No Issue...sorry...[8-)]
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How and under which circumstances does is the user agent logged in http.log ?
I´ve seen 3 different logging behaviours
Here is no user agent logged at all (even no occurrence of ua="" in the logline)
/var/log/http/2014/10/http-2014-10-05.log.gz:2014:10:05-20:08:10 asg01 httpproxy[6509]: id="0060" severity="info" sys="SecureWeb" sub="http" name="web request blocked, forbidden category detected" action="block" method="POST" srcip="192.168.20.201" dstip="" user="" ad_domain="" statuscode="403" cached="0" profile="REF_HttProContaLanclNetwo2 (MOBILE_DEVICES_NOMITM)" filteraction="REF_HttCffMobiles (MOBILES)" size="3136" request="0x1190d4f8" url="aax-us-east.amazon-adsystem.com/.../ads" exceptions="" error="" authtime="0" dnstime="0" cattime="43344" avscantime="0" fullreqtime="60158" device="0" auth="0" country="United States" overridecategory="1" reason="category" category="154,154" reputation="unverified" categoryname="Web Ads,Web Ads"
here is a user agent logged
/var/log/http/2014/10/http-2014-10-09.log.gz:2014:10:09-13:07:23 asg01 httpproxy[6533]: id="0060" severity="info" sys="SecureWeb" sub="http" name="web request blocked, forbidden category detected" action="block" method="POST" srcip="192.168.20.201" dstip="" user="" ad_domain="" statuscode="403" cached="0" profile="REF_HttProContaLanclNetwo2 (MOBILE_DEVICES_NOMITM)" filteraction="REF_HttCffMobiles (MOBILES)" size="3141" request="0xe2674800" url="aax-us-east.amazon-adsystem.com/.../JDQ39)" exceptions="" overridecategory="1" country="Netherlands" reason="category" category="154,154" reputation="unverified" categoryname="Web Ads,Web Ads"
and here is no useragent logged, but the empty ua="" appears in the log - different to first mentioned logline, where no ua="" at all occurred
/var/log/http/2014/10/http-2014-10-09.log.gz:2014:10:09-17:16:31 asg01 httpproxy[6533]: id="0060" severity="info" sys="SecureWeb" sub="http" name="web request blocked, forbidden category detected" action="block" method="CONNECT" srcip="192.168.20.203" dstip="" user="" ad_domain="" statuscode="403" cached="0" profile="REF_HttProContaLanclNetwo (MOBILE_DEVICES_MITM)" filteraction="REF_HttCffMobiles (MOBILES)" size="3131" request="0xe26ce800" url="aax-us-east.amazon-adsystem.com/" referer="" error="" authtime="0" dnstime="0" cattime="49342" avscantime="0" fullreqtime="338449" device="0" auth="0" ua="" exceptions="" overridecategory="1" country="United States" reason="category" category="154,154" reputation="unverified" categoryname="Web Ads,Web Ads"
explanation ?