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Thread: DD-WRT & rflow collector

  1. #21
    Jeff Liebermann
    Guest

    Re: DD-WRT & rflow collector

    On Tue, 27 May 2008 02:09:59 -0500, msg <msg@_cybertheque.org_> wrote:

    >Jeff Liebermann wrote:
    >
    ><snip>
    >I also have a really ancient Xenix server
    >> with a blown IBM monochrome display. When I plug in a VGA, it
    >> overlaps the memory mapped for the Digiboard serial card and panics.
    >> So, I have to fix the monitor. I hate computers...


    >Is it running on AT-class hardware or Microchannel? Can you
    >cpio the entire system (sans user data where necessary) to
    >preserve it? Is it MS-Xenix or the IBM variant?
    >Michael


    It's not fixed yet, but I've got a handle on it. However, you're
    right. I should get a backup before I do something dumb.

    It's SCO Xenix 2.3.3 (not the latest which was 2.3.4). It's running
    on a 386-20 with an IIT Co-processor, 8MBytes of RAM, and a 270MByte
    (not gigabyte) hard disk. The Archive 2150 cartridge tape drive died
    long ago (when the rubber roller turned to sticky goo). I've got
    TCP/IP running on a WD8003 ethernet card. I have two filesytems.
    /root for the OS and /u for the accounting system. I can cpio the
    whole mess fairly easily, but I sometimes get local streams buffer
    overflows. So, I just ftp the key files. I do have a full cpio
    backup, but it's fairly old. Incidentally, SCO ceased development on
    Xenix in about 1995.

    Never, in my wildest nightmares, did I ever dream I would be trying to
    find a monochrome monitor. Sigh.

    Incidentally, I "sold" (for the cost of shipping), all my MCA boards
    about 3 months ago. Two boxes with perhaps a total of 50 boards. Good
    riddance. That leaves the EISA and VL Bus cards.



    --
    Jeff Liebermann jeffl@cruzio.com
    150 Felker St #D http://www.LearnByDestroying.com
    Santa Cruz CA 95060 http://802.11junk.com
    Skype: JeffLiebermann AE6KS 831-336-2558

  2. #22
    msg
    Guest

    Re: DD-WRT & rflow collector

    Jeff Liebermann wrote:

    > On Tue, 27 May 2008 02:09:59 -0500, msg <msg@_cybertheque.org_> wrote:
    >
    >
    >>Jeff Liebermann wrote:
    >>
    >><snip>
    >>I also have a really ancient Xenix server
    >>
    >>>with a blown IBM monochrome display. When I plug in a VGA, it
    >>>overlaps the memory mapped for the Digiboard serial card and panics.
    >>>So, I have to fix the monitor. I hate computers...

    >
    >
    >>Is it running on AT-class hardware or Microchannel? Can you
    >>cpio the entire system (sans user data where necessary) to
    >>preserve it? Is it MS-Xenix or the IBM variant?
    >>Michael

    >
    >
    > It's not fixed yet, but I've got a handle on it. However, you're
    > right. I should get a backup before I do something dumb.
    >
    > It's SCO Xenix 2.3.3 (not the latest which was 2.3.4).


    Ah, not so old then; I consider anything from SCO "new".

    >
    > Never, in my wildest nightmares, did I ever dream I would be trying to
    > find a monochrome monitor. Sigh.


    Hmmm, don't we all have mono monitors stored in strange places? Too
    bad I am 1800 miles away... Anyway, long ago before mono monitors
    appeared surplus, I modified a Ball NTSC video monitor to accept
    external h&v sync and tweaked the horiz. osc. and it worked pretty well.
    >
    > Incidentally, I "sold" (for the cost of shipping), all my MCA boards
    > about 3 months ago. Two boxes with perhaps a total of 50 boards. Good
    > riddance. That leaves the EISA and VL Bus cards.


    Still depend on some high-performing EISA boards here...

    Michael

  3. #23
    seaweedsl
    Guest

    Re: DD-WRT & rflow collector

    On May 26, 2:23 pm, Jeff Liebermann <je...@cruzio.com> wrote:
    > DD-WRT v24 final release arrived last week. I've installed it on
    > several non-critical machines. It's working just fine,...


    Great news. I guess it's time to update ours.

    > While you're at it, here's another mystery. Go to "Services" tab and
    > scroll down to the very bottom of the list. There's something called
    > "WAN Traffic Counter - ttraff daemon". I enabled it and tried to
    > decode it's purpose, but failed. The source code is interesting:
    > <http://svn.dd-wrt.com:8000/dd-wrt/browser/src/router/rc/ttraff.c?rev=...>
    > and says "used for collecting and storing WAN traffic info to nvram".
    > Ok, so where do I find it and how do I use the collected data?


    I'm not even guessing. I can see some numbers moving for each user
    connected. For now, that's my info:
    Who's online, and how their numbers compare to others.

    > Well, I hate to admit a small failure, but I was sympathetic (and
    > bored) yesterday. So, I downloaded the latest MRTG and decided to
    > scribble a web page detailing what it takes to monitor a DD-WRT based
    > router.


    Fantastic ! This could really help.
    >
    > The first thing I discovered is that the MRTG Windoze install and
    > setup instructions have a few major errors. The next thing I
    > discovered is that I had no easy way to generate a dynamic list of MAC
    > addresses so that new graphs could be created on the fly. I think I
    > can do that with MACupd or more crudely with arp -a or a simple Perl
    > script. Within about an hour, I discovered that I had a major project
    > on my hands and gave up for now. I hate programming...
    >


    OK, so at least that verifies I'm not a total idiot - it is hard.

    > I tried the Windoze (demo) version of NTOP recently. It was even more
    > complicated to setup than before. I did manage to configure Netflow
    > (2055) but couldn't get NTOP to display any data. It was also
    > irritating to find that I had to configure an ethernet interface for
    > data sniffing, even though I wasn't using it.


    That was my experience. Also, it clashes with Rflow and messes it up
    as well.


    Thanks Jeff. This affirms the value of Rflow. Not only is it the
    only one that works readily, but also, if more people use it, maybe
    somebody will take the initiative and improve it.

    Steve

  4. #24
    Jeff Liebermann
    Guest

    Re: DD-WRT & rflow collector

    On Tue, 27 May 2008 09:12:53 -0700 (PDT), seaweedsl
    <seaweedsteve@gmail.com> wrote:

    >Fantastic ! This could really help.


    I'll work on it when I catch up on my backlog. That should be
    sometime between a week and perhaps a few years from now.

    >OK, so at least that verifies I'm not a total idiot - it is hard.


    SNMP is simple, not easy.
    Besides, if it were easy, it would be no fun.

    >That was my experience. Also, it clashes with Rflow and messes it up
    >as well.


    Nope. At one point, I had Wall Watcher, RFlow, and MRTG pounding on
    my DD-WRT based router. I also was using an SNMP MIB browser to pound
    on the router at the same time. I sometimes had a contention problem
    with two SNMP programs running at the same time, but no crashes.

    >Thanks Jeff. This affirms the value of Rflow. Not only is it the
    >only one that works readily, but also, if more people use it, maybe
    >somebody will take the initiative and improve it.


    I think Netflow/Rflow is closer to the goal of monitoring per user
    connections. However, I know more about MRTG and SNMP, so I'm tempted
    to work with it instead. I'll probably toss a coin.

    Incidentally, change your SNMP write "private" password to something
    obscure. It's possible to do all kinds of ugly things if I can write
    to your router. Leave the SNMP read password at "public" for now.



    --
    Jeff Liebermann jeffl@cruzio.com
    150 Felker St #D http://www.LearnByDestroying.com
    Santa Cruz CA 95060 http://802.11junk.com
    Skype: JeffLiebermann AE6KS 831-336-2558

  5. #25
    Junior Member
    Join Date
    Jun 2008
    Posts
    1
    Hi
    Good thread. I am running dd-wrt v23 (last) sp2 I think. I enabled rflow, and snmp. Two things I noticed, on my collector (adventnet)..

    http://manageengine.adventnet.com/pr.../download.html


    I saw "in" traffic but not out, although it did show my ip addresses from my inside network listed --> even when going externally, this may be simply a configurtion issue. Others?

    And what proved VERY INTERESTING ... performance. I noticed my speed from www.speakeasy.net down from my usual 2500-2600 to about half of that (1100 or so). Easily reproducable with several runs. I then took my laptop , ethernet connected it, and reran test, (the same), so not a wireless issue. I then, disabled rflow, and snmp, saved the change (no router reboot here),and reran the speed test, back to 2500-2600. The test was also run on multiple laptops (so not a download or other thing influencing), and one was osx and one windows. fact run on multi machines also dispels possibility of extra load on the pc itself. (actually vmware image was involved.)

    Left to try. disable just snmp and leave rflow running and see the speed. A very compelling effect of halving the bandwidth just by enabling rflow and snmp wouldn't you agree?

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