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Business Products => Avast Business => Topic started by: crobertson on February 02, 2017, 05:43:23 PM

Title: Avast blocking network printing
Post by: crobertson on February 02, 2017, 05:43:23 PM
Using endpoint protection, Avast is blocking our network printer. It shows as "offline" We can turn off the Avast and in a few seconds it shows back up online. It also blocks  our main application. I've put the path in both the firewall settings and exclusions, but no success.
Title: Re: Avast blocking network printing
Post by: .: Mac :. on February 13, 2017, 12:46:50 PM
If you disable just the avast Firewall shield does it allow your application and printer?

From the client please post a screenshot of the firewall rules you have and we can assist in getting them adjusted to allow this.

Cheers,
Mac
Title: Re: Avast blocking network printing
Post by: Alex_79 on April 13, 2017, 09:38:36 PM
Hello,

Another one here. I updated my virusscanner and now the firewall does his utmost to stop me from using a network printer:

Step1: I turned off my wirewall to be sure for ten minutes, suddenly printing worked again. Firewall is set to private (screenshot Firewall 1)
Step2: To try to get printing to work WITH a functioning Firewall, I went in settings (this is a Dutch language Avast version BTW), clicked on Internet Connection Sharing
thanks to a tip on this forum (screenshot firewall 2: ICS translates to "Modus internet verbinding delen". It seemed to work

Step 3: Alas, it only SEEMED to work, as now the Firewall is AGAIN blocking my printing. When I look in trusted adresses (vertrouwde adressen there is a range of 192.168.1 adresses that SHOULD allow me to print (see screenshot firewall3) because my printer has an adress in that range. But still i get blocked


Step4(?) Almost at my wits end, but I think I stumbled on something. Remember screenshot Firewall2? First I ticked the last box in the row (allow connections with friends or vertrouwde adressen)
after that I clicked on System rules (or systeem regels) and clicked the first box about allowing remote printing (see firewall4)

It ALMOST looked like I had it. But no, printer stopped halfway through, went through the same DAMN routine again of NOT printing anything. I give up, gonna buy a 2 euro printer cable, because after five years of working like a charm, network printing seems to have become unavailable  :-\ Unless someone here can mention something I have forgotten?
Title: Re: Avast blocking network printing
Post by: Pondus on April 13, 2017, 09:45:49 PM
This has worked on home versions, don't know about endpoints


try turn off port scan

Avast UI -> Protection -> Firewall -> Settings -> Advanced -> Uncheck "Enable automatic port scan detection"

Did that work?


Title: Re: Avast blocking network printing
Post by: Alex_79 on April 13, 2017, 10:06:00 PM
Ahaaaa!

For now, it did work, so quickly print everything on the backlog (dunno if it still works tomorrow)
Title: Re: Avast blocking network printing
Post by: .: Mac :. on April 22, 2017, 08:06:42 PM
I believe this is in the works to be fixed permanently