[ Linux ] 29 十一月, 2012 10:45

yum install setuptool

???????????, ?????????.

?????? 

yum install system-config-network-tui

[ Linux ] 28 十一月, 2012 16:57

????????NAT ??, ???????, ??????iptables ?????.

?????????iptables???

????? NAT??, ???? nat PREROUTING -> filter FORWARD -> nat POSTROUTING (mangle?????, ??)

?CentOS 6.3 ???firewall????????Forward? port

????????nat table??? MASQUERADE ????????forward???

?????????????

#vi /etc/sysctl.conf

?? net.ipv4.ip_forward = 1

#sysctl -p

#iptables -t nat -A POSTROUTING -s 192.168.xx.xx/24 -o eth1 -j MASQUERADE

??????icmp, udp 53, tcp ALL ?????????

#iptables -A FORWARD -p icmp -j ACCEPT
#iptables -A FORWARD -m state --state NEW -m udp -p udp --dport 53 -j ACCEPT
#iptables -A FORWARD -m state --state NEW -m tcp -p tcp --dport 1:65535 -j ACCEPT

??FORWARD Policy???????????icmp, ????? icmp????.
-A FORWARD -j REJECT --reject-with icmp-host-prohibited

#iptables -L --line-numbers
#iptables -D FORWARD 1


?????????????

#/etc/init.d/iptables save
????????????
#/etc/init.d/iptables restart

icmp reject ??? 1?icmp-net-unreachable 2?icmp-host-unreachable 3? icmp-port-unreachable 4?icmp-proto-unreachable 5?icmp-net-prohibited 6?icmp-host-prohibited