Wireshark · Ethereal-users: Re: [Ethereal-users] Only capture packets to my interface

[Guy Harris <guy@xxxxxxxxxx>]

> I just download the Ethereal 0.816 and installed it to a HPUX
> workstation.  I can start the program to capture packets.  However, I
> only see the broadcast packets and packets to my workstation.  I can't
> find any packets from my workstation.

The README.hpux file that comes with the Ethereal source code describes
this as one problem that can be seen when capturing packets on HP-UX
(regardless of what program you're using, whether it's tcpdump,
Ethereal, etc.); it gives instructions, taken from some
"comp.sys.hp.hpux" postings - the patch names may not be the correct
current ones, you'd have to ask HP what the right patches are.

Here's the section from README.hpux:

5 - HP-UX patches to fix packet capture problems

Note that packet-capture programs such as Ethereal/Tethereal or tcpdump
may, on HP-UX, not be able to see packets sent from the machine on which
they're running.  Some articles on Deja.com discussing this are:

	http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266

which says:

  Newsgroups: comp.sys.hp.hpux 
  Subject:  Re: Did someone made tcpdump working on 10.20 ?
  Date: 12/08/1999
  From: Lutz Jaenicke <jaenicke@xxxxxxxxxxxxxxxxxxxxxxx>

  In article <82ks5i$5vc$1@xxxxxxxxxxxxxxx>, mtsat <mtsat@xxxxxxxxxxxxxx>
  wrote:
   >Hello,
   >
   >I downloaded and compiled tcpdump3.4 a couple of week ago. I tried to use
   >it, but I can only see incoming data, never outgoing.
   >Someone (raj) explained me that a patch was missing, and that this patch
   >must me "patched" (poked) in order to see outbound data in promiscuous mode.
   >Many things to do .... So the question is : did someone has already this
   >"ready to use" PHNE_**** patch ?
  
   Two things:
   1. You do need a late "LAN products cumulative patch" (e.g.  PHNE_18173
  for   s700/10.20).
   2. You must use
echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem
     You can insert this e.g. into /sbin/init.d/lan
  
   Best regards,
   Lutz

and

	http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=586287166

which says:

  Newsgroups: comp.sys.hp.hpux 
  Subject: Re: tcpdump only shows incoming packets
  Date: 02/15/2000
  From: Rick Jones <foo@xxxxxxx.invalid>

  Harald Skotnes <harald@xxxxxxxxx> wrote:
  > I am running HPUX 11.0 on a C200 hanging on a 100Mb switch. I have
  > compiled libpcap-0.4 an tcpdump-3.4 and it seems to work. But at a
  > closer look I only get to see the incoming packets not the
  > outgoing. I have tried tcpflow-0.12 which also uses libpcap and the
  > same thing happens.  Could someone please give me a hint on how to
  > get this right?
  
  Search/Read the archives ?-)
  
  What you are seeing is expected, un-patched, behaviour for an HP-UX
  system.  On 11.00, you need to install the latest lancommon/DLPI
  patches, and then the latest driver patch for the interface(s) in use. 
  At that point, a miracle happens and you should start seeing outbound
  traffic.

[That article also mentions the patch that appears below.]

and

	http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=586494200

which says:

  Newsgroups: comp.sys.hp.hpux
  Subject: Re: tcpdump only shows incoming packets
  Date: 02/16/2000
  From: Harald Skotnes <harald@xxxxxxxxx>

  Rick Jones wrote:
  
	...

  > What you are seeing is expected, un-patched, behaviour for an HP-UX
  > system. On 11.00, you need to install the latest lancommon/DLPI
  > patches, and then the latest driver patch for the interface(s) in
  > use. At that point, a miracle happens and you should start seeing
  > outbound traffic.
  
  Thanks a lot.  I have this problem on several machines running HPUX
  10.20 and 11.00.  The machines where patched up before y2k so did not
  know what to think.  Anyway I have now installed PHNE_19766,
  PHNE_19826, PHNE_20008, PHNE_20735 on the C200 and now I can see the
  outbound traffic too.  Thanks again.

Another posting:

	http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=457744130

indicates that you need to install the optional STREAMS product to do
captures on HP-UX 9.x:

  Newsgroups: comp.sys.hp.hpux
  Subject:  Re: tcpdump HP/UX 9.x
  Date: 03/22/1999
  From: Rick Jones <foo@xxxxxxx>

  Dave Barr (barr@xxxxxxxxxxxxxxxxxx) wrote:
  : Has anyone ported tcpdump (or something similar) to HP/UX 9.x?
  
  I'm reasonably confident that any port of tcpdump to 9.X would require
  the (then optional) STREAMS product.  This would bring DLPI, which is
  what one uses to access interfaces in promiscuous mode.
  
  I'm not sure that HP even sells the 9.X STREAMS product any longer,
  since HP-UX 9.X is off the pricelist (well, maybe 9.10 for the old 68K
  devices). 
  
  Your best bet is to be up on 10.20 or better if that is at all
  possible.  If your hardware is supported by it, I'd go with HP-UX 11. 
  If you want to see the system's own outbound traffic, you'll never get
  that functionality on 9.X, but it might happen at some point for 10.20
  and 11.X. 
  
  rick jones

(as per other messages cited here, the ability to see the system's own
outbound traffic did happen).

An additional note, from Jost Martin, for HP-UX 10.20:

	Q: How do I get ethereral on HPUX to capture the _outgoing_ packets
	   of an interface
	A: You need to get PHNE_20892,PHNE_20725 and PHCO_10947 (or
	   newer, this is as of 4.4.00) and its dependencies.  Then you can
	   enable the feature as descibed below:

	Patch Name: PHNE_20892
	Patch Description: s700 10.20 PCI 100Base-T cumulative patch
		To trace the outbound packets, please do the following
		to turn on a global promiscuous switch before running
		the promiscuous applications like snoop or tcpdump:

		adb -w /stand/vmunix /dev/mem
		lanc_outbound_promisc_flag/W 1
		(adb will echo the result showing that the flag has
		been changed)
		$quit
	(Thanks for this part to HP-support, Ratingen)

		The attached hack does this and some security-related stuff
	(thanks to hildeb@xxxxxxxxxxxxxxxxxxxxxx (Ralf Hildebrandt) who
	posted the security-part some time ago)

		 <<hack_ip_stack>> 

		(Don't switch IP-forwarding off, if you need it !)
		Install the hack as /sbin/init.d/hacl_ip_stack (adjust
	permissions !) and make a sequencing-symlink
	/sbin/rc2.d/S350hack_ip_stack pointing to this script. 
		Now all this is done on every reboot.

Here's the "hack_ip_stack" script:

-----------------------------------Cut Here-------------------------------------
#!/sbin/sh
#
# nettune:  hack kernel parms for safety

OKAY=0
ERROR=-1

# /usr/contrib/bin fuer nettune auf Pfad
PATH=/sbin:/usr/sbin:/usr/bin:/usr/contrib/bin
export PATH


##########
#  main  #
##########

case $1 in
   start_msg)
      print "Tune IP-Stack for security"
      exit $OKAY
      ;;

   stop_msg)
      print "This action is not applicable"
      exit $OKAY
      ;;

   stop)
      exit $OKAY
      ;;

   start)
      ;;  # fall through

   *)
      print "USAGE: $0 {start_msg | stop_msg | start | stop}" >&2
      exit $ERROR
      ;;
   esac

###########
#  start  #
###########

#
# tcp-Sequence-Numbers nicht mehr inkrementieren sondern random
# Syn-Flood-Protection an
# ip_forwarding aus
# Source-Routing aus
# Ausgehende Packets an ethereal/tcpdump etc.

/usr/contrib/bin/nettune -s tcp_random_seq 2 || exit $ERROR
/usr/contrib/bin/nettune -s hp_syn_protect 1 || exit $ERROR
/usr/contrib/bin/nettune -s ip_forwarding 0 || exit $ERROR
echo 'ip_block_source_routed/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem || exit $ERROR
echo 'lanc_outbound_promisc_flag/W 1' | adb -w /stand/vmunix /dev/mem  || exit $ERROR

exit $OKAY
-----------------------------------Cut Here-------------------------------------