Author Topic: Avast Firewall blocking network PCs  (Read 4630 times)

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Offline Mark657

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Avast Firewall blocking network PCs
« on: January 04, 2019, 10:09:25 PM »
Hello. I have three PCs on my home network, all running Avast Internet Security. After the Avast update today, the computers started having problems seeing each other.

When I disable the Avast Firewall portion of Avast on all three, then everything is great. Each PC can see the other two PCs.

What setting do I need to change in Avast Firewall to ensure all of my PCs resume seeing each other?

Thanks

Mark

Offline Pondus

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Re: Avast Firewall blocking network PCs
« Reply #1 on: January 04, 2019, 10:15:21 PM »
Quote
  What setting do I need to change in Avast Firewall to ensure all of my PCs resume seeing each other?
Network profile to private

https://support.avast.com/en-us/article/Antivirus-Firewall-Application-Rules



Offline Mark657

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Re: Avast Firewall blocking network PCs
« Reply #2 on: January 04, 2019, 10:32:35 PM »
Thanks. The PC that first had the problem is acting weird. That setting had indeed gotten changed to PUBLIC. But now when I try to change it to PRIVATE, the setting literally changes back to PUBLIC all by itself after about 1 second.

Any ideas why this might be happening?

Offline Pondus

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Re: Avast Firewall blocking network PCs
« Reply #3 on: January 04, 2019, 11:22:44 PM »
Tried change and reboot?


Offline Mark657

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Re: Avast Firewall blocking network PCs
« Reply #4 on: January 05, 2019, 12:42:36 AM »
I uninstalled Avast and re-installed. The same problem is happening.

As soon as I set it to PRIVATE, it rolls back to PUBLIC.

This is not happening on my other two computers.

I am running Windows 7 on all three.

Offline mchain

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Re: Avast Firewall blocking network PCs
« Reply #5 on: January 05, 2019, 07:18:19 AM »
Time to try bob3160's clean install procedure:
https://forum.avast.com/index.php?topic=224161.msg1488303#msg1488303
Tho the topic is different, the procedure is the same and the reason is the same, to fix program glitches.
Bob has also provided a link for using avastclear.exe:  https://youtu.be/p-h3myRD51A
Windows 10 Home 64-bit 20H2 Avast Premier Security version 21.3.2459 (build 21.3.6164.652) UI version 1.0.612.

Offline Mark657

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Re: Avast Firewall blocking network PCs
« Reply #6 on: January 05, 2019, 02:01:20 PM »
Thanks. I did use Revo uninstaller for just that reason but will try these options also.

Offline profdraper

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Re: Avast Firewall blocking network PCs
« Reply #7 on: September 30, 2019, 02:25:34 AM »
No, this is not fixed & would hope that Avast do something useful about this, ie:
Clean Install, latest version of Avast Premier. LAN set to Private Network.
Other Network PCs cannot be seen, files & dirs not shared etc.
Turn off Avast firewall and they can. This is consistent.

The one preference that allows (some) access is to turn ON Firewall /Internet Connection Sharing Mode. However, of course this seems to be a kludge & is not what that preference is intended for, ie: I do not want or need to share Internet connection, rather, simply share files on a Home Private LAN.

Further, if AVAST is bypassed completely, I can also see a share MacOS computers on the same network; also see and access other peripherals such as LAN router, NAS, Apple TimeCapsule etc.

Finally, while we're at it: is impossible to access TV Chromecast without turning off AVAST Firewall. In all cases as per above, the built-in Windows Security & Firewall functions perfectly.