WebSVN – nexmon – Blame – Rev 1 – /utilities/libpcap/README.hpux

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office

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For HP-UX 11i (11.11) and later, there are no known issues with

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promiscuous mode under HP-UX. If you are using a earlier version of

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HP-UX and cannot upgrade, please continue reading.

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HP-UX patches to fix packet capture problems

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Note that packet-capture programs such as tcpdump may, on HP-UX, not be

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able to see packets sent from the machine on which they're running.

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Some articles on groups.google.com discussing this are:

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http://groups.google.com/groups?selm=82ld3v%2480i%241%40mamenchi.zrz.TU-Berlin.DE

which says:

Newsgroups: comp.sys.hp.hpux

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Subject: Re: Did someone made tcpdump working on 10.20 ?

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Date: 12/08/1999

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From: Lutz Jaenicke <jaenicke@emserv1.ee.TU-Berlin.DE>

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In article <82ks5i$5vc$1@news1.dti.ne.jp>, mtsat <mtsat@iris.dti.ne.jp>

wrote:

>Hello,

>

>I downloaded and compiled tcpdump3.4 a couple of week ago. I tried to use

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>it, but I can only see incoming data, never outgoing.

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>Someone (raj) explained me that a patch was missing, and that this patch

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>must me "patched" (poked) in order to see outbound data in promiscuous mode.

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>Many things to do .... So the question is : did someone has already this

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>"ready to use" PHNE_**** patch ?

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Two things:

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1. You do need a late "LAN products cumulative patch" (e.g. PHNE_18173

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for s700/10.20).

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2. You must use

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echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem

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You can insert this e.g. into /sbin/init.d/lan

Best regards,

Lutz

and

http://groups.google.com/groups?selm=88cf4t%24p03%241%40web1.cup.hp.com

which says:

Newsgroups: comp.sys.hp.hpux

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Subject: Re: tcpdump only shows incoming packets

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Date: 02/15/2000

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From: Rick Jones <foo@bar.baz.invalid>

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Harald Skotnes <harald@cc.uit.no> wrote:

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> I am running HPUX 11.0 on a C200 hanging on a 100Mb switch. I have

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> compiled libpcap-0.4 an tcpdump-3.4 and it seems to work. But at a

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> closer look I only get to see the incoming packets not the

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> outgoing. I have tried tcpflow-0.12 which also uses libpcap and the

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> same thing happens. Could someone please give me a hint on how to

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> get this right?

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Search/Read the archives ?-)

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What you are seeing is expected, un-patched, behaviour for an HP-UX

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system. On 11.00, you need to install the latest lancommon/DLPI

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patches, and then the latest driver patch for the interface(s) in use.

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At that point, a miracle happens and you should start seeing outbound

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traffic.

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

and

http://groups.google.com/groups?selm=38AA973E.96BE7DF7%40cc.uit.no

which says:

Newsgroups: comp.sys.hp.hpux

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Subject: Re: tcpdump only shows incoming packets

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Date: 02/16/2000

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From: Harald Skotnes <harald@cc.uit.no>

Rick Jones wrote:

...

> What you are seeing is expected, un-patched, behaviour for an HP-UX

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> system. On 11.00, you need to install the latest lancommon/DLPI

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> patches, and then the latest driver patch for the interface(s) in

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> use. At that point, a miracle happens and you should start seeing

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> outbound traffic.

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Thanks a lot. I have this problem on several machines running HPUX

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10.20 and 11.00. The machines where patched up before y2k so did not

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know what to think. Anyway I have now installed PHNE_19766,

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PHNE_19826, PHNE_20008, PHNE_20735 on the C200 and now I can see the

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outbound traffic too. Thanks again.

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(although those patches may not be the ones to install - there may be

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later patches).

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And another message to tcpdump-workers@tcpdump.org, from Rick Jones:

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Date: Mon, 29 Apr 2002 15:59:55 -0700

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From: Rick Jones

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To: tcpdump-workers@tcpdump.org

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Subject: Re: [tcpdump-workers] I Can't Capture the Outbound Traffic

...

http://itrc.hp.com/ would be one place to start in a search for the most

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up-to-date patches for DLPI and the lan driver(s) used on your system (I

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cannot guess because 9000/800 is too generic - one hs to use the "model"

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command these days and/or an ioscan command (see manpage) to guess what

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the drivers (btlan[3456], gelan, etc) might be involved in addition to

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DLPI.

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Another option is to upgrade to 11i as outbound promiscuous mode support

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is there in the base OS, no patches required.

Another posting:

http://groups.google.com/groups?selm=7d6gvn%24b3%241%40ocean.cup.hp.com

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indicates that you need to install the optional STREAMS product to do

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captures on HP-UX 9.x:

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Newsgroups: comp.sys.hp.hpux

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Subject: Re: tcpdump HP/UX 9.x

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Date: 03/22/1999

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From: Rick Jones <foo@bar.baz>

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Dave Barr (barr@cis.ohio-state.edu) wrote:

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: Has anyone ported tcpdump (or something similar) to HP/UX 9.x?

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I'm reasonably confident that any port of tcpdump to 9.X would require

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the (then optional) STREAMS product. This would bring DLPI, which is

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what one uses to access interfaces in promiscuous mode.

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I'm not sure that HP even sells the 9.X STREAMS product any longer,

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since HP-UX 9.X is off the pricelist (well, maybe 9.10 for the old 68K

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devices).

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Your best bet is to be up on 10.20 or better if that is at all

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possible. If your hardware is supported by it, I'd go with HP-UX 11.

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If you want to see the system's own outbound traffic, you'll never get

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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

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outbound traffic did happen).

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Rick Jones reports that HP-UX 11i needs no patches for outbound

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promiscuous mode support.

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

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Q: How do I get ethereral on HPUX to capture the _outgoing_ packets

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of an interface

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A: You need to get PHNE_20892,PHNE_20725 and PHCO_10947 (or

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newer, this is as of 4.4.00) and its dependencies. Then you can

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enable the feature as descibed below:

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Patch Name: PHNE_20892

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Patch Description: s700 10.20 PCI 100Base-T cumulative patch

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To trace the outbound packets, please do the following

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to turn on a global promiscuous switch before running

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the promiscuous applications like snoop or tcpdump:

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adb -w /stand/vmunix /dev/mem

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lanc_outbound_promisc_flag/W 1

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(adb will echo the result showing that the flag has

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been changed)

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$quit

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(Thanks for this part to HP-support, Ratingen)

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The attached hack does this and some security-related stuff

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(thanks to hildeb@www.stahl.bau.tu-bs.de (Ralf Hildebrandt) who

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posted the security-part some time ago)

<<hack_ip_stack>>

(Don't switch IP-forwarding off, if you need it !)

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Install the hack as /sbin/init.d/hacl_ip_stack (adjust

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permissions !) and make a sequencing-symlink

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/sbin/rc2.d/S350hack_ip_stack pointing to this script.

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Now all this is done on every reboot.

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According to Rick Jones, the global promiscuous switch also has to be

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turned on for HP-UX 11.00, but not for 11i - and, in fact, the switch

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doesn't even exist on 11i.

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Here's the "hack_ip_stack" script:

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-----------------------------------Cut Here-------------------------------------

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#!/sbin/sh

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#

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# nettune: hack kernel parms for safety

OKAY=0

ERROR=-1

# /usr/contrib/bin fuer nettune auf Pfad

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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

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# Syn-Flood-Protection an

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# ip_forwarding aus

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# Source-Routing aus

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# Ausgehende Packets an ethereal/tcpdump etc.

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/usr/contrib/bin/nettune -s tcp_random_seq 2 || exit $ERROR

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/usr/contrib/bin/nettune -s hp_syn_protect 1 || exit $ERROR

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/usr/contrib/bin/nettune -s ip_forwarding 0 || exit $ERROR

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echo 'ip_block_source_routed/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem || exit $ERROR

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echo 'lanc_outbound_promisc_flag/W 1' | adb -w /stand/vmunix /dev/mem || exit $ERROR

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exit $OKAY

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-----------------------------------Cut Here-------------------------------------

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