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Old 08-18-2009, 06:37 AM   #1
hadimotamedi
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Inquiry:Network Element IP Address


Dear All
Can you please do me favor and let me know if there is an utility on the Linux server that enables me to obtain the IP address of the other connected node that is an the same subnet ? (I mean my server is @172.16.17.159 and the other node is @172.16.17.XX and I want to obtain the other node IP address automatically) ?
Regards
H.Motamedi
 
Old 08-18-2009, 06:41 AM   #2
hadimotamedi
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Inquiry: Network Element IP Address

Dear All
Can you please do me favor and let me know if there is an utility on the Linux server that enables me to obtain the other network element IP address automatically ? I mean my server is @172.16.17.159 and the other network element is @172.16.17.XX and I want to obtain its IP address automatically .
Regards
H.Motamedi
 
Old 08-18-2009, 06:47 AM   #3
centosboy
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Quote:
Originally Posted by hadimotamedi View Post
Dear All
Can you please do me favor and let me know if there is an utility on the Linux server that enables me to obtain the IP address of the other connected node that is an the same subnet ? (I mean my server is @172.16.17.159 and the other node is @172.16.17.XX and I want to obtain the other node IP address automatically) ?
Regards
H.Motamedi
a bit long winded, but you can use nmap or netcat to scan the subnet.
or you can use any such network discovery tool.
there are loads - 2 of such are fing and cheops
 
Old 08-18-2009, 06:51 AM   #4
centosboy
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forgot to add link to fing

Code:
freshmeat.net/projects/fing
 
Old 08-18-2009, 07:16 AM   #5
lugoteehalt
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This any use?
 
Old 08-18-2009, 07:28 AM   #6
EricTRA
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Hello,

Some clarification is needed in my opinion. You have your first server (@172.16.17.159) on which you work and do stuff. You also have a second server of which you don't always know the IP address since it's configured to use DHCP. Is this correct?

If so, do you have a DNS server running? If yes then you can just do a ping to the hostname to get the IP.

If not, do you have access to the second server/workstation? If yes, get the MAC address.

If you run
Code:
arp -a
on your first server, you get a list of all connections in the ARP table which also lists your other machine. Find the line with the MAC address of your second machine and you get the IP.

Code:
man arp
will give you a lot more useful options.

Kind regards,

Eric
 
Old 08-18-2009, 03:15 PM   #7
schneidz
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i think nmap, netstat, ethereal mite help.
 
Old 08-19-2009, 12:32 AM   #8
hadimotamedi
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Quote:
Originally Posted by EricTRA View Post
Hello,

Some clarification is needed in my opinion. You have your first server (@172.16.17.159) on which you work and do stuff. You also have a second server of which you don't always know the IP address since it's configured to use DHCP. Is this correct?

If so, do you have a DNS server running? If yes then you can just do a ping to the hostname to get the IP.

If not, do you have access to the second server/workstation? If yes, get the MAC address.

If you run
Code:
arp -a
on your first server, you get a list of all connections in the ARP table which also lists your other machine. Find the line with the MAC address of your second machine and you get the IP.

Code:
man arp
will give you a lot more useful options.

Kind regards,

Eric
Thank you for your reply . Please be informed that my Linux server is at@172.16.17.159 and the other server on the Net has static ip address assigned in the range of@172.16.17.XX but I don't have its @ip exactly . Do you mind to let me know how can I obtain its IP address remotely as I have valid id/pwd to be able to log in ?
Regards
H.Motamedi
 
Old 08-19-2009, 12:37 AM   #9
chrism01
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Login as use

ifconfig

as root, or

/sbin/ifconfig

if not root user.
Feel free to post the results here.
Alternately, ping and/or nslookup the machine name, should return the IP.
 
Old 08-19-2009, 01:46 AM   #10
settntrenz
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Assuming nmap is not prohibited on your network,

One solution would be to use a process of elimination.

Is the target machine running an ssh server? If so

Code:
nmap -sV -p22 172.16.17.1-254
Look to see which systems report that SSH is open and listening.

man nmap for further documentation.
 
Old 08-22-2009, 10:01 AM   #11
pixellany
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I have merged your duplicate threads. In the future please have only on thread on a particular question.
 
  


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