host (running GNS3) 10.10.10.167 as shown for R2 below (the console of R1 and R2 are basically the same). : 192.168.129.1Įthernet adapter VMware Network Adapter VMnet8: : 10.10.10.252Įthernet adapter VMware Network Adapter VMnet1: An nmap scan from this same host, with target set to its default gateway of 10.10.10.252 says that we have a Cisco router (but I don't have physical access to know what model it is). ipconfig shows that the Windows 7 host (running GNS3) has IP 10.10.10.167. R1 is connected to the Microsoft Loopback adapter (C1), and R2 is connected to the normal Ethernet adapter (C3) as shown in the topology below. The same host also runs a VMWare Ubuntu 10.0.04 guest. A single instance of GNS3 runs on a Windows 7 Enterprise host. LAN 1 is not connected to the internet and is completely wired Ethernet. The GNS3 network is connected to a real network, let's call it LAN 1. Now I have set it up lets see if it improves my experience.I am building a lab environment for CCNA training, using GNS3. GNS3 although is always hard to work with, but still remains the best tool in my learning journey, and I always wanted to setup client server mode in GNS3 because of its resource consumption issues. Once all this done I see server is connected to my GNS3 on client, you can see this in Server Summary section on GNS3, and the below topology is running on Server which I am managing from Macbook client. I did not check the authentication as I am not using it, you can use it.And for that below are the configurations. Now as a last step, we need to tell client to use server to run projects. So I preferred adding below rule in my server firewall. So we must have rules to allow tcp connections from client to server over these ports.Since there is a range of ports to add hence the easiest method to add the complete local subnet or the specific IP from where you are trying to connect to server. In first step the client will connect to GNS3 server over port 3080 and then the console connections will occur on port 5000 to 10000, all TCP. Now looking at the above screenshot, you might have guessed that there will be two phases in the connection. The “Console port” and “UDP tunnel port” ranges are populated by default. ![]()
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