01-29-2020
I believe these 127.0.0.1 loopbacks are not "true network connections" and so IPV6 traffic will not pass since you blocked IPV6 networking.
The title of your post is:
Quote:
Webscrab proxy creates loads of TCP6 connections despite IPV6 being down
These 127.0.0.1 internal loopbacks are not "true connections" per se.
Did you actually try to pass IPV6 traffic thought that host? If you did, I would be surprised if any IPV6 traffic would pass since you have already disabled IPV6 networking via
"sysctl -w net.ipv6.conf.all.disable_ipv6=1".
You might want to check to make sure when you installed your proxy server that it did not unintentionally enable your intended block / disabled setup.
PS: You should use CODE tags when you post and insure your posts are well formatted and easy for everyone to read.
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LEARN ABOUT DEBIAN
shorewall6-nesting
SHOREWALL6-NESTING(5) [FIXME: manual] SHOREWALL6-NESTING(5)
NAME
nesting - shorewall6 Nested Zones
SYNOPSIS
child-zone[:parent-zone[,parent-zone]...]
DESCRIPTION
In shorewall6-zones[1](5), a zone may be declared to be a sub-zone of one or more other zones using the above syntax. The child-zone may be
neither the firewall zone nor a vserver zone. The firewall zone may not appear as a parent zone, although all vserver zones are handled as
sub-zones of the firewall zone.
Where zones are nested, the CONTINUE policy in shorewall6-policy[2](5) allows hosts that are within multiple zones to be managed under the
rules of all of these zones.
EXAMPLE
/etc/shorewall6/zones:
#ZONE TYPE OPTION
fw firewall
net ipv6
sam:net ipv6
loc ipv6
/etc/shorewall6/interfaces:
#ZONE INTERFACE BROADCAST OPTIONS
- eth0 detect blacklist
loc eth1 detect
/etc/shorewall6/hosts:
#ZONE HOST(S) OPTIONS
net eth0:[::]
sam eth0:[2001:19f0:feee::dead:beef:cafe]
/etc/shorewall6/policy:
#SOURCE DEST POLICY LOG LEVEL
loc net ACCEPT
sam all CONTINUE
net all DROP info
all all REJECT info
The second entry above says that when Sam is the client, connection requests should first be processed under rules where the source zone is
sam and if there is no match then the connection request should be treated under rules where the source zone is net. It is important that
this policy be listed BEFORE the next policy (net to all). You can have this policy generated for you automatically by using the
IMPLICIT_CONTINUE option in shorewall6.conf[3](5).
Partial /etc/shorewall6/rules:
#ACTION SOURCE DEST PROTO DEST PORT(S)
...
ACCEPT sam loc:2001:19f0:feee::3 tcp ssh
ACCEPT net loc:2001:19f0:feee::5 tcp www
...
Given these two rules, Sam can connect with ssh to 2001:19f0:feee::3. Like all hosts in the net zone, Sam can connect to TCP port 80 on
2001:19f0:feee::5. The order of the rules is not significant.
FILES
/etc/shorewall6/zones
/etc/shorewall6/interfaces
/etc/shorewall6/hosts
/etc/shorewall6/policy
/etc/shorewall6/rules
SEE ALSO
shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5), shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
shorewall6-maclist(5), shoewall6-netmap(5),shorewall6-params(5), shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5),
shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5), shorewall6-secmarks(5), shorewall6-tcclasses(5),
shorewall6-tcdevices(5), shorewall6-tcrules(5), shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)
NOTES
1. shorewall6-zones
http://www.shorewall.net/manpages6/shorewall-zones.html
2. shorewall6-policy
http://www.shorewall.net/manpages6/shorewall6-policy.html
3. shorewall6.conf
http://www.shorewall.net/manpages6/shorewall6.conf.html
[FIXME: source] 06/28/2012 SHOREWALL6-NESTING(5)