This plugin provides native Endace DAG card and EndaceProbe Application Dock packet capture support for Zeek.
Ensure you have a recent Zeek release installed. Bro 2.6 to Zeek 4.0 have been tested. To install zeek-dag you will need to have the
zeek-core-dev` package installed, or the compiled source directory for Zeek available.
If you are using Bro, replace commands, directories and groups prefixed with
bro` in the following instructions.
Install the latest DAG software package. Follow the DAG installation instructions to get its kernel module, drivers, userspace libraries and development headers installed.
If your installation of Zeek runs as a non-root user, add the
user to the
dag` group to allow access to DAG cards (DAG 5.7.1 or newer):
usermod -a -G dag zeek
Install prerequisites for building zeek-dag:
- Red Hat/CentOS/Fedora:
yum install cmake make gcc-c++
apt-get install build-essential cmake
- Red Hat/CentOS/Fedora:
If you are using Zeek 3.1 or later with Red Hat/CentOS 7, you will need a newer version of the GCC compiler from the
package as well as the newer
yum install epel-release yum install centos-release-scl
yum install devtoolset-7-toolchain cmake3
Enter the devtoolset environment before installing zeek-dag. Subsequent build commands will use GCC 7. You will need to enter this environment even if you are installing zeek-dag using the zkg package manager.
scl enable devtoolset-7 bash
Installation using zkg/bro-pkg package manager
Ensure you have zkg installed and configured.
If you have previously installed zeek-dag under the name
need to remove it first using
zkg remove bro-dag`.
Install zeek-dag using zkg:
zkg install endace/zeek-dag
To uninstall use:
zkg remove zeek-dag
After building Zeek from the sources, run:
git clone https://github.com/endace/zeek-dag.git cd zeek-dag ./configure --zeek-dist=<path to zeek sources> make && sudo make install
If you encounter build errors, run
`make distclean` and ensure you have an
appropriate build environment before running configure and make again.
To uninstall use:
Check the zeek-dag packet source can be loaded successfully. If everything built and installed correctly, you should see this:
$ zeek -N Endace::DAG Endace::DAG - Packet acquisition via Endace DAG capture cards (dynamic, version 0.4)
Once installed, you can use DAG card streams by prefixing them with
on the command line. Note that Zeek will write output files to the current
directory by default.
For example, to capture from DAG card 0:
zeek -i endace::dag0
To capture from DAG card 1, stream 2:
zeek -i endace::dag1:2
Note: This plugin does not configure hardware load balancing on the DAG card. Use the DAG software tools to configure the card before use.
For example to configure 2-tuple (src/dst IP) load balancing for 8 worker processes on physical DAG card dag1:
dagconfig -d1 hash_tuple=2 hash_bins=8
For information on configuring hash load balancing to multiple vDAGs in EndaceProbe Application Dock, please refer to the EndaceProbe User Guide.
To use zeek-dag in production with multiple Zeek processes, use a worker configuration similar to this in node.cfg (e.g. /opt/zeek/etc/node.cfg):
[worker-1] type=worker host=localhost lb_method=custom lb_procs=8 dag_lb_method=stream interface=endace::dag0 ## Optionally pin worker threads #pin_cpus=0,1,2,3,4,5,6,7
`lb_procs` is the number of processes for load balancing. DAG cards
support up to 32 streams/procs for load balancing in hardware, as well as
hardware packet filtering and flexible steering of up to 4 capture
ports/interfaces to streams
(see DAG documentation).
node.cfg option can be used to specify the DAG load
balancing method. This is set to
stream` by default if not specified, and
needs to be set for each worker section. Load balancing stream numbering is
reset between worker sections unless they have identical interface configuration
and the same host.
`stream` (default): Load balance receive (even numbered) streams on a single DAG card. The load balancing will start at 0 or the specified stream number.
`card`: Load balance multiple DAG cards, each with a single stream. This configuration is commonly used for vDAGs inside Application Dock. The load balancing will start at the specified DAG card number, capturing on stream 0 or the specified stream on each DAG card.
Load Balancing by Card
To use multiple DAG cards each with one stream, as commonly used for vDAGs
inside Application Dock, use
`dag_lb_method=card`. For example, to load
balance across 8 DAGs dag0-dag7 use:
[worker-1] type=worker host=localhost lb_method=custom lb_procs=8 dag_lb_method=card interface=endace::dag0 ## Optionally pin worker threads #pin_cpus=0,1,2,3,4,5,6,7
Now start the ZeekControl shell:
And start the Zeek instances:
[ZeekControl] > deploy
Basic binary-only packages can be generated as follows if you have rpmbuild and/or Debian build tools installed. Distributing these packages outside a closed environment is not recommended, as Zeek package installation locations vary.
./configure --zeek-dist=<path to zeek sources after building> cd build/ make package
Packages add the zeek user to the dag group if it exists.
If Zeek packages are installed as
add the configure option
From a completely clean (i.e. no untracked files) git checkout:
./configure --zeek-dist=<path to zeek sources> cd build/ make package_sources