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Webfiltering IPV6 Leakage when only enabled for IPV4

UTM: 9.707-5 - home license
IPV6 type - Native using PD, LAN clients via SLAAC

Goal: To allow ipv6 port 80/443 traffic to very specific end points

Issue: Several ipv6 test sites report wan ipv6 address even though only ipv4 is allowed through web proxy

Interfaces:

WAN:


Lan:


Note: ISP (att) provides /60 prefix via PD. For reasons outside the scope of this posting, wan ipv6 needs to be statically set, and is set to the first (w:x:y:0000::1) available /64 subnet. Lan is set to the next available subnet (w:x:y:0001::1) /64 subnet.

Web Proxy configure for ipv4 only

By all accounts, webfiltering should only proxy ipv4 traffic? However this is not the case, the following two sites indicate the wan ipv6 address.

http://testmyipv6.com/
http://www.traceroute6.net/

Even more bizarre, this behavior is present when the client (win10) has ipv6 disabled entirely.

Web proxy log indicates a translation to those two

2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdc576000" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="315" aptptime="88" cattime="79" avscantime="0" fullreqtime="355569" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="343" aptptime="99" cattime="89" avscantime="0" fullreqtime="991124" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services" country="United States"
2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb6ec300" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="317" aptptime="96" cattime="55" avscantime="8950" fullreqtime="506739" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdba91c00" url="http://www.traceroute6.net/" referer="" error="" authtime="0" dnstime="296" aptptime="75" cattime="71" avscantime="0" fullreqtime="298366" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdbf25800" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="368" aptptime="79" cattime="84" avscantime="0" fullreqtime="290960" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:29 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="0" aptptime="96" cattime="78" avscantime="0" fullreqtime="785671" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services"
2022:04:19-13:35:30 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="7837" request="0xdb6ea700" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="388" aptptime="53" cattime="49" avscantime="8834" fullreqtime="520356" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:30 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xda3a0300" url="http://www.traceroute6.net/" referer="" error="" authtime="0" dnstime="411" aptptime="128" cattime="135" avscantime="0" fullreqtime="300897" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:30 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb9fd500" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="308" aptptime="114" cattime="157" avscantime="0" fullreqtime="326551" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:30 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="370" aptptime="109" cattime="81" avscantime="0" fullreqtime="1033586" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services" country="United States"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb6b1100" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="346" aptptime="106" cattime="81" avscantime="9211" fullreqtime="479919" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdba93800" url="http://www.traceroute6.net/" referer="" error="" authtime="0" dnstime="342" aptptime="106" cattime="94" avscantime="0" fullreqtime="298549" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdaa54300" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="379" aptptime="105" cattime="91" avscantime="0" fullreqtime="302375" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="0" aptptime="110" cattime="95" avscantime="0" fullreqtime="761652" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="7837" request="0xdb111c00" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="385" aptptime="123" cattime="131" avscantime="8799" fullreqtime="482203" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:31 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2606:4100:3880:1234::78" user="" group="" ad_domain="" statuscode="301" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xda47ae00" url="http://www.ipv6forum.com/ipv6_enabled/sa/SA.php?id=2272" referer="http://www.traceroute6.net/cgi-bin/clg3.cgi" error="" authtime="0" dnstime="354" aptptime="83" cattime="78" avscantime="1546" fullreqtime="59201" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="165" reputation="neutral" categoryname="Technical/Business Forums" country="United States" content-type="text/html" sandbox="-"
2022:04:19-13:35:32 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="CONNECT" srcip="A.B.C.100" dstip="132.177.123.78" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="1767" request="0x9566300" url="https://www.ipv6forum.com/" referer="" error="" authtime="0" dnstime="0" aptptime="60" cattime="65" avscantime="0" fullreqtime="5091843" device="0" auth="0" ua="" exceptions="ssl,certcheck,certdate,patience" category="165" reputation="neutral" categoryname="Technical/Business Forums" country="United States"
2022:04:19-13:35:32 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdba92a00" url="http://www.traceroute6.net/" referer="" error="" authtime="0" dnstime="247" aptptime="59" cattime="58" avscantime="0" fullreqtime="319062" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:32 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdbcc5c00" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="338" aptptime="90" cattime="70" avscantime="0" fullreqtime="298348" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:32 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="399" aptptime="143" cattime="92" avscantime="0" fullreqtime="1029285" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services" country="United States"
2022:04:19-13:35:32 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdaa82a00" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="326" aptptime="108" cattime="91" avscantime="8883" fullreqtime="502348" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xda85f800" url="http://www.traceroute6.net/" referer="" error="" authtime="0" dnstime="334" aptptime="88" cattime="80" avscantime="0" fullreqtime="338216" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb9fe300" url="http://www.traceroute6.net/top.html" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="384" aptptime="124" cattime="127" avscantime="0" fullreqtime="326560" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="128.30.52.100" user="" group="" ad_domain="" statuscode="304" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xdb002000" url="http://www.w3.org/Icons/valid-xhtml10" referer="http://www.traceroute6.net/top.html" error="" authtime="0" dnstime="337" aptptime="115" cattime="114" avscantime="0" fullreqtime="911589" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="trusted" categoryname="Internet Services" country="United States"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2001:2e8:665:0:2:1:0:2d" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="7837" request="0xdb9ff100" url="http://www.traceroute6.net/cgi-bin/clg3.cgi" referer="http://www.traceroute6.net/" error="" authtime="0" dnstime="347" aptptime="132" cattime="75" avscantime="8803" fullreqtime="483590" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="178" reputation="neutral" categoryname="Internet Services" country="Japan" content-type="text/html" sandbox="-"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="A.B.C.100" dstip="2606:4100:3880:1234::78" user="" group="" ad_domain="" statuscode="301" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="264" request="0xdbea3500" url="http://www.ipv6forum.com/ipv6_enabled/sa/SA.php?id=2272" referer="http://www.traceroute6.net/cgi-bin/clg3.cgi" error="" authtime="0" dnstime="351" aptptime="109" cattime="88" avscantime="1276" fullreqtime="58706" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="165" reputation="neutral" categoryname="Technical/Business Forums" country="United States" content-type="text/html" sandbox="-"
2022:04:19-13:35:33 utm httpproxy[15066]: id="0067" severity="info" sys="SecureWeb" sub="http" name="web request blocked, connection to forbidden country" action="block" method="GET" srcip="A.B.C.100" dstip="2401:df40:1::33:582b:1886" user="" group="" ad_domain="" statuscode="403" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="3331" request="0xdb530e00" url="http://www.ipv6enabled.org/ipv6_enabled/sa/SA.php?id=2272" referer="http://www.traceroute6.net/cgi-bin/clg3.cgi" error="" authtime="0" dnstime="1" aptptime="79" cattime="101" avscantime="0" fullreqtime="588" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0" exceptions="ssl,certcheck,certdate,patience" category="111" reputation="neutral" categoryname="Education/Reference" country="Hong Kong"

In a different thread from a few years ago - 

It was mentioned this is by design. 

There is no ipv6 masq enabled, only for ipv4. No ipv6 tunnels

The IPv6 tab looks like this

Native over External (WAN): W:X:Y:0000::1
Subnet: W:X:Y:0000/64
Delegated Prefix: W:X:Y:0000::/60

When the web proxy is disabled or the internal_port2_ipv4 removed from its Allowed Networks, those two sites only report my WAN ipv4 address as expected.

Thank you for reading this long post, hopefully all pertinent information has been included.

Thoughts/suggestions?



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