kolla-ansible/releasenotes/notes/bug-1945453-c410cc090cb85feb.yaml
Radosław Piliszek 1bfed045cf Do not set net.ipv4.ip_forward sysctl
To prevent a security issue.
More details in the reno.

Change-Id: I8bb398e299aa68147004723a18d3a1ec459011e5
Closes-Bug: #1945453
2021-09-29 15:19:12 +00:00

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YAML

---
security:
- |
Fixes ``net.ipv4.ip_forward`` not to be enabled by Kolla Ansible
on the default network namespace.
It was enabled on hosts with Neutron L3 Agent (thus in most common
setups with OVS and/or Linux Bridge, but not OVN) and allowed,
unless users had extra iptables rules to avoid that, any traffic
to be accepted for forwarding (as long as it was routable and passed
other checks).
Users of existing setups are advised to re-evaluate whether they
need this sysctl enabled and disable if not necessary.
Kolla Ansible will simply no longer try to set this sysctl at all.
Neutron L3 Agent handles forwarding enablement per managed
namespace.
`LP#1945453 <https://launchpad.net/bugs/1945453>`__