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Full Discussion: Script getting IP's and MAC addresses
Top Forums Shell Programming and Scripting Script getting IP's and MAC addresses Post 303006604 by hermouche on Saturday 4th of November 2017 12:21:11 PM
Old 11-04-2017
Quote:
Originally Posted by RudiC
OK, let's combine the two. Try

Code:
sed -n '/hardware ethernet/ {s///; h; d;}; /fixed-address / {s///; G; s/[;\n]//g; s/ / -m --mac-source /; s/^/iptables -I FORWARD -s /; s/$/ -j ACCEPT/; p;}' dhcp.conf

Actually, you don't need a script to execute this. In a recent bash,

you can deploy "process substitution" for the sourceing:
Code:
. <(sed -n '/hardware ethernet/ {s///; h; d;}; /fixed-address / {s///; G; s/[;\n]//g; s/ / -m --mac-source /; s/^/iptables -I FORWARD -s /; s/$/ -j ACCEPT/; p;}'  dhcp.conf)

And, if you need this frequently, add an alias definition to your .profile:
Code:
alias FWD=". <(sed -n '/hardware ethernet/ {s///; h; d;}; /fixed-address /  {s///; G; s/[;\n]//g; s/ / -m --mac-source /; s/^/iptables -I  FORWARD -s /; s/$/ -j ACCEPT/; p;}'  dhcp.conf)"

I am sorry, RudiC,

The following is what i typed (code):
Code:
sed -n '/hardware ethernet/ {s///; h; d;}; /fixed-address / {s///; G; s/[;\n]//g; s/ / -p tcp -m multiport --dports 110,143,25,465,585,993,995,80,443 -m mac --mac-source /; s/^/iptables -I FORWARD -s /; s/$/ -j ACCEPT/; p;}' dhcpd.conf

This is my result so far:
Code:
iptables -I FORWARD -s  -p tcp -m multiport --dports 110,143,25,465,585,993,995,80,443 -m mac --mac-source                192.168.0.208                 30:10:B3:42:40:46 -j ACCEPT

This is how it should be:
Code:
iptables -I FORWARD -s 192.168.0.208 -p tcp -m multiport --dports 110,143,25,465,585,993,995,80,443 -m mac --mac-source 30:10:B3:42:40:46 -j ACCEPT

And that's part of my dhcpd.conf file:

Code:
#ddns-update-style interim;
ddns-update-style none;
ignore client-updates;
deny client-updates;
authoritative;

#### By red for PXE Booting
allow booting;
allow bootp;
### End by red

log-facility local6;

subnet 192.168.0.0 netmask 255.255.255.0 {
        # --- default gateway

        ##### By red for PXE booting
        class "pxeclients" {    match if substring(option vendor-class-identifier, 0, 9) = "PXEClient";
        next-server 192.168.0.1;
        filename "linux-install/pxelinux.0"; }
        #### End by red

        option routers 192.168.0.1;
        option subnet-mask 255.255.255.0;
        # option nis-domain             "domain.org";
        option domain-name "ensm.intranet";
        option domain-name-servers 192.168.0.1;
        option time-offset -18000;
        range dynamic-bootp 192.168.0.5 192.168.0.239;
        default-lease-time 3600;
        max-lease-time 7200;
        # we want the nameserver to appear at a fixed address

## by red: ICI on desire reserver des adresses IP fixes a des machines ##
group {
        use-host-decl-names true;


host s6 {
                hardware ethernet E8:50:8B:F3:98:F6;
                fixed-address 192.168.0.254;
                }


        host yacine {
                hardware ethernet E8:50:8B:E1:E9:35;
                fixed-address 192.168.0.253;
                }

        host hanane {
                hardware ethernet 3C:FA:43:B1:13:3A;
                fixed-address 192.168.0.252;
                }

Thanks.


Moderator's Comments:
Mod Comment Please use CODE (not QUOTE) tags as required by forum rules!
Last edited by RudiC; 11-05-2017 at 06:07 AM.. Reason: Changed QUOTE to CODE tags.
 

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