Hi
I have developed a website. Now i would like to monitor the IP address of machines who are accessing the server.
The simplest possible solution to this that comes first into my mind is to use jsp inbuilt tags.
but it has given me some other IP address(May be a proxy server's ip address)
So i was left with one choice is to run netstat on host server .
Here is what i have done.
Should i modify the command or there is any other way around to monitor the IP address?
Last edited by zaxxon; 05-07-2010 at 08:42 AM..
Reason: use code tags please, ty
Hello,
I am a system's monitoring consultant but I am not very well acquainted with the Unix/Linux world.
I am looking for a "best of breed" monitoring solution for Unix/Linux in general and HPUX/RH in particular.
Something more "enterprise class" with a broad vision (towards BSM, CRM,... (1 Reply)
Setup a site to site VPN between two cisco routers.
One of the site locations is unable to access ports such as https://example.com:9001
How do I let them go into port 9001?
They can ssh, ftp, telnet and everything else.
Is this a VPN issue or ACL access issue?
I put
permit ip host... (0 Replies)
hi Gurus,
Need to pick your brains on this minor script project.
I would like to continuously monitor a log file with sample log messages as below, and if PSOldGen percentage is either 99% or 100% for consecutively 10 times, alert someone.
{Heap before gc invocations=46516:
PSYoungGen ... (6 Replies)
Hi All,
This is for WPAR monitoring shell script, earlier opened thread was closed, had to open a new thread, as suggested I have used script as below, But am trying to get the output in below format, need suggestions with it. Below is the lswpar output, required output format.
... (7 Replies)
Hi,
I am trying to establish vpn between my linux server and cisco asa at client side.
I installed openswan on my cent os.
Linux Server
eth0 - 182.2.29.10
Gateway - 182.2.29.1
eth1 - 192.9.200.75
I have simple IPtables Like
WAN="eth0"
LAN="eth1" (0 Replies)
Hi All,
Its urgent.. pls help me out.. I want to create a KSH which should generate a report with the list of users and the files larger than 5 GB created by them in a direcorty and send autogenerated e-mail to them.
my input would be users list,directory path and the file size (say 5 GB)
... (11 Replies)
Q: "Does Cisco 1921 router support,, act as an endpoint for, site to site VPNs using IPSec? If so, how many? "
A: If you get the Cisco 1921/k9 with the security services bundle then it will have built in security features. Cisco, typically includes IP Sec tunnels I believe as part of that... (0 Replies)
Hi @all,
I try to connect 2 LANs with IPSec/Openswan
LAN 1: 192.168.0.0/24
LAN 2: 192.168.1.0/24
This is my Config:
conn HomeVPN # # Left security gateway, subnet behind it, nexthop toward right. left=192.168.1.29 ... (1 Reply)
Discussion started by: bahnhasser83
1 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)