Topic Thread

Hi all. For two weeks have been picking up false positives on windows updates, Cant whitelist certain IPs with the virus feature on the firewall policy, any ideas on how to mitigate?

Message meets Alert condition
Virus/Worm detected: Protocol: "HTTP" Source IP: 192.168.xxx.xxx
Destination IP: 8.247.248.249 Email Address From: Email Address
To: VIRUS REFERENCE URL:
date=2018-06-18 time=08:59:22 devname=xxxxxx devid=FG100E4Q17006469 logid="0211008192" type="utm" subtype="virus" eventtype="infected" level="warning" vd="root" eventtime=1529305162 msg="File is infected." action="blocked" service="HTTP" sessionid=72527335 srcip=192.168.xxx.xxx dstip=8.247.248.249 srcport=54879 dstport=80 srcintf="port1" srcintfrole="lan" dstintf="WAN LINK OUT" dstintfrole="wan" policyid=29 proto=6 direction="incoming" filename="26773177_129255bcafdf28ba563f60069f60029783bd29f9.cab" quarskip="File-was-not-quarantined." url="http://download.windowsupdate.com/d/msdownload/update/others/2018/06/26773177_129255bcafdf28ba563f60069f60029783bd29f9.cab" profile="default" agent="Windows-Update-Agent/10.0.10011.16384" analyticscksum="b335f5cacec2a70f99aff42470beeb60ee60bad85686640ed04529a60244b0ef" analyticssubmit="true" crscore=50 crlevel="critical"

Hi,

You can configure a firewall policy to allow access to windows update servers and move the policy to the top of the policy list.

You need to create FQDN address object for the following FQDN's.

download.microsoft.com
windowsupdate.com
windowsupdate.microsoft.com
download.windowsupdate.com
update.microsoft.com

Configure firewall policy without authentication

From interface Internal to destination Interface External but limit the destination address to a group containing Microsoft update FQDN's

And move the policy to top of the policy table.

Regards,

Deepak Kumar

NSE4