Ditch, Derek derek.ditch at criticalstack.com
Fri Dec 9 19:23:50 PST 2016


I haven’t used your tool before. That’s interesting…I tested in my ROCK NSM dev VM and it failed. When I switched to the El Repo kernel it had no problem. On production sensors w/ AF_PACKET I get ~ 0.06% packet loss. I’ll have to dig deeper on this. Your go app fails on my production sensor too, but I never had sufficient packet loss to dig into it.

Have you submitted an issue with Red Hat to get the fix backported? If so, can you post the bug tracker number?


On 12/9/16, 18:02, "Azoff, Justin S" <jazoff at illinois.edu> wrote:

    > On Dec 9, 2016, at 5:57 PM, Ditch, Derek <derek.ditch at criticalstack.com> wrote:
    > To be clear, AF_PACKET on RHEL7 and CentOS7 work extremely well w/ Bro 2.5 and the af_packet plugin. It will not, however, work under RHEL 6 because it uses the 2.x kernel.
    Is this with a single worker or multiple workers?
    A single worker would work fine, but as far as I can tell hash based fanout is broken.
    If bro is working for you, any ideas why https://github.com/JustinAzoff/can-i-use-afpacket-fanout/ fails to run properly on Centos 7?
    - Justin Azoff


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