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False Positive Gateway Anti-Virus Alert: (Cloud Id: 54877308) Agent.FL (Trojan) blocked.

From about 2 months I'm receiving this alert each time I try to publish an application through Visual Studio from LAN to DMZ.

The GAV is blocking the file 'bin/roslyn/Microsoft.CodeAnalysis.VisualBasic.dll' and does not allow to be copied in the destination directry.

I'm sure is a false positive because this file is a Microsoft Library included in teh build engine of Visual Studio.

Category: Firewall Security Services


  • Hello @Edika,

    If you believe it is a false positive, kindly follow the steps given in the following KB.

    The backend team will look into it.


    Shipra Sahu

    Technical Support Advisor, Premier Services

  • EdikaEdika Newbie ✭

    The page to submit the file does not work. When I try to submit the form I receive an 'ERR_CONNECTION_RESET'.

    It looks is not able to upload the file

  • AjishlalAjishlal Community Legend ✭✭✭✭✭

    Hi @Edika

    This could be happen if your VB version is outdated.

  • @Edika,

    You can also report this from

    There is a Report Issues section at the bottom, you can go there and attach the necessary files as mentioned in the KB.


    Shipra Sahu

    Technical Support Advisor, Premier Services

  • LarryLarry All-Knowing Sage ✭✭✭✭


    I just enabled DPI-SSL on my office TZ270W.

    I use Ninite to update third-party application software. Having done that, I can no longer update TeraCopy because I get the following error message:

    Gateway Anti-Virus Alert: MalAgent.J_100774 (Trojan) blocked. /teracopy3.17.exe

    The "Report Issues" link REQUIRES a virus sample to upload.

    Please, tell me - in all honesty - how I am supposed to upload a virus sample that the firewall has blocked from being downloaded?

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