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merlyn (47)

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Journal of merlyn (47)

Thursday January 29, 2004
05:12 PM

openbsd's fingerprinting and shaping used for evil^Wgood

[ #17094 ]
I can't believe I didn't see this earlier. Oh, how sweet.

in /etc/pf.conf:

    altq on $ext_if cbq queue { q_default q_web q_mail }

    queue q_default cbq(default)

    ... queue q_web (not shown) ...

    ## all mail limited to 1Mb/sec
    queue q_mail bandwidth 1Mb { q_mail_windows }
    ## windows mail limited to 56Kb/sec
    queue q_mail_windows bandwidth 56Kb


    pass in quick proto tcp from any os "Windows" to $ext_if port 25 keep state queue q_mail_windows
    pass in quick proto tcp from any to $ext_if port 25 label "smtp" keep state queue q_mail

Mail coming from windows boxes (all flavors) compete for my virtual 56K line. All other mail can come in the fat pipe. Already a huge difference in my load. Bwa ha ha.

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