My system is configured in such a way to respond for ICMP broadcast and multicast requests from outside our network. Below command will give the details:
It means currently it is enabled to respond to ICMP broadcast and multicast requests.
Command to get system interface broadcast address is ifconfig –a and command to get system interface multicast address is arp –a.
Code:
server:~# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
ce3: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
inet 10.0.1.1 netmask ffffff00 broadcast 10.191.2.255
server:~# arp -a
Net to Media Table: IPv4
Device IP Address Mask Flags Phys Addr
ce3 server1 255.255.255.255
ce3 server2 255.255.255.255 SPLA
ce5 server3 255.255.255.255 SPLA
ce4 server4 255.255.255.255 SPLA
ce5 224.0.0.0 240.0.0.0 SM
ce4 224.0.0.0 240.0.0.0 SM
ce3 224.0.0.0 240.0.0.0 SM
Note: M indicates it is the multicast address used by that interface.
Queries:
> If I tried sending ICMP request to multicast address by following command: ping 224.0.0.0 from my laptop, I didn’t get response from server1. (as the above parameters are enabled, I need to get response)
> If I tried sending ICMP request to broadcast address by following command: ping 10.191.2.255 from my laptop, I didn’t get response from server1. (as the above parameters are enabled, I need to get response)
Rgrds,
Ram.
Last edited by DukeNuke2; 11-19-2009 at 06:39 AM..
Reason: code tags please!
I have an application where I need to configure a router to pass through ping requests (ICMP type http://www.dd-wrt.com/phpBB2/images/smiles/icon_cool.gif through to the LAN port. I have a Linksys WRT54GS with tiny DD-WRT V24 SP2 installed. I am adding the following iptables rules:
iptables -t... (0 Replies)
Hi,
I am using following command:
tcpdump -i eth1 icmp =8 >output.txt
i want this command to get execute for a minute only. How can we do this?
Thanks.
Please use code tags next time for your code and data. Thanks (2 Replies)
Hi all,
I cannot reach my SERVER from my NetBackup server connect through SERVER_prv ("cannot connect to client")
My SERVER was Sun OS 5.8, below is the message i get when i ping my SERVER:
# ping 192.168.X.X or
# ping SERVER_prv
ICMP Net Unreachable from gateway 172.16.102.XXX
for... (3 Replies)
hi,
I am trying to configure one of my interfaces, but after reboot - i lose the changes to the netmask & broadcast address.
I have added an entry in /etc/netmasks, but it doesnt pick up the new settings. any ideas - much appreciated.
before reboot:
eri0:... (3 Replies)
Hi All,
How to disable ICMP time stamp request and time stamp reply of a machine?
How to test this feature from remote machine?
Please reply back
Vasanth (2 Replies)
Assuming I have the following entry in my httpd.conf file
<Directory /usr/local/www/apache22/data>
AddHandler python-program .py
PythonHandler form.py
PythonDebug On
</Directory>
am I allowed to set a reference to another python script such as
myscript.py in the httpd.conf file, or can... (0 Replies)
Hello! I'm in extra urgent need to have a program that sends a series of ICMP echo requests over the network to a specified host and waits until the last echo reply is received.
I know little about socket-programming (in particular I've never dealt with icmp sockets) that's why i'm desperate!! :)... (5 Replies)
Hi There,
I am looking to disable ICMP timestamp requests and ICMP timestamp replies on my Linux server version 8. Can someone please tell me the simplest way to do this? I know a command to disable all ICMP traffic but this I have been told will cause many network problems which I... (2 Replies)
