GNS3 Talks: Use the NAT node to connect GNS3 to the Internet easily!
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- Опубліковано 10 вер 2024
- Starting with GNS3 2.0 a NAT node is available. This node allows you to a connect a GNS3 topology to the Internet via a NAT. But your topology is not accessible from the internet.
It’s useful when you need to download stuff from internet (package, licence check…). And it’s easier to use than the Cloud node.
The NAT node require the GNS3 VM or a Linux computer with libvirt installed. By default the NAT node run a DHCP server that will give you an IP in the range 192.168.122.0/24.
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Thank you so much! With the help of this video, I was able to get my first subnet to connect to the internet. Your videos on GNS3 have been invaluable to me!
Returning to the old David bombal videos again to troubleshoot my GNS3 hahah!!! it never gets old!!! thank you again
Dear David,
It is amazingly straightforward learning network engineering from you. Your instructions are to the point, making my efforts unscattered. It's a true privilege, Sir.
That part with setting up NAT was terrifying. Like watching a magician at work, man. You just ended my month-long misery.
Like I spent last 20 years coding in C++ and Cisco IOS is just seriously fucking with my mind.
Thank you on this Tutorial Sir David now I can try to config HSRP and using NAT Cloud
Thank you Sir. Now I understand why my 4 routers couldn't access the Internet because I was missing the NAT part. Thanks again for the great job. From Congo/Africa.
Thank you again David for these videos. They are really helpful and you're teaching methods are easy to follow and understand. Please do keep them coming!.
Thanks for the feedback Paul.
Dear Dave, you are such a wonderful human being.. it really helps! Thanks a lot
Simple and well explained clip and it helped me connect my GNS3 topology to the internet easily :) . Thanks for all the amazing content David.
Glad you got it working Sheldon
Thanks. Solved long issue with GNS3 VM not green and NAT connection to internet.. Great
Thank you David, funny it was you that fixed this problem for me. Loving your Udemy Ansible course btw!
Hello Sir, Thank You so very much for this short, clear and complete configuration lecture. Also Thank You for Your description note mentioning how it's useful and it's restriction in the lab.
Thank You So Much Sir. You just simplified everything.
Thank you, my damn NAT finally works across my routers :) .
thank you very much for your time and hard work. you're great, god bless you
Thank you so much David! I've watched two of your tutorials, and both times you solved my problems! You're great!!!!!!
Awesome, I'm happy to help Alfredo!
Thank you Sir. It was quite helpful!
Easy when you know how, thank you David!
Thank you, Raymond!
Able to resolve name from core-rtr directly connected to nat cloud but internal router can't resolve name yet can ping all addresses on core-rtr. I've done everything on both routers, redistributed default route in eigrp, advertising all networks, nats done and applied inside outside. Also configured ip domain-lookup as well as ip name-server 😒 still inside router can't resolve name but core-rtr can.
Sir, Hope you are doing well
I am facing below mentioned issue while draging NAT node in GNS3 ,
" Error while creating node from template: NAT interface vmnet8 is missing. You need to install VMware or use the NAT node on GNS3 VM "
Looking forward to hear from you soon.
Thanks in advance for your consideration.
Thanks sir David this was very helping
Great information and instructional video. Thanks David.
Thanks Jeff!
Hi David,
When I try to add NAT device in GNS3 VERSION 2.1.8, it throws error:
Error while creating node: vmnet8 is missing. You need to install VMware or use the NAT node on GNS3 VM.
I wanted to see how did you configure the NAT cloud my laptop has a running internet connection but i need to know the configs you add to the vmnet..?? for the NAT to be working.. HELP
Just an FYI, when you place the NAT in the topology you must choose the local PC instead of the VM server for this to work. Or at least in my case that is what I finally had to do after a few hours of troubleshooting. That part is not explained in this video.
You are the man :) it worked for me.. Saved me from my mysery :D
Exactly! Choosing VM as server for NAT cloud would not allow to pass DNS resolves through FIRST router in chain. Beware!
@@Podranok This is exactly my issue. How do I fix this? And I want to use VM server instead of local PC
Thanks for the video, it's very informative.
Please make the video to monitor this network through OpenNMS.
Getting error when try to ping
Translating "www.google.com"...domain server (192.168.122.1)
% Unrecognized host or address, or protocol not running.
ip domain-lookup enabled but didn't worked also tried ip name-server but same result.
I have also the same problem. then i updated my gns3 to 2.0.1 and it was working. Try updating yours.
Jigar Gheewala worked for me too after updating to version 2.0.*.
"ip domain lookup" command will help
thank you.
@@L-81 thank you brother, it really helped me.
This process does not work for the GNS3 ESXi image.
Any recommendations?
is it possible to use this to allow incoming connections to your devices? I'd love to SSH into my devices remotely. How would I configure Port Forwarding?
@David Bombal: Can you please tell me how to reach these routers in GNS3 Topology from my Ansible Server running on AWS EC2?
je veux ajouter virtualbox a gns3 pas le virtualbox de gns3 et sur gns3 voila l'erreur que je rencontre error while saving setting GNS3:VM "vm" must have a NAT interface configured in order to start
this video save my day
thx David, u r genius
Thank you so much! Very helpful and explained very well!
You're very welcome Brandon! Thank you for the comment.
Dear David, I have a question regarding NAT mode: Is it possible to set *ip nat inside* on 2 interfaces, like for example on both FastEthernet2/0 and FastEthernet1/0?
Bombal
you are a great man , thank you very much man
Thank you!
Thank you so much
Thank you David!
Could you explain where is a DHCP server? Can I assign static ip address without usin DHCP?
Are there any known bugs with NAT on a c7200 connected to the NAT device? My NAT configuration just does not work with the NAT device but it works if I connect to another regular router.
Very useful video, I didn't catch up configuring access list 1 thou
Hi, I used you, I use this appliances, when I put a switch and an ubuntu desktop behind router 2, I ping all web page, but I can't do an apt-get and all web page can't open. I am open to any advices.
hello david i ahve GNS3 2.0.3 version but the problem is i am not able to connect to internet. i have done everything the way u have shown DHCP is working. but when i ping any web url such as ping google.com i am getting an error..Unrecognize host or address or protocol not running.. ??? Please help! :)
Hi David, I am running GNS3 Ver 2.1.11 and I have the same like you here, my router gets a dhcp ip and I can ping the dgw, but I cannot ping the internet
can you tell me what is wrong that I am doing or missing?
Router#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
UU.U.
I tried this and it works but, if I plug a switch and PCs and set them IPs, the PCs won't be able to ping domains nor internet IPs. Only ping G0/1 Why?
hi DavidI have few questions, how is it possible to bridge NAT or cloud to my home network(like the way to bridge in older versions), when I connect my router interface to nat device ,how can I get another ip range instead of 192.168.122.x I mean how can I disable DHCP or adjust it to other range? how can I use cloud device to bridge GNS3 devices to my real network?thanks in advance
Hi Davidmy host laptop is connected to a Cisco switch and the switch trunked to a Cisco router, my router is a DHCP server for few of my VLAN's, how can I get a DHCP offer from my cisco internet router instead of automatically integrated DHCP server from GNS3? thx in advance
Okay so R1 can ping 8.8.8.8 through the NAT cloud no problem but my VM can't. My VM can ping the default gateway (R1's fa0/0 which is 10.1.1.1) and the router's outside local IP (the "public" DHCP assigned address which is R1's fa0/1 at 192.168.122.127) but my VM can't get out to the internet. It can't ping 192.168.122.1 which I think is the NAT cloud IP?. sho ip nat translations are empty. Not sure what's wrong.
Hi David! Just to test the NAT cloud... I connected the VPCS in GNS3 to the NAT cloud and configured eth0 on the VPCS using ip dhcp command to get an IP... Unfortunately is didn't get an IP. DO you know if the VPCS can get an IP thru DHCP?
Thank You Mr. David
You're welcome. Thank you for watching!
Were you connected to wireless network or wired network ? coz on wireless network , when i do the same it doesnt work .....is process same for wired and wireless , do i have to create Tap interfaces and doing iptables Nat ing on the host pc/lappy.
It is recommended that you use a wired network. There are lots of issues with wireless network cards. I was using a wired connection in the video.
Thank you very much!
Thank you for an amazing and well-simplified tutorial. I would like to ask, what if I connect a FortiGate Firewall behind the Cisco router and try to access internet on the firewall device? I have a topology built already and NAT is configured on the Cisco router but I am unable to ping Google DNS or even the IP of NAT cloud. Unsure if there is any specific command I need to put on the firewall to make that happen. I can only ping the Cisco router's IP on the same subnet (10.x.x.x/30 which I have assigned) but not any other network.
If select clude node instate of Nat node
The router which any interface connect beside cloude node
David is it possible to import a VirtualBox macinhe to GNS3 and from it connect one of its port to the GNS3 network topology and another to my local network directly , without NAT? If yes, can you do a video about it, regards
First of all I would like to thank you for this great tutorial . I have a question - I can ping the host machine from the devices from GNS3 but I can't ping or access the gns3 devices through host machine, Is there any solutions for this? Thank you
thank you so much sir
Sir David, tks so much for this great video, unfortunately i used the same Router as you and i can't ping with DNS name... evertyhing is ok except the dns, what to do to force a new one like google 8.8.8.8
Great info! Thanks!!
Great video, only question I have is how do you troubleshoot this if it does NOT offer an ip address? I see my interface go up/up but no ip assigned. Any suggestions?
You can take a packet capture on GNS3 by right clicking the cable.
@Barackuse don't use wi-fi, try again when you have a wired connection
Great Video Sir
Hi Sir, can you make a Video of the Latest GNS3 connection to a Local machine. It was obvious with the Loopback interfaces but the latest GNS3 may have that feature but can't figure it out.
Nice lab , the second router you placed , if you place a webterm docker container instead , how to configure the pat router and webterm(containing firefox browser) , that inorder to ensure reachability via web browser...i coudnt figure it out...i tried everything...if anybody know pls advice me.
I have a problem actaully following this tutorial, I got my inside connect to google, but if I want to go directly to google from a pc connected to the inside router go to google, does not actually works
How far can you ping from the PC on the inside? Do you have the nameserver and a default gw setup on the PC?
Everything works except getting online. Not sure I understand how nat works here. I'm on wifi not sure how the nat knows how to get online.
Thank you
Choosing GNS3VM as a server for NAT cloud would not allow DNS resolves to pass through FIRST router in chain. Beware and choose your local machine! And 7200 images are not working well with NAT, use something else.
Thanks man
Hi, Mrs Bombal. I need help for having cisco ios on gns3. Is there a link or documentation that i can use. Feel good!
There are links on Google. But officially you have to pay for Cisco ios
@@brianconner1212 Thank for answering! I tried but nothing. I'll try again.
If there are 3 or 4 routers then we have to configure nat on every router
maybe a step by step guide how to configure NAT cloud
Thank you, your videos really help. Can you please make one about how to use Cloud node (GNS3 2.2.11 on linux) to connect GNS3 topology to Internet. In the same time the topology must be accessible from Internet by an outside PC? I'm stuck with one of your ACL_Lab on Udemy (I'm doing all Labs on GNS3 instead of packet tracer). Or you can advise me courses that go deeper with gns3 software.
using this NAT cloud I am able to ping all my physical devices however none of them (the physical devices) are able to ping any of my GNS routers nor can they ssh to them. why is that?? what am i doing wrong? do I need to use an appliance?
Please watch this series: ua-cam.com/video/Gpje9PV1j8U/v-deo.html
Thank you!! this link worked perfect for me.
I took the python course and realized that instead of working with the Ubuntu Docker Container I can now connect to all my GNS3 routers using my local physical Ubuntu. This way I do not need to constantly reinstall python nor it's modules.
but without being too philosophical.... I think the name for the 'NAT cloud' is a bit confusing. it is acting more like a 'PAT cloud' than a NAT (not fully PAT... but like one...).
correct me if I am wrong.
Thanks again!!
GNS3 have the network automation container which is recommended instead of the Ubuntu container as it has Python and other tools preinstalled (It did not exist when I created the course, but was created because of the course).
does VIRL support STACK switch ?
Anyone have info on what to do if you are behind a proxy?
hi , it works ! but in my tepology i have more than 2 routers and i have an osfp the 2 first routers can ping to google but the other ones doesnt and they can ping to the router ( behind the nat ) but google not :/ can u pls help?
Please ask this in the GNS3 community here: gns3.com/community
okey :D thanks
Hello. I used Ubuntu VM connected to router instead of R2 and i have a problem. I can ping 8.8.8.8 but I can not ping www.google.com. Where is the problem please ?
If the routing works (the Ubuntu VM can ping 8.8.8.8, but not resolve DNS names), something you could try in it would be to run this command: echo 'nameserver 8.8.8.8' >> /etc/resolv.conf
i did run it , doesnt solve the porblem :/
ty anyway
@@moatez1605 I am getting the same error. Did you get it working? thanks
@@rohanpunj94 just get "nameserver 8.8.8.8" (Without the Quotes symbols) into the file /etc/resolv.conf, there might be couples of commands like that, so make sure that the others commands inside the file follows the same syntax.
Sir, Totally excellent video information. Can there be video a demonstrating small enterprise video with cisco routers, pfsense firewall, ISP cloud, vm windows server, virl switches, and vm windows clients. from start to finish in hour or so long explanation. Thanks in Advance.
Thank you! That is a lot of devices and really shows what is possible in GNS3 :)
Great! Thanks, Mr. David!
If I want to connect another router to the NAT cloud, I must add another NAT adapter on VMWare, so that way there would be a second interface to use?
The NAT object uses the qemu0 interface of the GNS3-VM (which is bridged to it's second vNIC set to vmnet8, I believe), so there's no need for an additional interface in VMware. Using the NAT object with GNS3 natively in Linux will automatically bridge it to eth0, as well.
My not happening don't know what problem
Hi David, can we change the default IP provided by the NAT node?
It's possible, but I wouldn't necessarily do it, since you'll need to edit the interfaces in the GNS3-VM itself, and it could end up breaking things.
Andrew Coleman thanks
Hello David, long time no talk. I'm reviewing GNS3 2.0. Just a couple of suggestions:
1.) This NAT interface overcomes my complaint that Microsoft changed the SHARING capabilities in Windows 10. As you already know (since I'm pretty sure everyone over there in Solarwinds-land has) seen the original config file I used in the default topology. Now that GNS3 2.0 has the ability to NAT through the GNS3 VM, that is a compelling reason to upgrade my GNS3.
2.) Your skills in using the original default config is good, but it's easier to setup a DHCP server on the internally facing interface of R1 so as to quickly hand out IP addresses to virtual machines handled by GNS3. This allows you to not have to setup default routes since R1 is already configured to forward out interfaces to the other side facing the internet. Which for that interface you have correctly configured.
I do like how you include the option of creating a default route. At the time I wrote the original guide, the default route was not a consideration to the point of getting devices out to the internet. Some users are security experts...not practicing network students and don't need to configure multiple routers for the labs. The inclusion of default routes is good, but I saw that as a basic CCNA thing that I did not elaborate on.
Otherwise, I think on a positive note, GNS3 2 is the new stable version and I will update my coursework with this info.
Thanks for all your hard work.
-Matt
People are telling you thank you, but I want to know how you made this work, because your configuration doesn't work.
@@josephjefferson2617 Are you replying to me or David?
@@mattreya Hi Matt, I've sorry, I don't know how this became a reply. it was not intended. This was for DAVID. I was trying to figure out if he is also a magician.
@@josephjefferson2617 thats okay. The NAT node went through changes. Originally, I wrote about it before David and recommended the loopback adapter from Microsoft. Microsoft quietly changed its function and effectively 'broke' it. The newer GNS fixed that with a nat device...but there are other things to pay attention to. Needless to say, this is a very old video and should be removed.
@@mattreya Hi again, Matt. The presentation is a more difficult one than it should have been. Router 2 should have been a PC (I used an Ubunbtu VM), rather than a router, without a static IP address. Many operating systems use DHCP as the default protocol, so why not use a DHCP configuration to assign an IP address to what should be the replacement PC. Then use the PAT configuration to close things out. THIS works. joe.
directly connected pc to my router cant connect to internet
How to connect ASA to the NAT Cloud? It works for router but not for ASA.
It works with any release of GNS3 after 2.0 (maybe even as far back as 1.5?). The issue used to be that you couldn't connect any Qemu/KVM VM to the Nat/Cloud objects without having a DynaMIPS emulated router or the generic built-in switch/hub inbetween.
So how to actualy connect ASA to the internet, do you know any video (turtorial)?
Hi Sir, can you please make topology including fortigate. thank you
Nice new feature! I'm trying to do something that's kind of the opposite - connect to device inside my virtual environment; more specifically, its web UI. Could you perhaps point me at a doc/vid that explains how to do this? The force of Google seems to have left me :)
I think I just figured it out; using a "cloud".
Glad you got it working Andre. Here is an example showing OSPF route exchange and telnet into GNS3: ua-cam.com/video/cI0z8pg-nTM/v-deo.html
Thank you David! I adapted that to sort my access issues. All sorted now.
Am I the only one who's Internet traffic is insanely slow? If I connect something directly to the NAT cloud, I can download files with around 110 KBps. If the traffic needs to traverse through several nodes, the file is downloading in around 10 KBps. That makes it practically unusable with the combination of Windows VM.
I have experienced slow throughtput if it is connected via an IOSvL2 switch. I got better performance if it is connected to the GNS3 built in switch.
Hello David, first of all, many thanks for your phenomenal work and support! I appreciate it very much.
I did that, I have put built in switch between router and NAT cloud. The topology looks like this - NAT Cloud ---> built in switch ---> ASA ---> IOS router-switch ---> Ubuntu machine. When I execute "apt-get update" on the Ubuntu node, the download speed is how I described it earlier.
Again, thanks a lot and greetings from Prague!
no funciona :(
Any ideas why when i ping google or cisco I am getting the following:
Translating "www.google.com"...domain server (192.168.122.1)
% Unrecognized host or address, or protocol not running.
I am using GNS3 v2.0 beta 4. Great video BTW!!
Rapidprogram i got it working already..it was my gns3 vm adapter settings were incorrect..i had the wrong mappings
how u config tha gns3 adapter?
"ip domain lookup" command will help
can you tell how you made it correct? i have the same problem now
Awesome!!!
Thank you!
i love u
This video was great but didn't work for me initially because I didn't have the default settings in VMWare. This other video gave me the default values, (VMware Workstation Tutorial - VMware Virtual Network Overview: ua-cam.com/video/QkKQrngBbbs/v-deo.html). After this, go to the GNS3 VM Network connections. Setup network adapter 0 (VMNet0 - Bridged) and network adapter 1 (VMNet8 - NAT). good luck.
reponse urgent
я тут был.