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Mohaliden KadalimMohaliden Kadalim 

GNS3 seems blocking by AVG.

Dear AVG Team,

Can someone help me why GNS3 is not working. I'm sharing the error message on below.
"Error while getting VMs. Cannot connect to local server http://127.0.0.1:3080.
Please check if GNS3 is allowed in you antivirus and firewall."

Thank you and appreciate your prompt response.
Best Answer chosen by Mohaliden Kadalim
AvinashAvinash (Avast) 
Mohaliden, thank you for confirming that the issue has been resolved after disabling AVG protection.

Open AVG Internet Security->Menu->Settings->Components->Firewall->Customize->Network Profile and change it to Private.
Open AVG Internet Security->Menu->Settings->Components->Firewall->Customize->Policies->System Rules and set all rules to "Enabled".

Make sure the above settings are applied and let us know if the issue persists.

All Answers

Vishnu VardanVishnu Vardan (Avast)
Hi Mohaliden,

We will certainly check this for you.

Are you getting this error message after installing AVG program or after updating your windows?

Please let us know since when you are experiencing this issue to check from our end.

What happens when you turn off AVG protection? Is GNS3 working after disabling AVG protection?

Please follow the below steps to temporarily disable AVG protection:

1. Right-click the AVG icon in the system tray next to the clock.
2. Move the slider to temporarily disable AVG.
Mohaliden KadalimMohaliden Kadalim
Hi AVG Team,

After i temporarily disabled the AVG. My GNS3 application is working now. The error message is gone now. Can you support on how to solve the GNS3 without temporarily disabling the AVG.

Thank you,
Mohaliden
AvinashAvinash (Avast) 
Mohaliden, thank you for confirming that the issue has been resolved after disabling AVG protection.

Open AVG Internet Security->Menu->Settings->Components->Firewall->Customize->Network Profile and change it to Private.
Open AVG Internet Security->Menu->Settings->Components->Firewall->Customize->Policies->System Rules and set all rules to "Enabled".

Make sure the above settings are applied and let us know if the issue persists.
This was selected as the best answer
Mohaliden KadalimMohaliden Kadalim
Dear AVG Team,

Thank you for sharing guidelines. I can now able to open my GNS3 without any issues so far.

Mohaliden
Vishnu VardanVishnu Vardan (Avast)
That's great to hear!

Please feel free to contact us anytime in future.
Travis JTravis J
@Avinash - The solution you provided is great. There's an alternate solution to this as well when your network profile is set to Public.
AVG Internet Security > General > Exceptions:
-- Add Npcap and GNS3 folders
Note: Automatic AVG automatic scanning and shield protection will be excluded; however, a manual scan will scan the folders if necessary.
Santhosh PannerselvamSanthosh Pannerselvam (Avast)
Travis, thank you for sharing your solution. We appreciate your efforts.
Sagiv OronSagiv Oron
1
Sagiv OronSagiv Oron
if i use the free version of AVG can i still do this solution? 
because as of right now i am trying to follow the steps but they dont seem to exist in my free versionscreenshot
as you can see i can go till the "Components" part but that is it 

"Open AVG Internet Security->Menu->Settings->Components->Firewall->Customize->Network Profile and change it to Private."
Priyanga SekarPriyanga Sekar (Avast)
Hi Sagiv, 

AVG AntiVirus Free will give the basic protection which prevents viruses, spyware, and other malicious threats from infecting your PC. 

To avail the advanced features and complete protection(including firewall component), we recommend you to upgrade to a paid version. 

Below is the link to contact our Sales and billing team to get discount offers: 

https://support.avg.com/support_sales_chat?l=en

Thank you. 
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