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INFO: "Redirector.GVT1.com" access by svchost.

INFO: "Redirector.GVT1.com" access by svchost.

Postby PietO » Mon Jan 09, 2017 8:19 pm

Dear W8FC users:

in the latest WFC-release 8, strict rules are predefined for svchost (with/without update) for access to Microsoft update/download servers using TCP port 80/443. Release 7 had fully open access to the world for port 80,443.

However, due to this wonderful change, you may see in rare cases access to non-microsoft servers typically Google owned e.g. "Redirector.GVT1.com". It's not trivial to find why (looks like a virus) thus here some info for you:

If a Chrome browser or derivate like Iron or Slimjet is fresh installed, it may start secretly, unrequested downloads of predefined extensions (e.g. PDF). The requests are implemented as jobs for the BITS-service (Background Intelligent Transfer) which is finally executed by a svchost process. As the traffic is standard blocked by the predefined zones, BITS is trying, retrying endlessly to get the transfer job done. Even cancelling the jobs (BITSadmin /reset in Win7) does not help as they are recreated by next invocation of Chrome browsers.

Resolve: apply ENABLE ALL to svchost temporary (i did) and after some time apply the original zone again, or define additional strict or global rules if it happens often.

(maybe other programs are using BITS in the same way)
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Re: INFO: "Redirector.GVT1.com" access by svchost.

Postby VistaFirewallControl » Tue Jan 10, 2017 11:09 am

Thank you for the information.
It's really curious.
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