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Iptables at boot

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  Iptables at boot Jacques Rodary <rodaryj@free.fr> - 2018-01-20 23:50 +0100
    Re: Iptables at boot Dejan Jocic <jodejka@gmail.com> - 2018-01-21 02:10 +0100
      Re: Iptables at boot Mark Fletcher <mark27q1@gmail.com> - 2018-01-21 04:20 +0100
        Re: Iptables at boot Dejan Jocic <jodejka@gmail.com> - 2018-01-21 10:10 +0100
        Re: Iptables at boot Ben Caradoc-Davies <ben@transient.nz> - 2018-01-21 21:00 +0100
          Re: Iptables at boot Alessandro Vesely <vesely@tana.it> - 2018-01-25 10:20 +0100
      Re: Iptables at boot Karol Augustin <karol@augustin.pl> - 2018-01-22 17:00 +0100

#191382 — Iptables at boot

Hi
How can I start iptables at boot. I don't find  an equivalent to  " 
service iptables start" with systemd and does'nt know how to create a 
new iptables.service. The manpages aren't quite clear for me. Thanks for 
any help.
   Jacques

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#191383

On 20-01-18, Jacques Rodary wrote:
> Hi
> How can I start iptables at boot. I don't find  an equivalent to  " service
> iptables start" with systemd and does'nt know how to create a new
> iptables.service. The manpages aren't quite clear for me. Thanks for any
> help.
>   Jacques
> 

There are two options. One would be to learn to write systemd service
units. There are many tutorials on net for how to write those with
examples. Other would be to install iptables-persistent package. You can
find more about using iptables-persistent package if you google it, you
will surly run on few quick howtos.

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#191384

On Sun, Jan 21, 2018 at 02:02:07AM +0100, Dejan Jocic wrote:
> On 20-01-18, Jacques Rodary wrote:
> > Hi
> > How can I start iptables at boot. I don't find  an equivalent to  " service
> > iptables start" with systemd and does'nt know how to create a new
> > iptables.service. The manpages aren't quite clear for me. Thanks for any
> > help.
> >   Jacques
> > 
> 
> There are two options. One would be to learn to write systemd service
> units. There are many tutorials on net for how to write those with
> examples. Other would be to install iptables-persistent package. You can
> find more about using iptables-persistent package if you google it, you
> will surly run on few quick howtos.
> 
> 

To get you started [addressing the OP], here is the service file I use:

[Unit]
Description=Load Iptables Rules
ConditionFileIsExecutable=/etc/systemd/scripts/iptables
After=network.target

[Service]
Type=forking
ExecStart=/etc/systemd/scripts/iptables
TimeoutSec=0
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

This goes in /lib/systemd/system/iptables.service and assumes your 
iptables commands are in a script which is called iptables, is 
executable, and is located in /etc/systemd/scripts

I must point out there may be Debian policies of which I am not aware 
about where the files should ideally go; I lifted this configuration 
from a non-Debian box. There is nothing about it that will _not work_ on 
Debian, but there may be a preferred Debian location for such files, 
which hopefully my contribution will encourage someone knowledgable to 
add.

then to run it once, as root:
systemctl start iptables

and to set it up so it runs at boot, as root:
systemctl enable iptables

HTH

Mark

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#191387

On 21-01-18, Mark Fletcher wrote:
> On Sun, Jan 21, 2018 at 02:02:07AM +0100, Dejan Jocic wrote:
> > On 20-01-18, Jacques Rodary wrote:
> > > Hi
> > > How can I start iptables at boot. I don't find  an equivalent to  " service
> > > iptables start" with systemd and does'nt know how to create a new
> > > iptables.service. The manpages aren't quite clear for me. Thanks for any
> > > help.
> > >   Jacques
> > > 
> > 
> > There are two options. One would be to learn to write systemd service
> > units. There are many tutorials on net for how to write those with
> > examples. Other would be to install iptables-persistent package. You can
> > find more about using iptables-persistent package if you google it, you
> > will surly run on few quick howtos.
> > 
> > 
> 
> To get you started [addressing the OP], here is the service file I use:
> 
> [Unit]
> Description=Load Iptables Rules
> ConditionFileIsExecutable=/etc/systemd/scripts/iptables
> After=network.target
> 
> [Service]
> Type=forking
> ExecStart=/etc/systemd/scripts/iptables
> TimeoutSec=0
> RemainAfterExit=yes
> 
> [Install]
> WantedBy=multi-user.target
> 
> This goes in /lib/systemd/system/iptables.service and assumes your 
> iptables commands are in a script which is called iptables, is 
> executable, and is located in /etc/systemd/scripts
> 
> I must point out there may be Debian policies of which I am not aware 
> about where the files should ideally go; I lifted this configuration 
> from a non-Debian box. There is nothing about it that will _not work_ on 
> Debian, but there may be a preferred Debian location for such files, 
> which hopefully my contribution will encourage someone knowledgable to 
> add.
> 
> then to run it once, as root:
> systemctl start iptables
> 
> and to set it up so it runs at boot, as root:
> systemctl enable iptables
> 
> HTH
> 
> Mark
> 

Location for local custom unit files should be /etc/systemd/system but
it can be on several more places, if you desire so. It is just that
those in /etc/systemd/system take precedence over others.

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#191401

On 21/01/18 16:05, Mark Fletcher wrote:
> To get you started [addressing the OP], here is the service file I use:

Mine is slightly different and has the commands inline:


$ cat /etc/iptables/iptables.service
[Unit]
Description=iptables rules
After=network.target

[Service]
Type=oneshot
ExecStart=/bin/bash -c "/sbin/iptables-restore < 
/etc/iptables/iptables.rules"
ExecStart=/bin/bash -c "/sbin/ip6tables-restore < 
/etc/iptables/ip6tables.rules"
RemainAfterExit=yes
ExecStop=/sbin/iptables -F
ExecStop=/sbin/ip6tables -F

[Install]
WantedBy=multi-user.target


You can make your initial rules file with iptables-save.

Kind regards,

-- 
Ben Caradoc-Davies <ben@transient.nz>
Director
Transient Software Limited <https://transient.nz/>
New Zealand

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#191513

On Sun 21/Jan/2018 20:53:43 +0100 Ben Caradoc-Davies wrote:
> On 21/01/18 16:05, Mark Fletcher wrote:
>> To get you started [addressing the OP], here is the service file I use:
> 
> Mine is slightly different and has the commands inline:
> 
> 
> $ cat /etc/iptables/iptables.service
> [Unit]
> Description=iptables rules
> After=network.target

Shouldn't that be /network-pre.target/?  I'm not familiar with systemd (I use
sysvinit) but I read "It's primary purpose is for usage with firewall services
that want to establish a firewall before any network interface is up" in:
https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/

Best
Ale

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#191411

On 2018-01-21 1:02, Dejan Jocic wrote:
> On 20-01-18, Jacques Rodary wrote:
>> Hi
>> How can I start iptables at boot. I don't find  an equivalent to  " service
>> iptables start" with systemd and does'nt know how to create a new
>> iptables.service. The manpages aren't quite clear for me. Thanks for any
>> help.
>>   Jacques
>>
> 
> There are two options. One would be to learn to write systemd service
> units. There are many tutorials on net for how to write those with
> examples. Other would be to install iptables-persistent package. You can
> find more about using iptables-persistent package if you google it, you
> will surly run on few quick howtos.


If you don't want to learn systemd at this stage you can put your
iptables lines in /etc/rc.local (before exit 0 line). It will be run
during boot and add your iptables config. I know it's not elegant
solution by any means but it works if you don't want to play with
services at this stage.


-- 
Karol Augustin
karol@augustin.pl
http://karolaugustin.pl/
+353 85 775 5312

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