Well, I was actually looking for outgoing requests for this, not incoming. I did a little bit of experiementing with tcpdump and could see this being set:
So it appears to be working. I'm all ears if anyone thinks this is incorrect. Here is the code I modified from the previous link:
I want to change the IPsetting and the broadcast setting.
With ipconfig I get this:
hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet xx.17x.18x.xx netmask fffffff0 broadcast xx.17x.18x.xx
ether yy:0:yy:b6:yy:xx
What command(squence) do I use to... (6 Replies)
Hi
On several AIX 5.3 LPARs the timezone is currrently set to:
TZ=NZST-12NZDT,M9.5.0/02:00,M4.1.0/03:00
Daylight savings in NZ starts on Sun 28th Sep 2008, which is the fourth Sunday. Do I need to change my TZ variable to NZST-12NZDT,M9.4.0/02:00,M4.1.0/03:00 or will AIX interpret the fifth... (2 Replies)
I am not a Unix / AIX admin, but am working with one that doesn't seem to know how to set up syslog to forward messages to me the way I need them. Every message they send me has "Message forwarded from <insert host name here>:" but I need it to only have the host name.
In the examples below,... (2 Replies)
Hi,
I had to setup some cron jobs using crontab -e when logged in as root.
I noticed that the jobs only run when the permissons on the shell script file are set to execute on root and other. Why does "other" have to have its execution permission set? (6 Replies)
I need to "sync" a directory from a prod server to a test server. Rsync is working but it prompts for a password and I'd like to automate the process. The directory on the prod/source server is owned by root, and some subdirectories are only readable by root. On the test/destination servers, I can... (1 Reply)
Hi there
There's a script I would like to run daily every 5 minutes and this job should restart every 12:03AM so it would append to a new file with the following day date format instead of running and updating continuously into one log. I am not sure of the syntaxing, what I did was to set it... (9 Replies)
I have a Win7 laptop that I have installed Xming with Xlaunch so that I can remote a Solaris10 server. After the initial install on my Win7 machine what do I need to set and configure to be able to remote Solaris. This is my 3rd day working with Unix. (1 Reply)
Trying to figure out the best method of security for oracle user accounts. In Solaris 10 they are set as regular users but have nologin set forcing the dev's to login as themselves and then su to the oracle users.
In Solaris11 we have the option of making it a role because RBAC is enabled but... (1 Reply)
I communicate with the server via a ssh tunnel, configured via Putty.
Recently, I'm trying to forward the X11 through it, but it doesn't work.
Is there any one work this way?
Searched with google, but didn't find anything.
Thx in adv. (2 Replies)
Discussion started by: sleepy_11
2 Replies
LEARN ABOUT SUSE
dhcpdump
DHCPDUMP(1) General Commands Manual DHCPDUMP(1)NAME
dhcpdump - DHCP packet dumper
SYNOPSIS
dhcpdump [-h regular-expression]
DESCRIPTION
This command parses the output of tcpdump to display the dhcp-packets for easier checking and debugging.
USAGE
tcpdump -lenx -s 1500 port bootps or port bootpc | dhcpdump
If you want to filter a specific Client Hardware Address (CHADDR), then you can specifiy it as a regular expressions:
tcpdump -lenx -s 1500 port bootps or port bootpc | dhcpdump -h ^00:c0:4f
This will display only the packets with Client Hardware Addresses which start with 00:c0:4f.
OUTPUT
TIME: 15:45:02.084272
IP: 0.0.0.0.68 (0:c0:4f:82:ac:7f) > 255.255.255.255.67 (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: 28f61b03
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 00:c0:4f:82:ac:7f:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 54 ( 4) Server identifier 130.139.64.101
OPTION: 50 ( 4) Request IP address 130.139.64.143
OPTION: 55 ( 7) Parameter Request List 1 (Subnet mask)
3 (Routers)
58 (T1)
59 (T2)
At the option field, the first field is the value of the option, the second one (between brackets) is the length of the option-datafield,
the third field is the name of the option, the fourth field is the data of the option.
RETURN VALUES
Always 0.
NOTES
Privileged access is often needed for tcpdump.
BUGS
Not all the parameter options are printed verbose, because of lack of documentation. Not all the options are tested, because of lack of
clients/servers with these options. If you have a dump of one of them, please send them to me and I'll incorperate them.
THANKS TO
Ralph Droms and Ted Lemons "The DHCP Handbook", ISBN 1-57870-137-6.
Peter Apian-Bennewitz <apian@ise.fhg.de> for his Client Hardware Address filtering
AUTHOR
Edwin Groothuis, edwin@mavetju.org (http://www.mavetju.org)
SEE ALSO dhcpd(8), tcpdump(1), RFC2132
November 21, 2003 November 21, 2003 DHCPDUMP(1)