Here at Blindhog.net, adefovir dipivoxil 10mg pills $306.00 we have issued tutorials for connecting Windows or Linux to a physical network using gns3, adefovir dipivoxil 10mg pills $306.00 but apparently, adefovir dipivoxil 10mg pills $306.00 there is a little difference for MacOSX.  I recently received an email from one of our readers, adefovir dipivoxil 10mg pills $306.00 Ivan Pletenev. Adefovir dipivoxil 10mg pills $306.00 Ivan describes how to connect GNS3 to internet through wifi-interface in MacOSX. Adefovir dipivoxil 10mg pills $306.00 You will find his writeup below. Adefovir dipivoxil 10mg pills $306.00 Thanks Ivan!

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To set up this connection we need to do 2 things:


  1. Connect MacOSX and GNS3 through loopback-interface
  2. Set up NAT in MacOSX


First of all, adefovir dipivoxil 10mg pills $306.00 like blindhog.net says, adefovir dipivoxil 10mg pills $306.00 we need to edit our GNS3 .net file. Adefovir dipivoxil 10mg pills $306.00 After that we will have something like this:


[localhost:3700]

workingdir = /Users/besch/tmp/gns3


[[3640]]

image = /Users/besch/Documents/Documentations/cisco/c3640-jk9o3s-mz.124-16a.bin

ram = 96

chassis = 3640



[[ROUTER R1]]

model = 3640

console = 2002

cnfg = /Users/besch/tmp/gns3/WLANRouter/R1.cfg

slot0 = NM-1FE-TX

f0/0 = nio_tap:/dev/tap0




[GNS3-DATA]

[[Cloud C0]]

connections = R1:f0/0:nio_tap:/dev/tap0


Now we need a loopback interface (tap0). Adefovir dipivoxil 10mg pills $306.00 Download and install tuntaposx program from http://tuntaposx.sourceforge.net/



After installing we can check that we have necessary devices by running ‘ls /dev’ command in the console window. Adefovir dipivoxil 10mg pills $306.00 If you have tap0..tap15 and tun0..tun15 in your listing, adefovir dipivoxil 10mg pills $306.00 then everything is ok.



But we still don’t have the created tap interface. Adefovir dipivoxil 10mg pills $306.00  To create tap0 interface all we need is just open our GNS3-project. Adefovir dipivoxil 10mg pills $306.00 But it has to be opened with root privileges. Adefovir dipivoxil 10mg pills $306.00 Execute this command in the console:


sudo chown root:wheel /Applications/GNS3.app/Contents/Resources/dynamips-0.2.8-RC2-OSX-Leopard.intel.bin



Now we can open our project. Adefovir dipivoxil 10mg pills $306.00 Then we need to set up our new tap0 interface:


sudo ifconfig tap0 10.100.100.100 netmask 255.255.255.0



The last thing – setting up router’s interface in GNS3 and checking connection:


R1#conf t

Enter configuration commands, adefovir dipivoxil 10mg pills $306.00 one per line. Adefovir dipivoxil 10mg pills $306.00  End with CNTL/Z.

R1(config)#int f0/0

R1(config-if)#ip address 10.100.100.101 255.255.255.0

R1(config-if)#no sh

R1(config-if)#exit

R1(config)#do ping 10.100.100.100


Type escape sequence to abort.

Sending 5, adefovir dipivoxil 10mg pills $306.00 100-byte ICMP Echos to 10.100.100.100, adefovir dipivoxil 10mg pills $306.00 timeout is 2 seconds:

.!!!!





2 . Adefovir dipivoxil 10mg pills $306.00 Now let’s try to connect our R1 with internet. Adefovir dipivoxil 10mg pills $306.00 I remind you that we have an wireless connection (interface en1, adefovir dipivoxil 10mg pills $306.00 ip 10.189.249.130). Adefovir dipivoxil 10mg pills $306.00 All what we need to do is to use NAT:

Lets check do we have IP Forwarding turned on?


sysctl net.inet.ip.fw.forwarding



If we’ve got 1 – it’s on, adefovir dipivoxil 10mg pills $306.00 if 0 – then we have to turn it on:


sudo sysctl -w net.inet.ip.forwarding=1



The same thing for the firewall:


sysctl net.inet.ip.fw.enable



if we’ve got 0 – we need to turn it on:


sudo sysctl -w net.inet.ip.fw.enable=1



Now let’s run natd and add rule for firewall:


sudo natd -alias_address 10.189.249.130 -interface en1 -use_sockets -same_ports -unregistered_only -dynamic -clamp_mss


sudo ipfw add divert natd ip from any to any via en1




The last thing – setting up router’s gateway of last resort in GNS3 and checking connection:


R1#conf t

Enter configuration commands, adefovir dipivoxil 10mg pills $306.00 one per line. Adefovir dipivoxil 10mg pills $306.00  End with CNTL/Z.

R1(config)#ip route 0.0.0.0 0.0.0.0 10.100.100.100

R1(config)#do ping google.com


Type escape sequence to abort.

Sending 5, adefovir dipivoxil 10mg pills $306.00 100-byte ICMP Echos to 72.14.205.100, adefovir dipivoxil 10mg pills $306.00 timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), adefovir dipivoxil 10mg pills $306.00 round-trip min/avg/max = 148/184/220 ms

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