Endpoint Protection

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  • 1.  Another SEP issue with svchost.exe

    Posted Feb 22, 2015 01:50 AM

    To start, I've read nearly every post I can find on this issue.  I continue to get alerts for "Traffic has been blocked from this application: Host process for windows server (svchost.exe)" and I cannot figure out how to correct this issue.

    I'm a Windows 7 Pro user and an unmanaged client.  I just upgraded from SEP 11.x to SEP 12.1.5.  My problems started with me being unable to use a wireless network printer, but I was able to make a rule to allow the IP traffic from it's specific local IP - easy.    

    I continued to get alerts for svchost.exe and I noticed that my log showed that they were for UPnP discovery.  I disabled the firewall rule to block UPnP discovery as indicated in this thread: https://www-secure.symantec.com/connect/forums/svchostexe-traffic-has-been-blocked-sep-netowork-threat-protection#comment-8139281

    But I still get svchost.exe alerts...

    I've attempted to disable TCP/IPv6 as indicated in this thread: http://www.symantec.com/connect/forums/traffic-has-been-blocked-application-svchostexe-0

    I continue to get the message every couple minutes.  Judging by the log, it appears to still be an issue with IPv6.

    6684    2/21/2015 6:26:32 PM    Blocked    3    Outgoing    UDP    teredo.ipv6.microsoft.com [94.245.121.251]    40-16-7E-A1-87-90    3544    192.168.1.206    90-E6-BA-07-41-40    49794    C:\Windows\System32\svchost.exe    SYSTEM    NT AUTHORITY    Default    2    2/21/2015 6:26:04 PM    2/21/2015 6:26:20 PM    Block IPv6 over IPv4 (Teredo) Remote UDP port 3544    

    I don't want to just disable the alerts.  Can anybody offer some further advice on the subject?  

    Thanks in advance!

     



  • 2.  RE: Another SEP issue with svchost.exe
    Best Answer

    Posted Feb 23, 2015 02:49 PM

    IPv6 is being blocked, causing this alert. You can turn off IPv6 if not in use (probably not)

    http://support.microsoft.com/kb/929852



  • 3.  RE: Another SEP issue with svchost.exe

    Posted Feb 28, 2015 02:18 AM

    Embarassingly, I just needed to restart my computer after making all the changes.  All is well now.  Thx.