[CentOS] Question about rebooting and iptables rules persisting

Preston Crawford me at prestoncrawford.com
Tue Mar 27 15:02:00 UTC 2007


> On Tue, 2007-03-27 at 08:22 +0800, Feizhou wrote:
> Every time upon reboot, the rc.local file gets called right at the last
> and in that sequence your /root/myfirewall.sh gets called just before
> the system is ready to accept logins. All other services should have
> been up and running long before the /root/myfirewall.sh gets called.

That occurred to me. But it just seems to me that if the "upstream
provider" offers this GUI that manages the firewall, then the settings
should stick after you reboot. That's why I'm nonplussed about this whole
thing. Unless it has something to do with this being an original CentOS
4.0 install and something went amiss during updates, I'm not sure what it
is. So here is the output Feizhou asked for.

It's not very fancy. I just use the GUI tool to open port 80, the ssh port
and then the samba ports (137-139 and 445).

[root at myhost ~]# cat /etc/sysconfig/iptables
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
-A RH-Firewall-1-INPUT -p 50 -j ACCEPT
-A RH-Firewall-1-INPUT -p 51 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 137 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 137 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 138 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 138 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 139 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 445 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 445 -j
ACCEPT
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j
ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT




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