![]() ![]() There is no ill intention on breaking a certain setup (and none was implied here but I feel I should state it explicitly). The rework of code paths is always done to simplify and to take side effects out of the configuration paths as they are reported. That's also why we involved Klara to look at a few shortcomings and problems encountered over the years.Ģ. It's being worked on but the main consumers seem to be OPNsense/pfSense and research projects (where this originally came from). Netmap has its limits both in technical and organisational sense. FreeBSD state does sometimes deteriorate due to surrounding networking changes. It should be noted that this config did previously work (with the OPNs bridge or without), so not sure where a change was implemented to break it.Īm I on the right path here? Apologies if I am off target, I am a bit out of my comfort zone on this one.Ĭould be that it was working either due to older FreeBSD state or old code paths that have subsequently been rewritten. Therefore, the solution is to either fix netmap or add support to if_bridge(4). IF I understand correctly (big assumption), their "bridge mode" currently uses netmap and bypasses the OS, but the problem is that ZA won't pass traffic at all unless the bridge is also configured in OPNs (resulting in the flapping). It doesn't stall, it just doesn't work at all which seems different. I have a feeling this doesn't apply to me due to the fact that I have OPNs configured as a transparent filtering bridge and using the ZA bridge deployment mode. The result is that it "works", but I still have the interface flapping so it didn't resolve my particular issue. Sunny Valley support has indicated the problem is netmap and asked me to give this a try, which I did yesterday. I have been troubleshooting an issue with Sensei/ZA which I have documented here: Not quite sure if this applies to my situation - looking for clarification. The patch does have implications on reliability in generic mode (which was always and will always be less reliable than native netmap mode), but we will explain these at a later time. We would hope some of you could try this one out and see if problems disappear (or perhaps cause another dropout as we've solved internally already with an earlier version of the patch). If you see log messages here then you might be affected and perhaps saw the behaviour before: suricata/zenarmor needs to be restarted in order to continue packet flow.Īnd the kernel can be installed on 23.1 easily: It's easy to spot these on your system, e.g.:Ĥ42.167865 generic_netmap_register Emulated adapter for gif1 activated One of those bugs has been network traffic becoming unresponsive on generic mode, which means the driver itself doesn't support netmap, but can be made to interact with netmap wrapping around it. One of the goals in the project was to find and remove bugs from netmap. Zenarmor (Sensei) uses the netmap framework to access raw Ethernet frames.Zenarmor and OPNsense have been working with Klara to bring netmap improvements to FreeBSD, some of which have already landed in the development branch for upcoming FreeBSD 14. To enjoy all of the filtering functionalities of the Zenarmor, you must have the netmap framework installed on your system. Latest FreeBSD-based systems come with already installed netmap for you and are ready to be installed the Zenarmor. However, on Linux, netmap is not included by default. If you are using a Linux-based firewall such as iptables, ipfw, firewalld, etc., you should set up netmap on your Linux system to get the benefit of all Zenarmor capabilities or even Suricata. Installing netmap to Linux operating systems may a little tricky. using/loading netmap kernel modules on your Linux map installation instructions on Linux operating systems(Ubuntu, Debian, CentOS etc.).netmap supported drivers/hardware requirements for netmap on Linux.You find information about the following topics in this netmap quick start guide: Therefore, we provide you the netmap installation steps in this netmap starting tutorial. ![]() Netmap is a DPDK-like kernel interface that Zenarmor uses to deploy between your Ethernet Adapter and Linux/BSD Networking Stack. This allows us to have a peek at packets and take actions before they even reach their destinations. Netmap provides extremely fast and efficient packet I/O in kernel, userspace, and virtual machine platforms. It is capable of handling tens of millions of packets per second, matching the speed of 10G and 40G ports even with small frames. Netmap is compatible with FreeBSD, Linux, and some versions of Windows. For FreeBSD and Linux, it is implemented as a single kernel module. Netmap is already included and enabled by default in recent FreeBSD (>= 10.x), OPNsense(r) and pfSense® software software releases. ![]()
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