d90c01d02c
"Recently" (as of 5.18) the Linux kernel gained the ability of locking bridge ports to restrict network access to authenticated hosts only. This is implemented by disabling automated learning and dropping incoming traffic from unknown hosts. User space is then expected to add fdb entries for authenticated hosts. Once a fdb entry exist, traffic for that host will be forwarded as expected. This was later extended with "Mac Authentication Bypass", where the locking was extended to fdb entries. In this mode the kernel adds fdb entries again automatically, but they are locked by default. To properly configure this, add two network options and one netdev option: * `LinkLocalLearning=` to prevent the kernel from creating unlocked entries based on link-local traffic, which would bypass any authentication. Needed when enabling learning on a locked port. * `Locked=` to allow setting a bridge port to locked. * `MACAuthenticationBypass=` to allow enabling Mac Authentication Bypass on a port. Requires learning to be enabled on the port as well (and consequently `LinkLocalLearning` disabled on the bridge). An authenticator (e.g. hostapd) is still needed to do the actual authentication, the kernel only provides the access control.
System and Service Manager
Details
Most documentation is available on systemd's web site.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Code Map for information about this repository's layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list, join our IRC channel #systemd on libera.chat or Matrix channel
Stable branches with backported patches are available in the stable repo.
We have a security bug bounty program sponsored by the Sovereign Tech Fund hosted on YesWeHack
Repositories with distribution packages built from git main are available on OBS