- GNS3 LINUX DUPLICATE PACKETS TUN0 HOW TO
- GNS3 LINUX DUPLICATE PACKETS TUN0 INSTALL
- GNS3 LINUX DUPLICATE PACKETS TUN0 SOFTWARE
- GNS3 LINUX DUPLICATE PACKETS TUN0 SERIES
However, with multiple tun/tap interfaces, a routing protocol on the host machine is more flexible and reliable.
GNS3 LINUX DUPLICATE PACKETS TUN0 HOW TO
Many articles are available describing how to configure static routes for tun/tap interfaces. This may not be a issue at home, but is when connecting a laptop host to other networks. Each Gateway's connection runs OSPF to share routes with the host using Area 192.168.0.0 - the wireless LAN interface - and must be secured (this network uses the FWBuilder application to configure IPTables) because they are exposed to the wlan0 network. In the illustration above, the top part depicts how the Debian Linux Gateways - with eth0 bridged to the host's wlan0 interface - require additional security. Converting to host machine tun/tap devices and GNS3 clouds frees up that memory for other purposes.ĭebian Linux Gateways also present additional security issues. These work well, but four of them use 640 - 768 MB memory, not insignificant, when (by comparison) a Linux VirtualBox Nagios, Icinga or Zabbix server requires only 512 MB memory. These Gateways require 160 - 192 MB memory each and each machines eth0 interface is VirtualBox bridged to the host machines wlan0 interface.
GNS3 LINUX DUPLICATE PACKETS TUN0 SERIES
Previous articles in this series have used Debian Linux VirtualBox Gateways to connect GNS3 networks to the host machine and Internet. Some variation of that command is required for masquerading.Ĭonfiguring OSPF Routing between the Host Machine and GNS3 Networks Post-up iptables-restore < /etc/iptables.up.rules The files /etc/iptables.up.rules generated by webmin is: Webmin's firewall module adds a line invoking the IPTables rules under the loopback device configuration: Recall also the tun/tap devices are configured in the rc.local file. The /etc/network/interfaces for the host laptop only configures a loopback device at boot time. This typically - but not always - applies the NAT. In the subsequent screen, select the Masquerade radio button and change the Outgoing Interface section from to Equals and select interface wlan0 as illustrated below. NAT is a Post Routing action, so click Add Rule under the Packets After Routing (POSTROUTING) section. In the upper left, select Network Address Translation (NAT) from the Showing IPTable pull-down menu. Under the host's Webmin interface, navigate to Networking and select Linux Firewall. For this example, the Webmin Firewall interface provides a graphical configuration tool to use the host wireless interface wlan0 for NAT masquerading. Once configured and executed, ifconfig will list devices tun0, tun1, tun2 and tun3.Ĭonfiguring Network Address Translation Masquerading on the Host Machine There are numerous articles describing Network Address Translation (NAT) masquerading available. The rc.local file is executed at boot time and configures persistent tun/tap interfaces.
GNS3 LINUX DUPLICATE PACKETS TUN0 INSTALL
Sudo apt-get install uml-utilities bridge-utils
GNS3 LINUX DUPLICATE PACKETS TUN0 SOFTWARE
Sudo setcap cap_net_raw,cap_net_admin+eip dynamips Creating Persistent tun/tap InterfacesĪdditional software is required to create the logical interfaces for cloud devices.
Change to theĮxecutable's directory (/usr/local/bin) and run the following command: Have the correct permissions for tun/tap devices. You install dynamips from source on Ubuntu, the executable will not
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