Re: (ASCEND) Re: p75 Unwanted Dialouts

["Dr. Wolfgang Beneicke" <beneicke@mpimf-heidelberg.mpg.de>]

sorry for wasting list space for trivia like this, but maybe more users
will follow the link to connectnet to decode wdd packets.

Charles Winston <mail@winston.prestel.co.uk> wrote:

> ...
> >> http://www.connectnet.com/support/isdn/pipeline-dial.html
> >
> >Have you used this site before? I tried copying in their example and could
> >not get any results out of it.
> ...

He's right. If you paste in their example a one-liner is returned with
NULL info.
I was curious whether the example is broken or their decoder interface.
See for yourself:

WD_DIALOUT_DISP: OLD-STYLE-PADDED.
    00c07b51d5cf  MAC destination   = 00 c0 7b 51 d5 cf
    0020af1e2660  MAC source addr   = 00 20 af 1e 26 60
            0800  type/length       = 2048
ENET_II IP  (82 bytes remaining)
                  ---- IP Header ----
              45  IP Version 4, header length = 5 (20 bytes)
              00  type of service
            0060  total length    = 96
            db14  id              = 56084
            0000  fragment offset = 0
              1f  time to live    =  31
              11  protocol        = User Datagram                 
[RFC768,JBP]
            1050  checksum        = 4176
        cde61298  source address  = 205.230.18.152.
        cf6e003c  dest address    = 207.110.0.60.
                  ---- UDP Header ----
            0089  source port     = 137 nbname
            0089  dest port       = 137 nbname
            004c  length          = 76
            2387  checksum        = 9095
-------- 54 data bytes remaining

  [0000]: 01 97 40 00 00 01 00 00 00 00 00 01 20 46 43 45 ..@.........
FCE
  [0010]: 4a 45 44 45 49 45 42 46 43 45 45 43 41 43 41 43
JEDEIEBFCEECACAC
  [0020]: 41 43 41 43 41 43 41 43 41 43 41 41 44 00 00 20
ACACACACACAAD..
  [0030]: 00 01 c0 0c 00 20                               .....


maybe they should check their offer...

One more hint for Charles:
as Peter Lalor pointed out there is no _realtime_ clock on Pipelines.
However, there is a time counter that looks like a clock (e.g. in the
telnet interface). It counts the time since last reboot. So you could
stay up until Midnight and reset the Pipeline on time...:-)
Sadly enough the uptime counter is referenced often in this users' list
to boast for how many hours a particular Ascend equipment has been
running so far. It shouldn't be worth mentioning that the box is up and
running for the last year or so...

And yes if you have Windows PCs on your network they will broadcast
regularily to update their browsing lists and to detect Domain
Controllers etc. There is an effective filter for this kind of traffic
which cuts off browsing altogether though. Would it be sufficient to
tell you "please filter on ports 137, 138, 139 protocols TCP (6) and UDP
(17)"...sometime I had to filter all DNS stuff on port 53 (ouch) and to
twiddle the NT registry to lengthen the interval between broadcasts.
Full stop.



Regards,

   Wolfgang

_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-
                         B  E  N  E  I  C  K  E
                               EDV-Beratung
________________________________________________________________________
        Netzwerk-Design - 3Com Solution Partner
           ISDN Remote Access - ASCEND Vertrieb
                 ApplePoint
                    Windows NT-Netzwerke
                       Workstation Memories and Storage Solutions

Dr. Wolfgang Beneicke                              fon +49-6223-97 07 20
Fasanenstrasse 16, D-69251 Gaiberg                 fax +49-6223-97 07 21
...near world famous Heidelberg, Germany
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