[Bro] First time Bro Cluster Spin up

Dawson,Scottie scottie.Dawson at colostate.edu
Tue Nov 18 06:17:04 PST 2014

Thank you both John and Keith for the suggestions.  I rebooted the server for good measure and re-ran the setcap command, with the same results in broctl.

worker-21 terminated immediately after starting; check output with "diag"


Diag worker-21

==== stderr.log
fatal error: /usr/local/bro/bin/bro: problem with interface dag0:42 - pcap_open_live: dag0:42: dag_open /dev/dag0: Permission denied


Is anyone using an Endace card in there cluster?  I am starting to suspect that the permissions issue has to do with how I am configuring and launching the capture card.  I am going to reach out to their support organization and see if there is a way to launch the card as a non root user.

I am sure I can get all this working with root but I am trying to avoid that.

Thanks again


"chop wood carry water"

From: bro-bounces at bro.org [mailto:bro-bounces at bro.org] On Behalf Of Dawson,Scottie
Sent: Monday, November 17, 2014 1:05 PM
To: bro at bro-ids.org
Subject: [Bro] First time Bro Cluster Spin up


I am attempting to get a Bro cluster working and I get the following error for all my workers, (full output of diag below).   "fatal error: /usr/local/bro/bin/bro: problem with interface dag0:42 - pcap_open_live: dag0:42: dag_open /dev/dag0: Permission denied"

Thoughts on what I am missing?

I have an Endace DAG8.1SX set up to run with 22 streams.
1 Server set up to have 22 instances of BRO workers on it
1 server set up as the manager and prox
Using     libpcap-1.6.2
                bro version 2.3.1


1.       I have run the following command on both the worker and the manager/proxy servers.

sudo setcap cap_net_raw,cap_net_admin=eip /usr/local/bro/bin/bro

2.       I can launch bro manually on the worker if I use sudo

acns-bro at endace:/usr/local/bro/bin$ sudo ./bro -i dag0:42
listening on dag0:42, capture length 8192 bytes

^C1416254260.140036 received termination signal
1416254260.140036 209 packets received on interface dag0:42, 0 dropped

3.       Manipulated the user launching bro (acns-bro) group permissions to be in the adm group

BroControl] > diag worker-21

Bro 2.3.1
Linux 3.13.0-39-generic

==== No reporter.log

==== stderr.log
[dag_open] dag_clone dagfd for dagiom: Permission denied
fatal error: /usr/local/bro/bin/bro: problem with interface dag0:42 - pcap_open_live: dag0:42: dag_open /dev/dag0: Permission denied

==== stdout.log
max memory size         (kbytes, -m) unlimited
data seg size           (kbytes, -d) unlimited
virtual memory          (kbytes, -v) unlimited
core file size          (blocks, -c) unlimited

==== .cmdline
-i dag0:42 -U .status -p broctl -p broctl-live -p local -p worker-21 local.bro broctl base/frameworks/cluster local-worker.bro broctl/auto

==== .env_vars

==== .status

==== No prof.log

==== No packet_filter.log

==== No loaded_scripts.log

Scott Dawson
ACNS Network Security
Colorado State University

"chop wood carry water"

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ICSI.Berkeley.EDU/pipermail/bro/attachments/20141118/74e0f877/attachment.html 

More information about the Bro mailing list