Ip6tables On C7

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Working on a script, and to test, I need to shut down ip6tables temporarily. firewalld is running; is there any way to shut down *just*
ip6tables?

I tried installinf iptables-services, and did a systemctl stop ip6tables, and no joy.

mark

4 thoughts on - Ip6tables On C7

  • Hi

    I believe this should remove any ipv6 rules (rules and chains)

    ip6tables -F
    ip6tables -X

    You may need to set the default policies as well, as they I belive are to deny all incoming and unrestricted outgoing

    ip6tables -P INPUT DROP
    ip6tables -P FORWARD DROP
    ip6tables -P OUTPUT ACCEPT

    Regards

    Andrew

  • You might want to clear the other tables, too:

    for x in filter nat mangle raw security “”
    do
    ip6tables ${x:+-t $x} -F
    ip6tables ${x:+-t $x} -X
    done

    firewalld appears to leave the policies as ACCEPT, which is their default.

  • Gordon Messmer wrote:

    I think y’all misunderstood me – I just want to say “turn off”, run my script to test it, and turn it back on.

    However, I found out something: iptables -L gives the rules, also….*only* for IPv4; ip6tables -L does the same for only 6. And it does look as though by shutting down ip6tables, it did turn them off –
    ip6tables shows on 8 lines, which are all aCCEPT. I’d been looking at the o/p of iptalbes-save, and ip6tables-save.

    Thanks, though.

    mark

  • I think we understood what you meant, but firewalld doesn’t offer a mechanism to turn off only ipv6 rules that I’m aware of.  So you’d need to use ip6tables directly, clear the rules, and then reload firewalld when you wanted to re-enable them.

    I’m assuming that you mean “systemctl disable ip6tables” which work if you have the iptables init scripts installed.  They normally aren’t. 
    The advice offered will work on a default installation.