Install GNS3 on cloud(Azure VM, EC2, etc).

README.md

GNS3 Guide

1. Install GNS3 on Remote server (Azure, AWS)
2. Install GNS3 on Local machine (Linux)
3. Create GNS3 Topology
4. Cretae GNS3 Cisco Topology

Useful References

• https://www.freeccnaworkbook.com/workbooks/ccna/interface-ip-address-configuration
• http://journey2ccie.blogspot.com/2010/02/gns3-install-and-configure-vpcs-to-use.html
• https://binarynature.blogspot.com/2015/11/install-configure-gns3-arch-linux.html
• https://protechgurus.com/how-to-use-vpcs-in-gns3/
• https://www.learncisco.net/courses/icnd-1/lan-connections/configuring-a-router.html
• https://imtiazrahman.com/2016/11/17/how-to-login-cisco-router-with-ssh-key/ (####)
• https://gns3.com/community/featured/error-while-setting-up-node-virb

create_cisco_topology.md

Create Cisco Topology

To configure a Cisco topology, you must first add IOS images to GNS3. Watch this video to understand how to add images and setup Cisco topology.

Example 1: GNS3 topology consisting of two Cisco routers

The official document explains to configure a simple GNS3 topology consisting of two Cisco routers.

Example 2: Set-up Cisco router configuration to receive/forward data packets between computer networks

Final topology snapshot:

Open console for respective node and copy following commands.

PC1 configuration:

ip 192.168.10.1 255.255.255.0 192.168.10.2

PC2 configuration:

ip 192.168.20.1 255.255.255.0 192.168.20.2

Router(R1) configuration:

ip address of interface fa0/0 will be same as default Gateway(192.168.10.2) of PC1.

Router>enable
Router#conf t
Router(config)#int fa0/0
Router(config-if)#ip address 192.168.10.2 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#int serial0/0
Router(config-if)#clock rate 128000
Router(config-if)#ip address 192.168.30.1 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#ip route 0.0.0.0 0.0.0.0 192.168.30.3
Router(config)#exit
Router#wr

Router(R2) configuration:

ip address of interface fa0/0 will be same as default Gateway(192.168.20.2) of PC2.

Router>enable
Router#conf t
Router(config)#int fa0/0
Router(config-if)#ip address 192.168.20.2 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#int serial0/0
Router(config-if)#clock rate 128000
Router(config-if)#ip address 192.168.30.2 255.255.255.0
Router(config-if)#no shut
Router(config-if)#exit
Router(config)#ip route 0.0.0.0 0.0.0.0 192.168.30.3
Router(config)#exit
Router#wr

Test the topology :

• From PC1 ping 192.168.20.1(PC2)
• From PC2 ping 192.168.10.1(PC1)

Both should be able to ping sucessfully

References:

• https://www.youtube.com/watch?v=52tbNuHX2G8

create_gns3_topology.md

Create GNS3 Topology

If the installation was successful you can access VPN at http://172.16.253.1:3080/. Follow these steps to create your first topology.

Work in progress ...

install_local_server.md

Install GNS3 on Local Linux Machine (Ubuntu 16.04)

Steps:

1. Install Dynamips and Ubridge

   sudo apt install dynamips ubridge
   

   • Verify installation

   dynamips
   ubridge -v
   

2. Install Virtual PC Simulator(VPCS)

   • Download vpcs and extract the zip.

   cd vpcs-0.6.2/src
   ./mk.sh 64 # i386 | amd64 | 32 | 64 ---> mention any of the option
   sudo mv vpcs /usr/local/bin
   

   • Verify the location and version for VPCS

   which vpcs
   vpcs -v
   

3. Install QEMU

4. Install Docker

5. Install Wireshark

6. Install GNS3 Create a python virtual environment and install gns3-server, gns3-gui and other dependencies inside virutal environment:

   python -m venv ~/.gns3-venv
   source /home/user/.gns-vnev/bin/activate
   pip install -U gns3-gui gns3-server PyQt5-sip pyqt5==5.14.0
   

   The steps to install other dependiences ar not mentioned here. Please check official documentation to install all dependencies.

7. Launch GNS3 gui with command:

   gns3
   

   If installation was successful, it will launch the application.

Errors:

Error 1

2020-12-17 19:48:15 CRITICAL topology.py:258 uBridge is not available, path doesn't exist, or you just installed GNS3 and need to restart your user session to refresh user permissions.

Restart your machine or change ubridge permissions using following command:

sudo chmod 777 /usr/bin/ubridge

Error 2

No path to a VPCS executable has been set

Download vpcs. Go to Edit > Preferences > VPCS Preferences > Set Path to a VPCS executable. You may need to restart GNS3.

install_remote_server.md

Install GNS3 on Cloud (Azure VM, EC2, etc)

Steps:

1. Create the remote server

• To create a Linux virtual machine in the Azure portal follow these steps.

• To create Amazon EC2 Linux instance follow these steps.

2. Open port 1194 for the remote server.

3. Install GNS3 on a remote server Commands:

   cd /tmp
   curl https://raw.githubusercontent.com/GNS3/gns3-server/master/scripts/remote-install.sh > gns3-remote-install.sh
   bash gns3-remote-install.sh --with-openvpn --with-iou --with-i386-repository
   

   Explaination for commands is provided here.

4. Download the certificate. You can also find the certificate in /root/client.ovpn. You can also use scp command. First copy /root/client.ovpn to /home/<remote_user>, then you can use scp to copy it locally.

   scp <remote_user>@<remote_ip>:/home/<remote_user>/client.ovpn client.ovpn
   

5. VPN connection on local Linux

   sudo apt-get install openvpn
   sudo openvpn --config client.ovpn --auth-retry interact
   

6. VPN connection on Windows Download and install OpenVPN for Windows.

   • Click on “Show Hidden Items” in the Taskbar
   • Right-click on “OpenVPN-GUI”, and select “Import file”
   • Select the .ovpn file you downloaded, and click “Import”
   • Right-click on “OpenVPN-GUI” again, and select “Connect”

7. If the VPN works, this page should work: http://172.16.253.1:3080/