Berkeley CSUA MOTD:Entry 23938
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2025/04/06 [General] UID:1000 Activity:popular
4/6     

2002/2/21-22 [Computer/HW/CPU] UID:23938 Activity:high
2/21    reposting my question.  Is it possible to filter gige traffic
        with freebsd on x86?  Can the fastest pentium out there do that?
        I'm talking about running ipfw or ACLs.  Please do not turn this
        question into a troll on linux vs freebsd.  Thanks.
        \_ Processor speed is definitely not your problem.  I think you may
           run into problems where gige would overwhelm the PCI bus.  Not
           sure though.  Do some back of the envelope calculations and see.
           \_ A 64 bit PCI bus at 66MHz should be good enough. All major
              vendors have servers and workstations that come with it.
        \_ Even if this was possible, you probably need a heck of a server
           to be able to do that. Sun support people for example recommend, as
           a rule of thumb, in order to saturate a GigE pipe, you need to have
           one fast modern CPU per GigE NIC. Plus, you need another CPU for
           just processing the rules. Your looking at a quad CPU server with a
           64bit/66MHz PCI bus.
           \- my longer answer is in th emotd archive, but it depends in
           part: are you talking about "typical traffic" or against a hostile
           attacker. a hostile attacker can kill you. "typical traffic" is
           do-able but once you are beyond the throw money at the problem
           in terms of buying cpu and memory, this is kind of a black art
           involving hacking your net dev driver and perhaps your bpf filters.
           a lot of ids systems are freebsd boxen on gige. btw, trying to do
           this on a sysV machine is probably not possible. i dont know enough
           about linux to have an opinion there. --psb
           \- ok tnx
2025/04/06 [General] UID:1000 Activity:popular
4/6     

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