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Top Forums Shell Programming and Scripting Bash script who maps IP with MAC address Post 303006443 by hermouche on Thursday 2nd of November 2017 09:21:47 AM
Old 11-02-2017
RedHat Bash script who maps IP with MAC address

Quote:
Originally Posted by RudiC
Without understanding what the request be, I'd be surprised if you could assign IPs amd MACs randomly reading from two independent files.
You should either read and use the DHCP config file, or the actual DHCP server's tables to find relations between the two.
Thanks a lot RudiC & Scruticizer for your reply,

Well,
1- I've got all the IP addresses with their respective MAC addresses in the DHCP server

2- I can also edit a file where i got two columns, one for the IP and the other for the MAC:

Code:
192.168.0.10    xx:xx:xx:xx:xx:xx
       192.168.0.11    aa:aa:aa:aa:aa:aa
        ................................................

Now either with the dhcp server or with the two columns file, is it possible to have at the end of the day, using a bash script something like:

Quote:
iptables -I FORWARD -s 192.168.0.10 -m --mac-source xx:xx:xx:xx:xx:xx -j ACCEPT
iptables -I FORWARD -s 192.168.0.11 -m --mac-source aa:aa:aa:aa:aa:aa -j ACCEPT
Sorry for my very basic english Smilie

Thanks again for your interest and reply SmilieSmilie

red

Last edited by rbatte1; 11-03-2017 at 08:33 AM..
 

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jdbreg(8)						      System Manager's Manual							 jdbreg(8)

NAME
jdbreg - Registers hosts in the DHCP dynamic databases. SYNOPSIS
/usr/sbin/jdbreg [-d] [-e] [-f character] [-s] [-l | -n] [-o] [-w] filename... OPTIONS
Deletes the records whose keys are implied by the input file(s). Uses character as the field separator. The default is the pipe | charac- ter. Display all currently registered hosts. DESCRIPTION
The jdbreg program registers (or removes) hosts for configuration by DHCP. When the registered_hosts_only policy is in effect, the server configure only clients whose MAC addresses are so registered. When this policy is not in effect, registering hosts has no effect. Each record to be loaded is terminated by a newline, and the fields within each record delimited by default with the pipe (|) character, although this may be changed with the -f command line option. The fields within the data file(s) to be loaded are as follows: MAC address MAC address type MAC address length (octets) RESTRICTIONS
Because the database used by join does not support multiuser concurrently, applications that write to it, lock the entire database. This means that you cannot use jdbreg while joind is running. The converse is also true. FILES
SEE ALSO
Commands: joind(8) jdbreg(8)
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