WIndows 2016 outbound traffic blocked

Avery Becket 1 Reputation point
2021-09-15T21:32:39.55+00:00

We are having our 3rd party off-site backup connection blocked as well as any traffic in Firefox. Tried pinging http: & https: domains, but those get "could not find host" if I included the http/s: in the name. ping icann.org, no problem. Ping by IP. No problem. Use anything but IE with an external IP, nothing. Not even a server not found message.

I flushed DNS but can't yet do a server restart, Turned off AV. Not excited about shutting off Windows Firewall during production hours, nor can I restart until my maintenance window late at night.

Any ideas?

VM running Win 2016 Standard, fully updated.

Using 3rd party AV & Windows Server Essentials

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Windows Network
Windows Network
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.Network: A group of devices that communicate either wirelessly or via a physical connection.
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  1. Dave Patrick 426.1K Reputation points MVP
    2021-09-15T21:40:14.057+00:00

    We are having our 3rd party off-site backup connection blocked as well as any traffic in Firefox.

    Not clear what you have going here but the 3rd party service provider will be your best resource to troubleshoot.

    --please don't forget to upvote and Accept as answer if the reply is helpful--

  2. Limitless Technology 39,396 Reputation points
    2021-09-16T12:48:27.973+00:00

    Hello @Avery Becket

    Besides recommending getting in touch with your Backup solution manufacturer for more details about the application and transport, if you know the ports used you can check for filtering with the PortQry Scanner tool from Microsoft:

    https://www.microsoft.com/en-us/download/details.aspx?id=17148

    Hope this helps identifying the issue,
    Best regards,

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