Linux??IPTABLES???????
???????????? ???????[ 2014/4/2 10:33:03 ] ????????Linux ????
???????????????NAT?????
????1????????????NAT?????????
[root@tp rc.d]# iptables -t nat -L
Chain PREROUTING (policy ACCEPT)
target prot opt source destination
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
SNAT all -- 192.168.0.0/24 anywhere to:211.101.46.235
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
???????NAT??????ú????(?????????????????????????????????????).???????????NAT???ο????????????
?????????????????????NAT??????????????????????NAT??????????????????е?
??????????????????????
????[root@tp ~]# iptables -F -t nat
????[root@tp ~]# iptables -X -t nat
????[root@tp ~]# iptables -Z -t nat
????2????????
????????????NAT????????(???????????NAT????????????????)??
??????????????????DROP??.???????????ACCEPT.
?????????????????IP???
????[root@tp sysconfig]# iptables -t nat -A PREROUTING -i eth0 -s 10.0.0.0/8 -j DROP
????[root@tp sysconfig]# iptables -t nat -A PREROUTING -i eth0 -s 172.16.0.0/12 -j DROP
????[root@tp sysconfig]# iptables -t nat -A PREROUTING -i eth0 -s 192.168.0.0/16 -j DROP
????????????????????MSN??QQ??BT??????????????????????????IP??(???????????????)
????????
?????????211.101.46.253??????????
????[root@tp ~]# iptables -t nat -A PREROUTING -d 211.101.46.253 -j DROP
????????FTP(21)???
????[root@tp ~]# iptables -t nat -A PREROUTING -p tcp --dport 21 -j DROP
????????д??Χ??????????????????????.
????[root@tp ~]# iptables -t nat -A PREROUTING -p tcp --dport 21 -d 211.101.46.253 -j DROP
?????????????211.101.46.253?????FTP??????????????????.??web(80???)????.
??????????д??????????QQ??MSN???????????IP???????????????????Э?飬??????д????.
??????
????drop???????
????[root@tp ~]# iptables -A INPUT -m state --state INVALID -j DROP
????[root@tp ~]# iptables -A OUTPUT -m state --state INVALID -j DROP
????[root@tp ~]# iptables-A FORWARD -m state --state INVALID -j DROP
??????????????????????????????
????[root@tp ~]# iptables-A INPUT -m state --state ESTABLISHED??RELATED -j ACCEPT
????[root@tp ~]# iptables-A OUTPUT -m state --state ESTABLISHED??RELATED -j ACCEPT
????[root@tp ~]# /etc/rc.d/init.d/iptables save
????????????д??/etc/sysconfig/iptables???????.д????e???????????£????????????
????[root@tp ~]# service iptables restart
????????????棬????д?????????Σ???????????棬???????飬??????????????
????????????й??????????????????
????д??????£???????????????μ????????????????????飬????????????????????в????????????????????.
???????????????????????.????IPTABLES????????????????????????????????????????????????£????????.
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11