So you need the MAC address and the IP address from the DHCP server??
Use awk or perl to scan in the DHCP file and remember mac/ip's. Then scan in the radius log, matching MACs to the hash-array used in step 1. Print the line from radius log with the extra info:
Tweaks might be necessary.
Hi,
I would like to setup a FOR loop script to find out all the existing linux workstation in the network w/ ip address, hostname and linux version.
I created a basic FOR loop script:
for i in $(seq 1 254)
do
echo 10.72.169.$i >> result
ssh -o ConnectTimeout=3 root@10.72.169.$i... (14 Replies)
I need some help to write a C++ code that read and write the register of a sequencer. I have to make a code that relate the objects with the physical address but I am a bit confuse. Could someone suggest me how to proceed? in which parts do I split the code?
thanks (1 Reply)
We want to use RADIUS to authenticate our AIX server logins. Can anybody tell me how to set on AIX server up to use a Radius server to authenticate or point me to documentation on setting up AIX to use Radius to authenticate user login.
Our problem is that we have a few users that access our... (1 Reply)
I guess I probably ask a dumb question but why use RADIUS for authentication as there are many ways to do it, as authentication is basically a user/password check?
What is the benifit(s) of using it ?
Thanks! (3 Replies)
Hi,
I have to parse the dhcp.lease file and have to keep the most recent entry and remove the rest and also the number of lines between any two leases might not always be the same.
eg:
lease 5.5.5.252 {
starts Wed Jul 27 09:48:39 2011
ends Wed Jul 27 21:48:39 2011
tstp Wed Jul... (1 Reply)
Hello everyone, I have a question in regards to connecting with wpa_cli to a Radius server. I can connect fine through WPA Enterprise and WPA2 Enterprise, but I'm lost on trying to connect to Radius.
wpa_cli -iwlan0 set_network 0 ssid '"ssid"'
wpa_cli -iwlan0 set_network 0 key_mgmt WPA-EAP... (0 Replies)
Hi all
I have no idea what I am doing, I think I am learning...the previous linux admin left the company and I volunteered to help.
My first task is to create a user (X) account in the radius. I was able to do that.. This user (X) will be login in to a cisco device same as user (Z) .
... (3 Replies)
Hi,
we have multiple database instances running on solaris server like db1, db2 and db3. Below shown ipcs -pmb shared memory segment output. Using cpid value I want to relate to the database instances db1, db2 and db3. Please let me know how to do this?
$ ipcs -pmb
IPC status from <running... (9 Replies)
Discussion started by: baladelaware73
9 Replies
LEARN ABOUT DEBIAN
dhcping
dhcping(8) General Commands Manual dhcping(8)NAME
dhcping - send a DHCP request to DHCP server to see if it's up and running
SYNOPSIS
dhcping [-v] [-q] [-i] [-r] -t maxwait -c client-IP-address -s server-IP-address -h client-hardware-address [-g gateway-IP-address]
DESCRIPTION
This command allows the system administrator to check if a remote DHCP server is still functioning.
Options are:
-v Verbose, print some information.
-V Very verbose, print a lot of information.
-i Use DHCPINFORM packets.
-r Use DHCPREQUEST packets (default behaviour).
-q Quiet, print nothing on the screen.
-t maxwait
Maximum time to wait for an answer from the server in seconds. Default is 3 seconds.
-c client-IP-address
Request this IP address. Note that this is also the IP address the answer will be sent to.
-s server-IP-address
Send the DHCP packet to this IP address.
-h client-hardware-address
Use this hardware-address in the DHCP request. It can be up to sixteen octets separated by colons (i.e. 01:02:03:04)
-g gateway-IP-address
Use this IP address for the gateway IP address in the DHCP packet. This option is currently broken.
RETURN VALUES
If everything goes okay, it returns 0. If there went something wrong, it returns 1.
SETUP
This program should be installed setuid root or ran by root only. See SECURITY for more information.
On your DHCP server, add these lines to the dhcpd.conf:
host <your monitoring host FQDN> {
hardware ethernet <your monitor host mac address>;
fixed-address <your monitoring host IP address>;
}
Then try it:
$ dhcping -c your monitoring host IP address
-s your DHCP server IP address
-h your monitor host mac address
It will either respond with "no answer" or "Got answer from: your DHCP server IP address"
The DHCP server logfile will give:
DHCPREQUEST for 192.168.1.1 from 00:20:18:56:29:8f via ed0
DHCPACK on 192.168.1.1 to 00:20:18:56:29:8f via ed0
DHCPRELEASE of 192.168.1.1 from 00:20:18:56:29:8f via ed0 (found)
Running in DHCPINFORM mode with -i:
If you see "DHCPINFORM from 192.168.1.1 via xl0: not authoritative for subnet 192.168.1.0", you should add the authoritative statement to
the subnet, See dhcpd.conf(5) for details.
When running in very verbose mode, dhcping tries to dump all data of the send and received DHCP packets. It will first dump the packet in
hex-format, then decodes the header and finally the options.
HOW IT WORKS
The client either sends a DHCPREQUEST or DHCPINFORM packet to the server and waits for an answer. Then, if a DHCPREQUEST was send, it will
send a DHCPRELEASE back to the server.
SECURITY
This program is installed setuid root as it requires the privileges to bind itself to port 68 (bootpc). Root privileges are dropped as soon
as the program has bound itself to that port.
BUGS
Currently (this may, or may not, change in the future) the ISC DHCP daemon does not write leases with a fixed IP address in the
dhcpd.leases file.
DHCPINFORM packets can only be used on subnets the server is authoritative for. If the monitoring script runs on a subnet the server isn't
authoritative for, it should use the DHCPREQUEST packets. I also experienced some problems with ISC DHCPD v2 servers, but that is also in
the README of it.
The -V option is still working, but shouldn't be used for debugging of the packets. Better use dhcpdump(8) for that, which is available on
my website. I wanted to remove it, but decided only to do it from the documentation, not from the code. Maybe I'll need it one day for
debugging.
AUTHOR
Edwin Groothuis, edwin@mavetju.org (http://www.mavetju.org)
SEE ALSO dhcpd(8), dhclient(8), dhcpd.conf(5), dhcpdump(8)3rd Berkeley Distribution January 27, 2002 dhcping(8)