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updates-proxy: explicitly block connection looping back to the proxy IP

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Explicitly block something like "curl http://10.137.255.254:8082" and
return error page in this case. This error page is used in Whonix to
detect if the proxy is torrified. If not blocked, it may happen that
empty response is returned instead of error. See linked ticket for
details.

Fixes QubesOS/qubes-issues#1482
This commit is contained in:
Marek Marczykowski-Górecki 2015-12-04 14:57:07 +01:00
parent 5aa0f32c78
commit 181c15f422
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GPG Key ID: 063938BA42CFA724
4 changed files with 8 additions and 0 deletions
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1
Makefile
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@ -185,6 +185,7 @@ install-common:
install network/{qubes-nmhook,30-qubes-external-ip} $(DESTDIR)/etc/NetworkManager/dispatcher.d/
install -D network/vif-route-qubes $(DESTDIR)/etc/xen/scripts/vif-route-qubes
install -m 0644 -D network/tinyproxy-updates.conf $(DESTDIR)/etc/tinyproxy/tinyproxy-updates.conf
install -m 0644 -D network/updates-blacklist $(DESTDIR)/etc/tinyproxy/updates-blacklist
install -m 0755 -D network/iptables-updates-proxy $(DESTDIR)$(LIBDIR)/qubes/iptables-updates-proxy
install -d $(DESTDIR)/etc/xdg/autostart
install -m 0755 network/show-hide-nm-applet.sh $(DESTDIR)$(LIBDIR)/qubes/show-hide-nm-applet.sh

5
network/tinyproxy-updates.conf
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@ -22,3 +22,8 @@ Allow 10.137.0.0/16
ConnectPort 443
# Explicitly block connections to the proxy IP, to return an error in such
# case. This error page contains a magic string which is used in Whonix to
# detect whether proxy is torified or not.
# See https://github.com/qubesos/qubes-issues/issues/1482 for details
Filter "/etc/tinyproxy/updates-blacklist"

1
network/updates-blacklist Normal file
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@ -0,0 +1 @@
10.137.255.254

1
rpm_spec/core-vm.spec
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@ -331,6 +331,7 @@ rm -f %{name}-%{version}
%config(noreplace) /etc/qubes/iptables.rules
%config(noreplace) /etc/qubes/ip6tables.rules
%config(noreplace) /etc/tinyproxy/tinyproxy-updates.conf
%config(noreplace) /etc/tinyproxy/updates-blacklist
%config(noreplace) /etc/udev/rules.d/50-qubes-misc.rules
%config(noreplace) /etc/udev/rules.d/99-qubes-network.rules
/etc/xdg/autostart/00-qubes-show-hide-nm-applet.desktop