Цитата:
Сообщение от Messiah
Я и имел ввиду прописать правила в цепочки. А без форвардинга пустых строк куда они вписывать то будут, на словах то непонятно...
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дык пжалуста... небольшой скрипт настраивает НАТ для 2 машин кроме основной к которой подведен инет
Код:
# Generated by iptables-save v1.4.1.1 on Sun Jul 6 20:21:43 2008
*nat
:PREROUTING ACCEPT [103236:10847142]
:POSTROUTING ACCEPT [28659:1667790]
:OUTPUT ACCEPT [577404:47501864]
-A POSTROUTING -o eth0 -j SNAT --to-source 10.22.49.25
COMMIT
# Completed on Sun Jul 6 20:21:43 2008
# Generated by iptables-save v1.4.1.1 on Sun Jul 6 20:21:43 2008
*mangle
:PREROUTING ACCEPT [26378029:18362233038]
:INPUT ACCEPT [25332536:17682792196]
:FORWARD ACCEPT [979026:674426409]
:OUTPUT ACCEPT [26244402:13633074072]
:POSTROUTING ACCEPT [27252292:14311415831]
COMMIT
# Completed on Sun Jul 6 20:21:43 2008
# Generated by iptables-save v1.4.1.1 on Sun Jul 6 20:21:43 2008
*filter
:INPUT DROP [52305:9305430]
:FORWARD DROP [15:900]
:OUTPUT DROP [1183:131518]
:allowed - [0:0]
:bad_tcp - [0:0]
:icmp_pack - [0:0]
:tcp_pack - [0:0]
:udp_pack - [0:0]
-A INPUT -p tcp -j bad_tcp
-A INPUT -s 192.168.0.0/32 -i eth0 -j ACCEPT
-A INPUT -s 192.168.1.0/32 -i eth0 -j ACCEPT
-A INPUT -s 127.0.0.1/32 -i lo -j ACCEPT
-A INPUT -s 192.168.0.1/32 -i lo -j ACCEPT
-A INPUT -s 192.168.0.2/32 -i eth1 -j ACCEPT
-A INPUT -s 192.168.0.2/32 -i lo -j ACCEPT
-A INPUT -s 192.168.1.1/32 -i lo -j ACCEPT
-A INPUT -s 192.168.1.2/32 -i eth2 -j ACCEPT
-A INPUT -s 192.168.1.2/32 -i lo -j ACCEPT
-A INPUT -s 10.22.49.25/32 -i lo -j ACCEPT
-A INPUT -d 10.22.49.25/32 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i eth0 -p tcp -j tcp_pack
-A INPUT -i eth0 -p udp -j udp_pack
-A INPUT -i eth0 -p icmp -j icmp_pack
-A INPUT -d 224.0.0.0/8 -i eth0 -j DROP
-A FORWARD -p tcp -j bad_tcp
-A FORWARD -i eth1 -j ACCEPT
-A FORWARD -i eth2 -j ACCEPT
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -m limit --limit 3/min --limit-burst 3 -j LOG --log-prefix "IPT FORWARD packet died: " --log-level 7
-A OUTPUT -p tcp -j bad_tcp
-A OUTPUT -s 127.0.0.1/32 -j ACCEPT
-A OUTPUT -s 192.168.0.2/32 -j ACCEPT
-A OUTPUT -s 192.168.0.1/32 -j ACCEPT
-A OUTPUT -s 192.168.1.1/32 -j ACCEPT
-A OUTPUT -s 192.168.1.2/32 -j ACCEPT
-A OUTPUT -s 10.22.49.25/32 -j ACCEPT
-A OUTPUT -m limit --limit 3/min --limit-burst 3 -j LOG --log-prefix "IPT OUTPUT packet died: " --log-level 7
-A allowed -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -j ACCEPT
-A allowed -p tcp -m state --state RELATED,ESTABLISHED -j ACCEPT
-A allowed -p tcp -j DROP
-A bad_tcp -p tcp -m tcp --tcp-flags SYN,ACK SYN,ACK -m state --state NEW -j REJECT --reject-with tcp-reset
-A bad_tcp -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -j LOG --log-prefix "NEW not SYN:"
-A bad_tcp -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -j DROP
-A icmp_pack -p icmp -m icmp --icmp-type 8 -j ACCEPT
-A icmp_pack -p icmp -m icmp --icmp-type 11 -j ACCEPT
-A tcp_pack -p tcp -m tcp --dport 21 -j allowed
-A tcp_pack -p tcp -m tcp --dport 22 -j allowed
-A tcp_pack -p tcp -m tcp --dport 80 -j allowed
-A tcp_pack -p tcp -m tcp --dport 443 -j allowed
-A tcp_pack -p tcp -m tcp --dport 831 -j allowed
-A tcp_pack -p tcp -m tcp --dport 3306 -j allowed
-A tcp_pack -p tcp -m tcp --dport 3690 -j allowed
-A tcp_pack -p tcp -m tcp --dport 65532 -j allowed
-A tcp_pack -p tcp -m tcp --dport 135:139 -j allowed
-A udp_pack -p udp -m udp --dport 53 -j ACCEPT
-A udp_pack -p udp -m udp --dport 123 -j ACCEPT
-A udp_pack -p udp -m udp --dport 2074 -j ACCEPT
-A udp_pack -p udp -m udp --dport 3690 -j ACCEPT
-A udp_pack -p udp -m udp --dport 4000 -j ACCEPT
-A udp_pack -d 255.255.255.255/32 -i eth0 -p udp -m udp --dport 67:68 -j DROP
COMMIT
# Completed on Sun Jul 6 20:21:43 2008