This bug was fixed in the package livecd-rootfs - 2.721
---------------
livecd-rootfs (2.721) impish; urgency=medium
[ Dimitri John Ledkov ]
* 999-cpc-fixes: enable more code on grub2 armhf & arm64 (LP: #1925780)
* Add support for generic preinstalled images. LP: #1923832
* Change iptables calls, to query rules and quickly check that
connectivity works after transparent proxy has been installed. LP:
#1917920
* magic-proxy: replace http.client with urllib calls
* buildd: Re-enable merged /usr by default, as it is now required
[ Michael Hudson-Doyle ]
* remove the workaround for bug #1893818
[ Łukasz 'sil2100' Zemczak ]
* Start using the ubuntu-server-raspi seeds for preinstalled raspi server
images, similarly to how it's done for desktop-preinstalled images.
* Drop the unused imx6 support.
-- Dimitri John Ledkov <x...@ubuntu.com> Wed, 05 May 2021 19:08:21
+0100
** Changed in: livecd-rootfs (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1917920
Title:
magic-proxy broke with iptables 1.8.7-1ubuntu2
Status in launchpad-buildd:
New
Status in iptables package in Ubuntu:
New
Status in livecd-rootfs package in Ubuntu:
Fix Released
Status in lxd package in Ubuntu:
New
Bug description:
when iptables got upgraded from 1.8.5-3ubuntu4 to 1.8.7-1ubuntu2 magic
proxy stopped working in livecd-rootfs.
It does very simple thing:
iptables -t nat -A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner
daemon -j REDIRECT --to 8080
inside hirsute lxd container, with quite high privileges, in a bionic
VM, running 4.15 kernel.
With 1.8.5 above worked fine, with 1.8.7 somehow there was no outbound
connectivity the very first http networking command after the above
call would just hang indefinitely.
However, if one does this instead:
iptables -vv -t nat -S
iptables-legacy -vv -t nat -S
iptables -vv -t nat -A OUTPUT -p tcp --dport 80 -m owner ! --uid-owner daemon
-j REDIRECT --to 8080
somehow magically everything starts to work fine.
weird.
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