[Comm] Re: Как перезапустить IPTABLES без перез. компа?

[Michael Shigorin <mike@osdn.org.ua>]

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On Fri, May 28, 2004 at 11:03:05AM +0300, Maxim Tyurin wrote:
> > Подскажите, как правильно перезапустить iptables?
> > Пишу свои правила в файл /etc/sysconfig/iptables
> Туда нельзя писать (точнее очень не рекомендуется).

Да ну.  Размножать любимые шаблоны -- любимое же дело :)

Для архива -- цепляю таковую для eth0->10.0.1.0/24, eth1->наружу
(в DSL-модем, например) с несколькими удобными хуками и кусочками.

> Туда пишет/читает iptables

iptables-{save,restore}, точнее.

-- 
 ---- WBR, Michael Shigorin <mike@altlinux.ru>
  ------ Linux.Kiev http://www.linux.kiev.ua/

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# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A PREROUTING -d _REAL_IP -i eth0 -p tcp -m tcp --dport _EXT_PORT -j DNAT --to-destination _INT_HOST:_INT_PORT
-A POSTROUTING -s 10.0.1.0/24 -d ! 10.0.1.0/24 -j SNAT --to-source _REAL_IP
COMMIT
# Completed on Thu Nov 21 21:15:39 2002
# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
# Completed on Thu Nov 21 21:15:39 2002
# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:eth1-in - [0:0]
:eth1-out - [0:0]
:tcprules - [0:0]
-A INPUT -i eth1 -j eth1-in
-A INPUT -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
-A INPUT -s 10.0.1.0/24 -d 10.0.1.1 -i eth0 -j ACCEPT
-A INPUT -s 10.0.1.0/24 -d _REAL_IP -i eth0 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 25 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 110 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 113 -j REJECT --reject-with tcp-reset
-A INPUT -j tcprules
# block :25 to world (only through 10.0.1.1:25)
-A FORWARD -s 10.0.1.0/24 -p tcp -m tcp --dport 25 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -j tcprules
-A OUTPUT -o eth1 -j eth1-out
-A eth1-in -j RETURN
-A eth1-out -j RETURN
-A tcprules -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A tcprules -i ! eth1 -m state --state NEW -j ACCEPT
-A tcprules -i eth1 -m state --state INVALID,NEW -j DROP
-A tcprules -i eth1 -j REJECT --reject-with icmp-host-unreachable
COMMIT
# Completed on Thu Nov 21 21:15:39 2002

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# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A PREROUTING -d _REAL_IP -i eth0 -p tcp -m tcp --dport _EXT_PORT -j DNAT --to-destination _INT_HOST:_INT_PORT
-A POSTROUTING -s 10.0.1.0/24 -d ! 10.0.1.0/24 -j SNAT --to-source _REAL_IP
COMMIT
# Completed on Thu Nov 21 21:15:39 2002
# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*mangle
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
COMMIT
# Completed on Thu Nov 21 21:15:39 2002
# Generated by iptables-save v1.2.6a on Thu Nov 21 21:15:39 2002
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:eth1-in - [0:0]
:eth1-out - [0:0]
:tcprules - [0:0]
-A INPUT -i eth1 -j eth1-in
-A INPUT -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT
-A INPUT -s 10.0.1.0/24 -d 10.0.1.1 -i eth0 -j ACCEPT
-A INPUT -s 10.0.1.0/24 -d _REAL_IP -i eth0 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 25 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p udp -m udp --dport 53 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 53 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 110 -j ACCEPT
-A INPUT -d _REAL_IP -i eth0 -p tcp -m tcp --dport 113 -j REJECT --reject-with tcp-reset
-A INPUT -j tcprules
# block :25 to world (only through 10.0.1.1:25)
-A FORWARD -s 10.0.1.0/24 -p tcp -m tcp --dport 25 -j REJECT --reject-with icmp-port-unreachable
-A FORWARD -j tcprules
-A OUTPUT -o eth1 -j eth1-out
-A eth1-in -j RETURN
-A eth1-out -j RETURN
-A tcprules -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A tcprules -i ! eth1 -m state --state NEW -j ACCEPT
-A tcprules -i eth1 -m state --state INVALID,NEW -j DROP
-A tcprules -i eth1 -j REJECT --reject-with icmp-host-unreachable
COMMIT
# Completed on Thu Nov 21 21:15:39 2002

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