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Message #108777
[Bug 1500992] Re: networkd: Don't reset forwarding unless told to do so in config
This bug was fixed in the package systemd - 225-1ubuntu7
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systemd (225-1ubuntu7) wily; urgency=medium
* Don't restart logind on upgrades any more. This kills X.org (#798097)
while logind doesn't save/restore its open fds (issue #1163), and also
gets confused about being idle in between (LP: #1473800)
* debian/extra/initramfs-tools/hooks/udev: Copy all
/etc/udev/rules.d/*.rules rules which are not merely overriding the one in
/lib/, not just 70-persistent-net.rules. They might contain network names
or other bits which are relevant for the initramfs. (Closes: #795494)
* ifup@.service: Drop PartOf=network.target; we don't want to stop these
units during shutdown. Stopping networking.service already shuts down the
interfaces, but contains the safeguard for NFS or other network file
systems. Isolating emergency.target still keeps working as before as well,
as this also stops networking.service. (Closes: #761909, LP: #1492546)
* networkd: Change IPForward= default to "kernel". This keeps compatibility
with lots of packages which expect to be able to enable global forwarding
in /proc/sys/net/ipv4/ip_forward. (LP: #1500992)
-- Martin Pitt <martin.pitt@xxxxxxxxxx> Mon, 05 Oct 2015 15:53:26
+0200
** Changed in: systemd (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1500992
Title:
networkd: Don't reset forwarding unless told to do so in config
Status in systemd package in Ubuntu:
Fix Released
Bug description:
It's been reported by several LXC users that systemd-networkd will
turn off per-interface forwarding for all network interfaces when it
starts.
Presumably upstream expects users to go and manually edit their config
to allow it when needed.
This breaks LXC, libvirt, ... anything which ships a bridge that then
NAT or route outgoing traffic. Requiring the user to do the config
change would be a massive regression in user friendliness and having
lxc, libvirt, ... do it for the user would be a policy violation.
As a result, I'd recommend we patch systemd to not interfere with
forwarding unless explicitly configured by the user. This will allow
all our existing scripts to keep setting things up themselves and have
it all run fine.
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References