nettl

[Brent W. Moll]

how do I use nettl to look inside the tcp packets ?

[Sridhar Bhaskarla]

Hi Brett,

You use nettl to capture the information and netfmt to format the output. Man nettl and netfmt for more information. With 11i, there is an interface provided called 'nettladm' that can ease your job.

The document below gives the usage of nettl |netfmt in some detail.

http://docs.hp.com/hpux/onlinedocs/J2237-90005/J2237-90005.html

-Sri

[Brent W. Moll]

This seems to show the errors recieved. Which is a good thing..

However I was asked to find a way to look inside the packets streaming though the LAN.

How is that accomplished ?

[Geoff Wild]

What about something like tcpdump?

http://hpux.ee.ualberta.ca/hppd/hpux/Networking/Admin/tcpdump-3.8.1/

Then there is tcptrace to analyze the data:

http://hpux.ee.ualberta.ca/hppd/hpux/Sysadmin/tcptrace-6.4.2/

Rgds...Geoff

[Clay Jordan]

I would suggest Ethereal as an alternative to nettl for more detailed analysis as it has the capability to filter and display as much or little of each packet as you need. You can download all the required depots from the HP Porting and Archive center at http://hpux.connect.org.uk/.

It requires several pieces as listed below but they are all available precompiled as depots there. I had to use it to prove our firewall was dropping packets at certain intervals. Although there is a command line tool, there is also a very intuitive GUI.

ethereal 0.9.15
expat 1.95.7
gettext 0.12
glib 1.2.10
gtk+ 1.2.10
libiconv 1.9
libpcap 0.7.2
openssl 0.9.7c
zlib 1.1.4