OpenBSD Journal

Jacek strikes back

Contributed by jose on from the more-oreillynet-goodneess dept.

Grégoire writes: "There is a new installment of Jacek's excellent series "Securing small networks with OpenBSD". This one is titled "Changes in pf: Packet Filtering" (06/26/2003). This time we'll look at packet filtering rules, which kick in after packets have been scrubbed and (optionally) redirected to another IP address or port with NAT rules. "

Jacek's steady stream of articles is really building into quite the plethora of useful data. Keep it up!

(Comments are closed)

  1. By Anonymous Coward () on

    It's worth noting that this article refers to OpenBSD 3.2 and as such _some_ parts of the article are no longer true when using OpenBSD 3.3 or later.

    Thanks for a good article, Jacek :-)

  2. By Jacek Artymiak () on

    I will keep on writing about the packet filter for another couple of installments of this series. Then I will switch to other OpenBSD security subjects that many of you are asking me about.

    But I will not be abandoning PF and will soon be publishing a book on OpenBSD and PF .


  3. By Anonymous Coward () on

    Modulate state part of the article describes
    modulate state for incomming tcp packets.
    I wonder if it make any sense, because it make
    sense only for outgoing packets for me.

    1. By Anonymous Coward () on

      ISNs are generated by both sides , regardless of which one initiated the connection. So, if you want to modulate the sequence numbers of your machines, you need to apply "modulate state" to every connection.

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