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Thanks a lot RudiC -:) but It is not so easy for me to follow this script .(to high for me)
Any way i am keeping it and i will study it later on.

I should say that I learned a lot from you,...

Thank you for your answer but you are talking to a newbee in scripting so ?!

Thanks again .

LOL, actually I am using all the combined codes of all the previews posts for my firewall ;-) (your codes)

Now, this is different, i want to fill a file /etc/ethers with these two columns IP &...

Thank you for the very quick reply Scott
It seem's so simple when we see the solution ......

Thanks again,

---------- Post updated at 10:45 AM ---------- Previous update was at 10:35 AM...

Hy,

I'm still working on the same firewall :-)

I've got a file with such a following lines:
192.168.0.6 00:71:CC:6E:A3:33
192.168.0.7 C0:38:96:72:8B:5B
192.168.0.8 ...

Exactly, that's my GOAL RudiC :b:

Thanks

---------- Post updated at 02:37 PM ---------- Previous update was at 02:35 PM ----------

I will try to put every thing in just one script and i will...

Yes as usual you are the best. It works perfectly.
You 're right i should post my own script first and then .....

Well the result will be written in a file called "ipblocked"

and then i will...

Hy Rudic, nice to hear you again.
Well, NO they are not included.

Thanks RudiC

---------- Post updated at 01:49 PM ---------- Previous update was at 01:48 PM ----------

Just those who are...

Hy everybody,

Within a dhcpd.conf file, we got some fixed IP adresses from 192.168.0.1 - 192.168.0.254.

Sample:
#ddns-update-style interim;
ddns-update-style none;
ignore client-updates;...

Of course you are welcomed :)
Thank you sir.

Yeah, you got it RudiC, thanks a lot -:)

I am jealous, i want to got your skills in scripting .

can you suggest any book, tutorials, .... for me.

Thank you very much for your patience with...

I am sorry, RudiC,

The following is what i typed (code):
sed -n '/hardware ethernet/ {s///; h; d;}; /fixed-address / {s///; G; s/[;\n]//g; s/ / -p tcp -m multiport --dports...

Oh yes i need it for the other thread (https://www.unix.com/shell-programming-and-scripting/275112-bash-script-who-maps-ip-mac-address.html) , it will be the ipmacmap file if you remember :)


...

Hy over there,

Lets make it simple :)

Using a bash script, how to grep only the ip address and the mac address and put them in a file:.

for example from the dhcp.conf file we got such...

Agree with you RudiC.

Thanks for your good job :b:

Red

YES exactly i want to execute these two lines hopefully -:)
If i launch manually the two lines (one by one) it will do the work.

So now how to include them into the bash script !!!

I Think...

These two lines are OK , i can see them on the screen.

What i want to do is :
These two lines should be inside my firewall and not just displayed on the screen (netfilter 'iptables')

if i use...

OK, thank you very much RudiC,

It shows the match between the IP and the MAC :b:

Now i want the result of your code to be part of the firewall. I mean with the following command:



i...

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...

Hy every body,

Unfortunately and without success, i want to write a bash script who maps a known IP addess to a known MAC address using iptables and for the FORWARD chain.

Within the DHCP...