[GLLUG] Reinstate CentOS 6 firewall on CentOS 7

[M. Hamzah Khan]

Just do manually what the stop script done for you, ie flush the 
iptables rules:

# Sets default policies so you don't get kicked out.
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT

for table in filter nat mangle; do
     # Flush chains (deletes all rules)
     iptables -t ${table} -F

     # Delete chains
     iptables -t ${table} -X

     # Zero counters
     iptables -t ${table} -Z
done

*M. Hamzah Khan*
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On 24/10/15 12:40, gvim wrote:
> On CentOS 6 I had a fairly complex iptables firewall script which ran 
> happily from /etc/rc3.d and which I could reboot with a small script:
>
> #!/bin/bash
>
> service iptables stop
> /root/fw
> iptables -L
>
> After upgrading to CentOS 7 I changed the first line of this to:
>
> systemctl stop iptables
>
> ... but the results are erratic. Sometimes it duplicates directives, 
> and at other times it seems to mixed up with other systemd items. Any 
> advice on how to get a custom iptables firewall working on CentOS 7 
> appreciated.
>
> gvim
>
>
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